Weather in Chennai in September 2025
Average weather
Average temperature in Chennai in September
Going from a maximum of +91°F during the day to a minimum of +79°F during the night, the temperature in September averages around +88°F.
The average maximum temperature goes up 0% by the end of the month, compared with the beginning of the month, from +88°F to +88°F.
Is Chennai warm or cold in September?
Chennai is typically hot in September.
Maximum temperatures go down compared to the previous month from +90°F to +88°F. The minimum temperature also goes up from +81°F to +81°F.
Make sure that you pack your summer linen and swimming costumes; it’s probably going to be hot.
Take a look at how September is compared to other months in Chennai:
Climate in Chennai in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +90°F | +88°F | +86°F | ||||
| Min. temperature | ||||||
| +75°F | +73°F | +72°F | ||||
| Max. temperature | ||||||
| +100°F | +97°F | +99°F | ||||
| Rainfall | ||||||
| 85 mm | 99 mm | 170 mm | ||||
| Wind | ||||||
| 2 m/s | 2 m/s | 2 m/s | ||||
| Humidity | ||||||
| 74% | 78% | 82% | ||||
| Air pressure | ||||||
| 1005 HPa | 1006 HPa | 1008 HPa | ||||
| Sunny days | ||||||
| 0 | 0 | 2 | ||||
| Cloudy days | ||||||
| 9 | 7 | 6 | ||||
| Rainy days | ||||||
| 16 | 16 | 19 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September typically has worse weather conditions compared to August. It’s getting colder in September. From +90°F in the day, the average maximum temperature lowers to +88°F. Prepare for more rain. Average rainfall goes from 85 mm to 99 mm. Humidity rises from 74% to 78%. The average wind speed doesn’t change much during September, staying around 2 m/s. The amount of sunny days stay about the same, averaging 0 sunny days during the month.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Chennai is gradually increasing during September, going from 3 m/s to 3 m/s over the course of the month.
Rain
How was the weather last September in Chennai?
Climate Change Over the Years
The climate in Chennai in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1989 (+85°F) and the highest in 2019 (+91°F). The driest year was 1982 with only 445 mm of rainfall, and the wettest year was 1996 with 1545 mm.
FAQ
Is September a good time to visit Chennai?
Can you sunbathe in Chennai in September?
Is Chennai rainy in September?
Is it sunny in Chennai in September?
Other cities in India
Monthly weather in Chennai
Source of the data
For this page, we’ve looked at the typical weather in Chennai, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.