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At 40.1°C, Monday Marks Delhi's Hottest March Day in 76 Years; NCR To Remain Hot Till Wednesday | The Weather Channel – Articles from The Weather Channel | weather.com – The Weather Channel

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Tuesday, March 30: March was a month when residents of Delhi used to wear sweaters to the office or at least keep them handy in their bags as mercury levels hovered between 15 to 30°C. This year, however, the daytime temperature in the capital city has been going off the charts with Monday, March 29, marking the hottest March Day since 1945.
On Monday, Delhi’s base weather monitoring station at Safdarjung recorded a maximum temperature of 40.1°C, the highest temperature in March since March 31, 1945, when the mercury levels rose to 40.6°C. The daytime temperature was a whopping eight degrees above the average for this time of the season, as Delhi reeled under a “severe heatwave”.
While Safdarjung, which provides representative data for the city, recorded a maximum of 40.1°C, other parts of NCR like Narela, Najafgarh, Pusa and Pitampura also sizzled at temperatures above 41°C on Monday. Aya Nagar, Guruigram, and Mungeshpur also registered temperatures above 40°C. Monitoring stations in Palam, Delhi University, Lodhi Road and Ridge also reached a maximum temperature of more than 39°C but did not breach the 40°C-mark.
The India Meteorological Department (IMD) declares a ‘heat wave’ if the maximum temperature breaches the 40°C-mark for plains and the alert is upgraded to a ‘severe heat wave’ if the departure from the average is more than 6.4°C.
As per the forecasts from the IMD, this week is likely to offer some respite, but Delhi-NCR is likely to experience warmer temperatures at least till Wednesday. The temperature is likely to decrease during the second half of the week and reach 36-37°C in the first five days of April. On Tuesday, however, daytime temperature could go beyond 40°C in some parts of the National Capital Region.
Moreover, strong surface winds of up to 40 kmph are likely to prevail over Delhi from Wednesday to Friday during day time while skies remain mainly clear throughout the week. The air quality has remained moderate with an air quality index (AQI) of 183 on Tuesday morning, as per the System of Air Quality Weather Forecasting and Research (SAFAR). The strong winds are likely to improve the ventilation further. The dust pollution due to high wind speed could affect the air quality over Delhi-NCR this week, pushing the AQI to the ‘poor’ category.
The intense heat in March appears to be a forewarning for the upcoming harsh summer months over Delhi NCR. The latest seasonal outlook from the IMD suggests that northwestern parts of the country, including Delhi, must brace for a hotter-than-usual summer this year. In March, April and May, the subdivision of Delhi, Haryana and Chandigarh is expected to witness a whopping 0.71°C warmer-than-normal daytime temperatures on an average, while the night time temperatures could remain 0.13°C warmer.
The warmer trends have prevailed over Delhi since the winter season. The capital city recorded the mean maximum temperature of 27.9°C in February, which was found to be the second-highest for the month since 1901.