Chennai, India — Weather in September 2026

Climate Overview

Chennai, India in September has hot conditions, with highs reaching 32.4°C (90°F) and afternoons the warmest part of the day. Rain falls on about 16 days this month, totalling around 104 mm. Sea temperature reaches 30°C (86°F).

This month falls at the beginning of Autumn. The combination of heat and frequent rain creates tropical monsoon conditions.

Temperatures remain fairly steady throughout September, with daily highs around 32°C (90°F).

September sees fairly even rainfall, totalling about 104 mm across the month.

Expect around 8.2h of sunshine at the start of September, increasing to 9.4h by the end.

The warmest days tend to fall around the 14th, averaging 32.9°C (91°F).

Monthly September Averages

Temperature

32°C / 26°C

Feels Like

38°C / 30°C

Rain

16 days · 104 mm

Sunshine

8.8h / day

Humidity

75% — Muggy

Wind

17 km/h

Wind Direction

SSW (211°)

Gusts

30 km/h

Daylight

12.2 h

Cloud Cover

79%

Clear Sky Days

0.9

UV Index

8.3 — Very High

Sea Temperature

30°C

Dew Point

24°C — Oppressive

Moon Phase

Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

HighLow

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 05:59

Daylight 12.2h

Sunset 18:12

What to Expect

With midday temperatures reaching 32°C (90°F), schedule outdoor activities for early morning or late afternoon. Evenings remain warm enough for comfortable outdoor dining and night markets. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Rain most often builds later in the day, so mornings are typically the driest window and afternoon showers are more likely.

1 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

1days (5 mm) Excellent

1days (7 mm) Excellent

2days (6 mm) Excellent

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January best	28°C / 21°C	31°C / 24°C	5days (29 mm) Good	9.9h Good	76% Humid	6.7 High	Excellent	View Details
February best	30°C / 21°C	33°C / 24°C	1days (5 mm) Excellent	10.5h Excellent	74% Muggy	8.2 Very High	Excellent	View Details
March	33°C / 24°C	37°C / 28°C	1days (7 mm) Excellent	11h Excellent	74% Muggy	9 Very High	Fair	View Details
April	35°C / 26°C	40°C / 32°C	2days (6 mm) Excellent	11.2h Excellent	73% Muggy	9.2 Very High	Poor	View Details
May	36°C / 28°C	41°C / 32°C	5days (69 mm) Good	10.5h Excellent	70% Muggy	8.2 Very High	Poor	View Details
June	35°C / 28°C	40°C / 31°C	13days (71 mm) Wet	9.3h Good	66% Muggy	7.7 Very High	Poor	View Details
July	33°C / 27°C	38°C / 30°C	16days (108 mm) Wet	8h Good	68% Muggy	7 High	Poor	View Details
August	33°C / 26°C	38°C / 30°C	17days (106 mm) Wet	8.5h Good	72% Muggy	7.7 Very High	Poor	View Details
September	32°C / 26°C	38°C / 30°C	16days (104 mm) Wet	8.8h Good	75% Muggy	8.3 Very High	Poor	View Details
October	31°C / 25°C	36°C / 29°C	19days (172 mm) Wet	9.2h Good	80% Humid	7.6 Very High	Wet	View Details
November	29°C / 24°C	32°C / 27°C	19days (313 mm) Wet	8.1h Good	83% Humid	6.3 High	Wet	View Details
December best	28°C / 23°C	30°C / 25°C	10days (148 mm) Wet	9.1h Good	79% Humid	6.1 High	Excellent	View Details

What to Wear

Light, breathable fabrics like cotton and linen are essential. Opt for loose-fitting clothing in light colors to stay cool.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

UmbrellaWaterproof jacketWaterproof shoesBreathable clothingSunscreen (SPF 30+)Sun hatSunglasses

Frequently Asked Questions

Expand all

Is September a good time to visit Chennai?

September is typically poor for visiting Chennai, with average highs of 32°C (90°F) and around 16 rainy days. Chennai, India in September has hot conditions, with highs reaching 32.4°C (90°F) and afternoons the warmest part of the

Does it rain a lot in Chennai in September?

Chennai typically sees around 16 rainy days in September with 104 mm (4.1 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Chennai in September?

Nights stay pleasantly warm in Chennai during September, around 26°C (79°F). Light evening wear is sufficient.

What should I pack for Chennai in September?

With highs of 32°C (90°F) and lows of 26°C (79°F) in September, we recommend: Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). Comfortable walking shoes are essential.

Is September among the best months weather-wise in Chennai?

September is not the most favourable month weather-wise in Chennai. Consider visiting during months with milder temperatures or less rainfall for a better experience.

What is the UV index in Chennai in September?

The average UV index in Chennai during September is 8 (very high). Strong sun protection is essential — SPF 50+, protective clothing, and avoid prolonged outdoor exposure during peak hours.

How many hours of daylight are there in Chennai in September?

Chennai gets approximately 12 hours of daylight per day in September, with around 9 hours of sunshine.

Does it snow in Chennai in September?

Snow is uncommon in Chennai during September based on 10-year climate averages.

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