Chennai, India experiences average highs of 32°C (90°F) and lows of 25°C (77°F) throughout the year. Rainfall is moderate, averaging about 10 rainy days per month. Sunshine is abundant, averaging about 10 hours per day. Average highs have stayed broadly stable across the available records.
Chennai, India Weather & Climate 2026
Monthly climate averages for Chennai, India. Based on 10-year ERA5 reanalysis data.
Climate Overview
Drier season: Jan–Dec 
Wetter season: Jun–Nov At-a-Glance Climate Summary
Live Weather & Air Quality
Key figures
Climate Score
4.3/10
Best: January, February, December
UV Index
8
High
Temperature 32°C / 25°C
Feels Like 36°C / 28°C
Rainy Days 10
Rainfall 95 mm
Sunshine 10 h
Humidity 74%
Wind Speed 18 km/h
Dew Point 23°C
Hottest Month
36°C
May
Avg Low28°C
Rain5days
Coldest Month
21°C
January
Avg High28°C
Rain5days
Driest Month
1days
February
Avg High30°C
Avg Low21°C
Windiest Month
20 km/h
May (Gusts 35)
Sea Temperature
27°C – 31°C
Warmest water: May (
31°C
)
Worst Time to Visit
Consider avoiding May, June, September, October due to extreme heat, frequent rain, oppressive humidity.
Sun Position
Sunrise 05:44
Daylight 12.9h
Sunset 18:37
Live conditions—
Chennai on the map · live conditions
Chennai, India
- Continent
- Asia
- Country
- India
- City
- Chennai
- Population
- 4.7M
- Coordinates
- 13.09°, 80.28°
Seasonal Breakdown
Spring
Mar–May
Avg High 35°C
Avg Low 26°C
Rain 3 days/mo
Summer
Jun–Aug
Avg High 34°C
Avg Low 27°C
Rain 15 days/mo
Autumn
Sep–Nov
Avg High 31°C
Avg Low 25°C
Rain 18 days/mo
Winter
Dec–Feb
Avg High 29°C
Avg Low 22°C
Rain 5 days/mo
3/3 best months
Climate Charts
Based on historical averages (2016–2025)
Monthly Temperatures
HighLowShaded bands show the typical range across the available yearly records.
Line chart showing monthly temperatures. Jan: 28°C / 21°C . Feb: 30°C / 21°C . Mar: 33°C / 24°C . Apr: 35°C / 26°C . May: 36°C / 28°C . Jun: 35°C / 28°C . Jul: 33°C / 27°C . Aug: 33°C / 26°C . Sep: 32°C / 26°C . Oct: 31°C / 25°C . Nov: 29°C / 24°C . Dec: 28°C / 23°C .
Monthly Rainfall
Rainfall
Bar chart showing monthly rainfall. Jan: 29 mm. Feb: 5 mm. Mar: 7 mm. Apr: 6 mm. May: 69 mm. Jun: 71 mm. Jul: 108 mm. Aug: 106 mm. Sep: 104 mm. Oct: 172 mm. Nov: 313 mm. Dec: 148 mm.
Monthly Humidity
Humidity
Line chart showing monthly humidity. Jan: 76%. Feb: 74%. Mar: 74%. Apr: 73%. May: 70%. Jun: 66%. Jul: 68%. Aug: 72%. Sep: 75%. Oct: 80%. Nov: 83%. Dec: 79%.
Monthly Wind Speed
Wind SpeedGusts
Bar chart showing monthly wind speed. Jan: 16 km/h . Feb: 16 km/h . Mar: 17 km/h . Apr: 19 km/h . May: 20 km/h . Jun: 20 km/h . Jul: 19 km/h . Aug: 18 km/h . Sep: 17 km/h . Oct: 15 km/h . Nov: 19 km/h . Dec: 20 km/h .
Sunshine
Sunshine
Sunshine: Jan: 10h. Feb: 11h. Mar: 11h. Apr: 11h. May: 11h. Jun: 9h. Jul: 8h. Aug: 9h. Sep: 9h. Oct: 9h. Nov: 8h. Dec: 9h.
Sea Temperature
Sea Temperatureswim
Line chart showing monthly sea temperature. Jan: 27°C . Feb: 28°C . Mar: 29°C . Apr: 31°C . May: 31°C . Jun: 31°C . Jul: 30°C . Aug: 30°C . Sep: 30°C . Oct: 30°C . Nov: 29°C . Dec: 27°C .
UV Index
UV Index
Bar chart showing monthly UV index. Jan: UV 7. Feb: UV 8. Mar: UV 9. Apr: UV 9. May: UV 8. Jun: UV 8. Jul: UV 7. Aug: UV 8. Sep: UV 8. Oct: UV 8. Nov: UV 6. Dec: UV 6.
Monthly Daylight Hours
Daylight12h reference
Monthly Dew Point & Comfort
Dew Point Dry Comfortable Humid Muggy
Climate Trends
Average highs have stayed broadly stable across the available records. Average rainfall has remained broadly steady.
2016 to 2025
Avg high Avg rainfall
Climate summary
| Last 12 months | All years | |
|---|---|---|
| Hottest month | Jun 2025 · 36°C | May · 36°C |
| Coldest month | Feb 2025 · 21°C | Jan · 21°C |
| Wettest month | Oct 2025 · 250 mm | Nov · 313 mm |
| Windiest month | Jun 2025 · 21 km/h | May · 20 km/h |
Month-by-Month Weather Table
January best
Excellent 
February best
Excellent March
Fair April
Poor May
Poor June
Poor July
Poor August
Poor September
Poor October
Wet November
Wet December best
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 |
Compare Nearby City Climates
Frequently Asked Questions
The best months to visit Chennai are January, February, December, when temperatures are comfortable and rainfall is at its lowest. This is based on 10-year climate averages for Chennai, scoring temperature, rainfall, humidity, and sunshine hours.
The hottest month in Chennai is May, with average daytime highs of 36°C (96°F). Plan outdoor activities for early morning or late afternoon if visiting during this period.
The coldest month in Chennai is January, with average overnight lows of 21°C (70°F). Pack warm layers and expect shorter daylight hours during this period.
The wettest month in Chennai is November, averaging 313mm of precipitation across 19 rainy days. An umbrella or waterproof jacket is essential.
The rainy season in Chennai runs through October, November, August, July, with the heaviest rainfall in October. Based on 10-year averages for Chennai.
Chennai receives approximately 114 sunshine hours per year. The sunniest month is April with around 11 hours. Based on climate data for Chennai.
The least favorable months to visit Chennai are May, June, September, October, primarily due to extreme heat, frequent rain, oppressive humidity. For the best conditions, consider January, February, December instead.
The annual average UV index in Chennai is 8, classified as high. SPF 30+ sunscreen, sunglasses, and seeking shade between 10:00–16:00 are strongly recommended.
Average humidity in Chennai is 74%, classified as moderate. Humidity levels are generally comfortable and should not affect outdoor activities for most people.
Yes — sea temperatures in January, February, March, April, May, June, July, August, September, October, November, December average 29°C (84°F), which is warm and comfortable for swimming and water activities.
Average wind speeds in Chennai are 18 km/h (11 mph). The windiest month is May with peak winds reaching 20 km/h (13 mph) (gusts up to 35 km/h / 22 mph).
Chennai averages 4 clear-sky days per month with overall cloud cover around 62%. The clearest skies occur in April.
The annual average dew point in Chennai is 23°C (73°F), which feels muggy and uncomfortable. Expect heavy perspiration during warmer months — stay hydrated and take breaks in air-conditioned spaces.
Chennai has a Tropical Monsoon climate, classified as Am under the Köppen system. Tropical climates are warm year-round with high rainfall and temperatures rarely dropping below 18°C (64°F).
The 'feels like' temperature in Chennai ranges from 28°C (82°F) to 36°C (97°F) on average. Humidity and radiant heat mean it often feels warmer than the thermometer reads, especially in summer months.
June is not the best time to visit Chennai, with a climate score of 1.6/10. Consider visiting during January, February, December instead for better conditions.
For June in Chennai, pack Umbrella, Waterproof jacket, Breathable clothing, Sunscreen (SPF 30+), Sun hat. With average highs of 35°C (95°F) and 13 rainy days, these essentials will keep you comfortable.
Data Source
Climate data derived from ERA5 reanalysis (ECMWF), averaged over 2016–2025. Sea surface temperature from marine reanalysis data. Climate scores and seasonal estimates are computed by WorldStats.
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