Today(17.12.2021)
Light to moderate rain is likely to occur at isolated places over Pudukottai, Ramanathapuram & Delta districts of Tamilnadu and Karaikal area.
Mainly dry weather is likely to prevail over rest Tamilnadu and Puducherry.

Tomorrow (18.12.2021)
Light rain is likely to occur at isolated places over south coastal Tamilnadu.
Mainly dry weather is likely to prevail over rest Tamilnadu, Puducherry & Karaikal area.

LOCAL FORECAST FOR CHENNAI CITY AND NEIGHBOURHOOD:
For next 24 HRS:
Sky condition is likely to be partly cloudy. Maximum and minimum temperature is likely to be around 30˚C and 24 ˚C respectively.

Reference:
http://imdchennai.gov.in/tn_fc.pdf
http://www.imdchennai.gov.in/hrw_district.htm