UV Index
UV Index
Today's UV index in Chennai, India 
will be up to 11.8, indicating a extreme level of sun exposure for the average person. Check our tips for today to make sure you're safe in the sun.
Last checked: 2025-06-01
UV index at 11.8 in Chennai means extreme risk: limit outdoor time especially from 10 a.m. to 4 p.m., actively seek shade, wear protective clothing, broad-brimmed hat, apply SPF 30+ sunscreen every 2 hours, and wear UV-blocking sunglasses. Watch for bright surfaces like water and snow increasing UV exposure.
Chennai's UV index is very high, especially from March to June, often reaching levels above 10, meaning strong ultraviolet radiation from the sun. This is typical for tropical coastal cities.
The city has a hot and humid tropical climate with hot summers from March to May, a monsoon season from June to September, and mild winters from December to February. Rainfall mainly occurs during the northeast monsoon around October and November.
Compared to the rest of India, Chennai is warmer and more humid year-round due to its coastal location. Neighboring states like Tamil Nadu have similar climates, but inland areas experience greater temperature changes and less humidity.
See the UV index hour by hour for Chennai, along with the temperature and how cloudy it is. If the UV level is higher than moderate, it's best to avoid direct sunlight.