The highest day temperature in September 2026 was 98°F. The lowest night temperature was 83°F. The average values for day and night temperatures during September were 93.8°F и 85.9°F respectivly.

The average sea surface temperature in September 2026 for Chennai was 88.2°F. The maximum and minimum values were 87.2°F and 89.2°F respectively.

Most of the days in September are cloudy but you can also expect sunny or gloomy days.

Precipitation total in September for Chennai is 3.7 in. It makes september one of the most rainy months of the year.

The average wind speed in September is 9.7 mph. It makes September one of the most windless months of the year for Chennai.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Chennai in September is 6.8 hours.