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Chennai Weather in September
With daytime temperatures of 33°C (91°F) and nighttime lows of 27°C (81°F), September in Chennai brings very high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 112 mm (4.4 in) falls on average.
Rainfall in Chennai in September
You can expect rain on around 7 days based on historical patterns, with 112 mm (4.4 in) average for the month. Rainfall tends to arrive in short, intense showers this month. Rain days are few, but the showers can be surprisingly heavy.
Temperature in Chennai in September
Expect highs of 33°C (91°F) in Chennai in September, with nights dropping to around 27°C (81°F). Sunshine and humidity can make it feel even warmer than the raw temperature suggests. With lows of 27°C (81°F), it stays warm throughout the night. A cold shower before going to sleep is one of the easiest ways to cool down before bed.
Sunshine in Chennai in September
There are approximately 198 hours of sunshine this month, resulting in mostly clear days.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January typically offers the best weather for Chennai.
Chennai Temperature in September
Min Temperature
27°C (81°F)
Max Temperature
33°C (91°F)
Chance of Rain
22%
Precipitation
112 mm (4.4 in)
Rainy days
7 days
Humidity
71%
Sunshine
198 hours
Percentage Sunshine
Chennai Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Chennai - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Chennai typically stay consistent throughout September, with daily highs averaging around 33°C (91°F). Nights are warm, with lows around 26°C (79°F).
Average temperatures in September
Daily Historical Precipitation
49-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in September
Historical weather records for Chennai in September
Browse day-by-day weather records for Chennai spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Chennai historical weather extremes in September
Based on weather observations in Chennai between 2004 and 2026, these are the recorded extremes during September.
- On September 14, 2009, temperatures climbed to 38°C (100°F), marking the warmest September day on record.
- The coldest September day was on September 11, 2013, with a maximum of 27°C (81°F).
- Nighttime temperatures dropped to 22°C (72°F) on September 19, 2018, marking the coldest September night on record.
Best Places in India in September
Find out more about the weather in India and which places have the best travel conditions in this month. See all of India in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Chennai in September
Get ready for hot weather in September! Lightweight, breathable fabrics are your best friend during this month. Cotton and linen shirts, shorts, sundresses, and sandals will keep you comfortable. Light colors help reflect the heat, avoid wearing black. High rain levels are expected, so pack waterproof gear and an umbrella or poncho. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Chennai in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Chennai 3-Day Forecast
More climate data for Chennai
Temperature Rainfall Sunshine Humidity
See the full Chennai climate overview or explore weather in India.
Popular in September
Where to go in September - average daytime high across popular destinations.
Jaipur
35°C (95°F) Gurugram35°C (95°F) New Delhi
35°C (95°F) Chennai33°C (91°F) Hyderabad
31°C (88°F) Bengaluru29°C (84°F) Mumbai
30°C (86°F) Kochi28°C (82°F) Bucket list
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