The observatory had recorded a minimum of 3.4 degrees Celsius on Sunday, the lowest this season so far.
The minimum temperature had increased slightly to 5.5 degrees Celsius on Monday under the influence of a fresh Western Disturbance (WD) affecting the upper reaches of the Himalayas.
The maximum temperature settledat 23.5 degrees Celsius, two notches more than normal.
After the WD withdraws on Tuesday, the temperatures are expected to drop again, Mahesh Palawat, an expert at Skymet Weather, a private forecasting agency, said.
The Western Disturbance led to light to moderate snowfall in the upper reaches of Jammu and Kashmir, Ladakh and Himachal Pradesh, he said.
Another Western Disturbanceis likely to affect the upper Himalayan region from December 26, Palawat said.
For the plains, the IMD declares acoldwavewhen the minimum temperature is 10 degrees Celsius or below and is 4.5 notches less than normal for two consecutive days.
However, for small areas such as Delhi, acoldwavecan be declared if the criteria is fulfilled even for a day, officials said.
According to the IMD, verydensefogis when visibility is between 0 and 50 meters, 51 and 200 is dense, 201 and 500 moderate, and 501 and 1,000 shallow.
(Only the headline and picture of this report may have been reworked by the Business Standard staff; the rest of the content is auto-generated from a syndicated feed.)
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