September weather in India
This is a collection of articles, mainly from the Delhi- based press. |
This page is under construction. Data will continue to be added over the next several years. September
September as a whole
India as a whole
1917-2019, the wettest Septembers/ 2019 rainfall
AMIT BHATTACHARYA, Sep 30, 2019: The Times of India
Rainfall in India in June-Sept 2019
From: AMIT BHATTACHARYA, Sep 30, 2019: The Times of India
Vigorous and relentless monsoon rain has put this month on course to be the wettest September India has seen in 102 years and lifted the June-September season’s rain to 9% above normal, barely a percentage point short of excess monsoon rainfall.
With a day left in the month, all-India average rainfall in September stands at 247.1mm — 48% above normal and the third highest in India Meteorological Department’s records since 1901. By Monday, the month’s rainfall is likely to go past 1983’s figure (255.8mm), as red alerts for very heavy rain have been issued for Gujarat and Bihar. If that happens, this will be the wettest September in India in over a century, behind only 1917 (285.6mm), when the highest rainfall for the month since 1901 was recorded.
This year’s monsoon, which began with a delayed onset and a 33% rain deficit in June, will officially end on Monday with the country recording the highest rainfall for the four-month period in 25 years. The all-India average seasonal rainfall stands at 956.1mm, 9% higher than the normal of 877mm till Sunday.
The monsoon’s retreat is still not in sight. “There are no signs of withdrawal for at least four-five days,” said Mrutyunjay Mohapatra, director general of meteorology at IMD.
Monsoon has been active over the country almost without a break for over two months. Cumulative rainfall in August and September so far is the highest witnessed for these two months in 31 years. By Monday, August-September rainfall could end up as the highest in 58 years (since 1961) and fourth highest since 1901, as per IMD’s records.
September has recorded just two days of below normal rains across the country. In August, that figure was 10, still low by normal standards. Three reasons for monsoon deluge since Aug: IMD
India Meteorological Department said there were three reasons for the monsoon deluge since August. “El Nino conditions over the Pacific Ocean, which suppress the monsoon, receded in July. At the same time, conditions in the Indian Ocean became favourable for monsoon with the Indian Ocean Dipole turning positive. The third factor was the development of a series of low pressure systems in the Bay of Bengal. Although the number of such systems wasn’t unusually high, some of these caused heavy rains for a long time by persisting over the central Indian region,” said Mohapatra.
The top IMD official particularly pointed to one low pressure system that continued to remain active for over 10 days, mainly hovering over Madhya Pradesh and east Rajasthan.
This pattern of rainfall, seen since the third week of July, soaked central India in particular. The region went from being 20% monsoon deficient to over 28% rain surplus by the end of the season. The turnaround was even more dramatic in south India, which was reeling under a monsoon deficit of nearly 30% by July 19, with drought conditions in many districts. By Septemberend, the region was 16% rain surplus for the season.
While the monsoon was adequate in northwest India, which currently has a slight deficit of 3%, the region clearly missed out on the rain bounty. Haryana, Delhi and east Uttar Pradesh in particular will end the season with high deficits.
Three reasons for monsoon deluge since Aug: IMD
India Meteorological Department said there were three reasons for the monsoon deluge since August. “El Nino conditions over the Pacific Ocean, which suppress the monsoon, receded in July. At the same time, conditions in the Indian Ocean became favourable for monsoon with the Indian Ocean Dipole turning positive. The third factor was the development of a series of low pressure systems in the Bay of Bengal. Although the number of such systems wasn’t unusually high, some of these caused heavy rains for a long time by persisting over the central Indian region,” said Mohapatra.
The top IMD official particularly pointed to one low pressure system that continued to remain active for over 10 days, mainly hovering over Madhya Pradesh and east Rajasthan.
This pattern of rainfall, seen since the third week of July, soaked central India in particular. The region went from being 20% monsoon deficient to over 28% rain surplus by the end of the season. The turnaround was even more dramatic in south India, which was reeling under a monsoon deficit of nearly 30% by July 19, with drought conditions in many districts. By Septemberend, the region was 16% rain surplus for the season.
While the monsoon was adequate in northwest India, which currently has a slight deficit of 3%, the region clearly missed out on the rain bounty. Haryana, Delhi and east Uttar Pradesh in particular will end the season with high deficits.
Delhi
2011-20: temperature, rain
October 1, 2020: The Times of India
The number of rainy days in Delhi in September, 2011-20.
From: October 1, 2020: The Times of India
Delhiites sweat in hottest Sept in 2 decades
Delhi had its warmest September in two decades this year, with the capital averaging a maximum temperature of 36.2o C through the month.
The last time the capital recorded a higher average temperature in September was in 2001when the monthly average was 36.3o C, reports Jasjeev Gandhiok.
The maximum temperature was recorded at 35.6o C on Wednesday, one degree above normal.
Capital sees only 3 rainy days in Sept
Delhi recorded only three rainy days in September this year and no showers were recorded from September 8, leading to a spike in the maximum temperature as well as humidity levels.
Usually, the southwest monsoon starts withdrawing around September 25. Over the last few years, a late monsoon arrival in the city has, however, meant the withdrawal only occurred in October. Kuldeep Srivastava, a scientist at IMD, said the city generally tends to record a good spell of rain towards the end of the month, especially when the monsoon is withdrawing, which wasn’t the case this year. “With a spell of rain, the temperature comes down naturally but that did not happen this time. Only one day saw ‘moderate’ rainfall in Delhi and the other two days recorded only ‘very light’ rainfall. That is generally not enough to impact the maximum temperature,” Srivastava claimed.
The highest maximum recorded in September 2020 was 38° Celsius on September 19. The lowest was 33.2° Celsius on the first day of the month.
In comparison, September 2018 had 14 rainy days, leaving the average monthly temperature down to just 32.7 degrees Celsius, the lowest in the last decade. Earlier, the date for monsoon withdrawal in the capital was September 21, but it has been recently adjusted to September 25.
IMD states with no rain expected in the next seven days, October is also likely to start warm. The maximum temperature is likely to be around 37° Celsius until October 3.
Monsoon withdrawal dates
2015-19/ Delhi
September rainfall in Delhi
Date of withdrawal of the monsoon from Delhi.
From: Priyangi Agarwal & Jasjeev Gandhiok, September 19, 2020: The Times of India
See graphic:
2015-19:
September rainfall in Delhi
Date of withdrawal of the monsoon from Delhi.
Rainfall
Total rainfall during the month
Delhi
2009 – 2023
From: Priyangi Agarwal, Sep 25, 2023: The Times of India
See graphic:
Total rainfall during September in Delhi, 2009 – 2023
Highest single-day rainfall in Sept
Indore
10 inches: 2023, September 16
6.8 inches of rain: 1962
Warm Septembers
Hottest days in Septemebr
Delhi
1901 onwards
40.6 degrees C, 1938 September 16, at Safdarjung
40.1 degrees Celsius, 2023, Sept 4 at Safdarjung, six degrees above normal. The temperature reached 40 degrees Celsius at Safdarjung for the first time in September since 1938.
Since 1901, These were the only two occasions in September when the day temperature surpassed 40 degrees Celsius.
38.5 degrees on September 4, 2005
Rajasthan
Jaisalmer, 1948 onwards
The oldest records available date to 1948
43.5° Celsius September 9, 2023
43.3°C September 10,1949.
Heat: Mean/ peak temperatures
Delhi: 1992, 2014, 2019
Amit.Bhattacharya, Sep 19, 2019: The Times of India
From: Amit.Bhattacharya, Sep 19, 2019: The Times of India
The long and oppressive “summer” for Delhiites continues. It has been so unusually warm in September so far that mean temperatures for the first 18 days of the month have been higher than those in August and similar to temperatures in July this year.
Both maximum and minimum temperatures in September, as recorded at Safdarjung, have been more than 2 degrees Celsius higher than normal. At 36.2 degrees C, the mean maximum temperature is not just higher than that recorded in August (34.9 degrees C), it’s higher than mean maximum August temperatures since 2014.
The nights have been even more unusually warm. The mean minimum temperature so far this month, 27.7 degrees C, is even higher than the mean minimum recorded in July (27.6 degrees C). Such high average minimum temperatures haven’t been recorded in August since at least 1992, according to met office records.
To make matters worse, humidity continues to be high, making the conditions oppressive. “Warm easterly winds have been blowing through September, bringing moisture into the region and keeping humidity levels high,” said Kuldeep Srivastava, head of IMD’s regional weather forecasting.
On September 12, the minimum temperature climbed to 29.6 degrees C, the highest minimum temperature recorded during the month since at least 1992. Even in August, such high minimum temperatures haven’t been seen since 2012.
On the same day, the maximum temperature touched 38.2 degrees C, the highest in September since 2005.
On Wednesday, both minimum and maximum temperatures fell more than a degree from the previous day, making the conditions perceptibly more pleasant. However, both the maximum (35.1 degrees C, which in IMD’s records will be counted as Thursday’s maximum) and the minimum still remained higher than normal.
Met officials said the high temperatures were directly linked to deficient monsoon rains in Delhi-NCR. This monsoon season, Delhi has received less than two-thirds of its normal share of rains so far. The rainfall deficit in the city since June 1 stands at 37%. In September, the Safdarjung station has so far recorded 50.4mm of rain against a normal of 129mm for the entire month.
“The east-west monsoon trough usually oscillates up and down, bringing rain to the northern regions in the process. For the last 20-25 days, the trough has remained mainly around Madhya Pradesh and hasn’t moved up. Which is why, Delhi hasn’t received any substantial rain, except on one day, during this period. This is pushing up temperatures,” Srivastava said.
He said no significant change in temperatures and humidity can be expected in the next few days. “Delhi-NCR will continue to feel the impact of easterly winds. Only isolated, light rainfall is likely to take place, if at all, during this period,” Srivastava added.
1st September
Delhi: 67.6mm rain, 32.6°C mx / 2017
The Times of India (Delhi) City records wettest day in 3 yrs, more rain likely
Showers continued across the capital on Friday , bringing down temperature. The maximum temperature was recorded at 32.6 degrees Celsius, two notches below normal for the season. It was also the wettest day in the capital in nearly three years with 67.6mm rainfall recorded between 8.30am on Thursday and 8.30am on Friday . . Rain also brought waterlogging with it. Safdarjung observatory recorded further 4.6mm rainfall in nine hours after 8.30am on Friday . Delhi's other stations also recorded similar figures till 8.30am on Friday: Palam recorded 32.5mm, Lodhi Road saw 51.4mm, Ayanagar registered 38.1mm and Najafgarh recorded 44mm of rainfall. A spell of heavy but short-duration rain was recorded on Friday with Palam, Lodhi Road and the Ridge stations recording 5mm, 5.2mm and 1.6mm of rainfall in a 9-hour period from 8.30am to 5.30pm. Faridabad, meanwhile, received 97mm of rainfall in 24 hours till 8.30am on Friday .
1-4th September
Delhi: 127.6mm rain / 2018
2018 City crosses monthly rainfall avg in 4 days The Times of India
Delhi crossed the monthly rainfall average of September in just four days as strong showers were recorded once again in the early hours of Tuesday. Till 8.30am, Delhi recorded 41.6mm of rainfall as parts of the capital saw severe waterlogging, leading to traffic. For the month of September, Delhi has already received 127.6mm of rainfall till 8.30am on September 4 — already 2.5mm more than the entire month’s rainfall average of 125.1mm. Till this time, September usually has an average of 28.8mm of rainfall in the first four days, Met officials said. According to the Met office, the intensity of rain was strong in the morning in some parts. However, only light rain and drizzle activity was recorded after noon. Stations like Lodhi Road, Ridge and Ayanagar received 11.9mm, 5.9mm and 7.1mm of rainfall respectively till 8.30 am, officials said.
1- 4 September
Delhi: 151.4mm rain / 2018
Till Thursday 8.30am, the capital had received 151.4mm rainfall in September. According to IMD, the average rainfall for the entire month is 125.1mm.
2nd September
3rd September
4th September
5th September
6th September
Delhi: 34.6°C mx, humidity 60 to 94%, light rainfall/ 2018
2018 Expect cloudy skies and more rain today
Light to moderate showers on Thursday evening brought a respite from the otherwise sultry weather — bringing down the mercury by several notches. In the first week of September, the rainfall has already exceeded the monthly average. Delhi received light rainfall during the day, however, by the evening, most parts recorded intense shower with temperatures dropping by 3-5 degrees in some places. Delhi’s maximum temperature on Thursday was recorded at 34.6 degrees Celsius with sunny conditions recorded in the early hours, while the humidity levels oscillated between 60% and 94%.
7th September
Delhi, 40km/hr wind, 34.1°C mx, 24.6°C min/ 2018
2018 Afternoon rain delays over 100 flights, grinds traffic to halt
Over 100 flights were delayed and at least 17 diverted on Friday after a spell of strong showers in the afternoon. Most diversions took place between 3:30pm and 4:30 pm, officials said. Several stretches in south and southwest Delhi reported traffic snarls due to waterlogging during this period. R K Jenamani, met head at IGI airport, said an ‘intense’ spell of rain occurred between 2.30pm and 3.45 pm with wind speeds touching 40km/hr. “The wind direction changed four times during this period, making it difficult for flights to land. It must be understood, however, that a number of flight disruptions and diversions had nothing to do with peak wind speed, but the height of thunderstorm clouds that stand at flight path and trigger wind shear while flights are descending,” Jenamani said. Delhi’s maximum temperature on Friday was 34.1 degrees whereas the minimum was 24.6 degrees Celsius.
8th September
9th September
Delhi
5.8mm rain, 32.7°C mx, 65 to 97% humidity/ 2018
2018 Break from rain: Humidity down, but temp to rise
The capital recorded 5.8mm of rainfall till 8.30am on Sunday in a 24-hour period. After that, however, it saw clear skies during the remaining part of the day. Delhi’s maximum temperature was recorded at 32.7 degrees Celsius — one degree below normal, while the humidity levels oscillated between 65 to 97% in the last 24 hours.
The capital has received almost 180mm of rainfall so far in the month of September as compared to a monthly average of 125.1mm. The monthly figure was crossed in just four days with Delhi receiving light to moderate spells of rain from September 1 onwards.
Rajasthan, western: hot days
2023
Maximum temperatures recorded:
Jaisalmer 43.5° Celsius : An all- time record
Barmer 40.3° C
Bikaner 40.0,
Jodhpur 39.5
Sriganganagar 38.5.
10th September
11th September
12th September
13th September
14th September
15th September
16th September
17th September
18th September
19th September
20th September
Mumbai, Colaba 75mm, Santa Cruz 61mm/ 2017
2017 : The Times of India (Delhi) Mumbai gets a month's quota of rain in 24 hrs by Richa Pinto
The city experienced yet another intense downpour, the second time this season, receiving almost as much rain over Tuesday and Wednesday as it usually does in an entire month.
Data from India Meteorological Department (IMD) indicated that in 24 hours, starting 8.30am on September 19, Mumbai recorded about 304mm of rainfall [???], just shy of the 312mm average [???] set for the entire month of September.
It was also the second wettest September day in IMD's over 100-year recorded history. “The IPCC has said owing to climate change we'll keep seeing such heavy rain over short intervals,“ said Prof Kapil Gupta from the department of civil engineering at IIT Bombay and an expert on urban flooding.
The impact was mostly felt in western suburbs like Andheri, Borivali, Dahisar, Dindoshi, where many streets were under water, especially those adjoining subways connecting eastern and western parts.
Railway and road transport were unaffected as traffic was thin owing to the government's proactive decision to shut down schools and colleges. Heavy rains lasted till Wednesday morning before the low pressure zone, which caused it, moved away from the region. Incidentally , the total rain recorded was barely 27mm less than that recorded on August 29, the last such day on which heavy rain lashed the metropolis. By Wednesday morning, however, the weather system weakened and showers became intermittent.
Rain recorded by IMD's Colaba observatory over 12 hours from 8.30am to 8.30pm on Wednesday was 75mm while IMD's Santacruz observatory recorded 61mm in the same period. Weathermen said persistent weather systems in both the Arabian Sea and the Bay of Bengal had led to heavy cloud formations, but the system had started to move westwards. “The low pressure in the Bay of Bengal has moved westwards and now it's over Chattisgargh. From this, one trough extending through Madhya Maharashtra gave Mumbai this intense rain activity ,“ said IMD's deputy DG (western region) K S Hosalikar. He dismissed talk of a cyclone building up in the region. Prof Gupta said a combinations of reasons, including the urban heat island effect, had led to the spell of heavy rain.
21st September
22nd September
Delhi, 43.6mm rain, 27.5°C mx, 26.5°C min, humidity 10%> 69%/ 2017
From [ The Times of India ]
The Times of India (Delhi) More rain today, but not as much as Friday
It was dark and gloomy for the better part of Friday as a strong spell of rain lashed Delhi and its suburbs. Heat and humidity disappeared, but traffic snarls came back.
Delhi received around 43.6mm of rainfall in a 12-hour period till 8.30pm.
The maximum temperature was recorded at 27.5 degrees Celsius, seven degrees below normal for the season with people heading out to India Gate and Connaught place to enjoy the weather.
The Safdarjung weather observatory recorded 43.6mm rainfall between 8.30am to 8.30pm on Friday , while other weather stations at Lodhi road, Ayanagar and Ridge received rainfall over 20mm in a 9hour period between 8.30am and 5.30pm. Faridabad received 106mm of rainfall during the same period.
“The rainfall at Lodhi road, Ridge and Ayanagar between 8:30am and 5:30pm was recorded at 22.3mm, 22.7mm and 24mm respectively.Meanwhile, Safdarjung and Palam also received strong rainfall, recording 43.6mm and 32.3mm of rainfall from 8.30am and 8.30pm. More rain is likely to take place on Saturday , however the intensity will be lesser,“ said a met official.
Friday's minimum temperature was recorded at 26.5 degrees Celsius, two notches above normal with humidity oscillating between 69% and 10% in a 24-hour period, officials said.
23, 24, 25 Sept 2018/ Rainfall
North India average: 38.9mm of rain/ 2018
From [ The Times of India ]
From [ The Times of India ]
21-25 Sept, 2018 very heavy rainfall in four northwest Indian states
North pounded by heaviest two-day rainfall in 3 years/ Wettest Sept In Himachal Since 2004 by Amit.Bhattacharya@timesgroup.com
The remnant of cyclone Daye, which hit Odisha coast last Saturday and surged inland, brought the wettest weather seen over north India in three years. The system dumped an average of 38.9mm of rain on Sunday and Monday, the highest two-day spell of rainfall in the region since July 2015, with Himachal Pradesh witnessing its rainiest September in at least the last 14 years. (i.e. since 2004? )
Monday 24 was the wettest September day over north India since 2014, India Meteorological Department (IMD) records reveal. It was also the 'heaviest day of rain in the region, for any month, since July 2016.
“North India saw extreme weather over the past few days caused by the interaction of moisture brought in by cyclone Daye in the form of low pressure with a westerly system that circulated that moisture across the region,” said K J Ramesh, director general of IMD.
Himachal Pradesh was ground zero of the deluge. In four days, the state received nearly 33% more rain than its normal for the entire month of September. Rainfall totalling 166.7mm battered the state during this period, triggering flash floods and landslides. Normal rainfall in the state for the whole month of September is a little more than 125mm.
The most severe weather in Himachal was on Sunday 23. The state was pounded with an average of 67.9mm of rain, more than 15 times the normal. That day, the wettest districts of Una and Hamirpur were deluged with more than 96mm of rain, over 16 times the normal in the case of Una.
“After this intense spell, Himachal Pradesh has so far received 255mm of rain in September. It is the highest rainfall in the state during the month since at least 2004. Rain records earlier than 2004 are not readily available,” said Manmohan Singh, head of Himachal’s Met department in Shimla.
The four-day wet spell lifted the monsoon figures of Haryana — which had a seasonal deficit of 22% on September 21 — to well within the normal range at an overall shortfall of just 8%. Punjab’s deficit of 16% (as on September 21) was wiped out and the state now has a monsoon surplus of 10%. The deluge, however, has reportedly caused damage to standing paddy and cotton crops in the region.
Yamuna crosses danger mark
Yamuna crossed the ‘danger’ mark of 204.83 metres on Tuesday 25 morning and was flowing above the 205m mark by the afternoon after the release of more than 10 lakh cusecs of water from the Hathni Kund barrage since Monday
Northwest India
“On Sunday, 19mm of rain was recorded over northwest India, which was 533% of the normal for the day. Monday’s 19.9mm rainfall was 454% of the normal. It the wettest day in the region since July 17, 2016, when 20.6mm was recorded,” said A K Srivastava, head of IMD’s climate monitoring and analysis group.
Northwest India is a meteorological region comprising J&K, Himachal, Uttarakhand, Punjab, Haryana (including Delhi and Chandigarh), Rajasthan and Uttar Pradesh.
The rainfall also lifted the countrywide monsoon deficit, which was 10% on September 21, to 8.5%, brightening the possibility of this year’s rainfall ending up in the below-normal range (between -4 and -10%). A shortfall of greater than 10% is termed as a deficient monsoon, popularly known as a drought year.
23rd September
24th September
Himachal Pradesh: Heavy rains, flash floods, landslides / 2018
2018 Rains kill 13 in north India; 378 HP roads closed
Shimla: Heavy rains triggered flash floods and landslides across Himachal Pradesh, claiming the lives of seven people and leaving three injured, even as hundreds of people were evacuated to safety and several houses and vehicles were washed away in the deluge on Monday. The death toll across north India was at least 13, with agencies reporting that a family of five was buried alive in a landslide in J&K’s Doda district while a 45-year-old man died in a roof collapse in Haryana’s Ambala district. Three people, including a girl, were swept away by flash floods in Kullu while two others stranded were airlifted to safety. In Jwali area of Kangra, a 31-yearold was swept away in the swollen Nahad rivulet. A 50-year-old man, Kuldeep Chand Sharma, drowned in a village water channel in Dharamshala while a seven-month old baby drowned after her mother slipped and fell in a water channel in Gulel village of Salooni tehsil in Chamba. At Gagret in Una, the manager of a juice factory was killed after a landslide hit the factory. Heavy rain severely affected life in 10 of 12 districts of HP. On Monday, 378 roads were closed due to landslides.
Delhi, 27.8°C mx, 16.3mm rain, hmdty 71 to 100% / 2018
2018 Expect light rain today but dry spell likely after that
Strong showers were recorded in the early hours of Monday and during the day as maximum temperature remained several degrees below normal.Delhi’s maximum temperature on Monday was recorded at 27.8 degrees Celsius — six degrees below normal for the season. The Safdarjung observatory received 16.3mm of rainfall till 8.30am on Monday, recording another 8.8mm of rainfall in the next nine hours. Delhi’s other weather stations recorded similar rain activity overnight with Palam, Lodhi Road and Ayanagar – all receiving over 20mm of rainfall till 8.30am. The humidity levels also remained on the high side, oscillating between 71 to 100%, however that is likely to reduce in the coming days, an official said.
25th September
26th September
Yamuna at ‘severe’ level/ 2018
2018 Yamuna continues to swell, now at ‘severe’ level TIMES NEWS NETWORK
After crossing the ‘danger’ mark on Tuesday, Yamuna’s water level continued to rise on Wednesday and was recorded at 205.79 metres in the evening, almost one metre above the danger level. The water level continued to rise after more water was released from the Hathni Kund barrage in a staggered manner.
The sudden rise in water levels had forced chief secretary Anshu Prakash to hold a review meeting on Tuesday, issuing directions to get tents erected and evacuation work to begin as soon as possible to clear low-lying areas near the river. According to the district magistrate, around 1,400 tents have been erected in six districts so far with 598 people evacuated following the sudden increase in water.
According to the Central Water Commission (CWC), on Wednesday the water level was classified in the “severe” category which is the highest warning level for a river.
27th September
28th September
29th September
30th September
See also
January weather in India <> February weather in India <> March weather in India <> April weather in India <> May weather in India <> June weather in India <> July weather in India <> August weather in India <> September weather in India <> October weather in India <> November weather in India <> December weather in India
