Chennai
Elevation 6 m13.08° N, 80.28° E
When to go?
Mean 25 °C, 2 rain days in the month (18 mm).
Good for
- Ideal for the seawater at 27 °C
Against
- Hothighs of 29 °C
Mean 26 °C, 1 rain day in the month (7 mm).
Good for
- Ideal for the seawater at 27 °C
Against
- Hothighs of 31 °C
Mean 29 °C, 1 rain day in the month (8 mm).
Good for
- Ideal for the seawater at 29 °C
Against
- Hothighs of 34 °C
Mean 31 °C, 1 rain day in the month (15 mm).
Good for
- Ideal for the seawater at 30 °C
Against
- Hothighs of 36 °C
Mean 33 °C, 3 rain days in the month (42 mm).
Good for
- Ideal for the seawater at 30 °C
Against
- Extreme heathighs of 38 °C
Mean 32 °C, 6 rain days in the month (81 mm).
Against
- Extreme heatnights at 29 °C
Mean 31 °C, 8 rain days in the month (104 mm).
Against
- Hothighs of 35 °C
Mean 30 °C, 9 rain days in the month (127 mm).
Against
- Hothighs of 34 °C
Mean 30 °C, 10 rain days in the month (134 mm).
Against
- Hothighs of 34 °C
Mean 28 °C, 12 rain days in the month (253 mm).
Good for
- Ideal for the seawater at 29 °C
Against
- Hothighs of 32 °C
Mean 27 °C, 11 rain days in the month (292 mm).
Good for
- Ideal for the seawater at 28 °C
Against
- Hothighs of 30 °C
Mean 26 °C, 6 rain days in the month (139 mm).
Good for
- Ideal for the seawater at 27 °C
Against
- Hothighs of 29 °C
No ideal month: the best months are January–February, the least hot. Ideal for the sea: October–May. Avoid March–December (hot, at times extreme heat).
What is the climate like?
Temperature and rain
Monthly min and max temperature (°C)
Monthly min and max temperature (°C)
How much it rains
Rain days and how much water
Rain days and how much water
Bars: length = rain days, thickness = mm on a rain day, area = the month's rain. 3 mm a day7 mm a day15 mm a day
Colour = the month's rain: 103060100160250400mm
Daylight hours
Daylight and sky: sunrise, sunset and cloud cover
daylight under a clear sky (average share)daylight under cloud
daylight under a clear sky (average share)daylight under cloud
Times on the 15th of each month, in local time: daylight saving where and when it applies, standard time in the other months.
Sea temperature: Bay of Bengal
Monthly mean sea temperature: Bay of Bengal (°C)
Monthly mean sea temperature: Bay of Bengal (°C)
Effect of climate change
Today's climate (1996–2025) compared with 1961–1990:
In short
Year by year
Temperature of each year
Against 1961–1990 the mean temperature of today (1996–2025) has changed by +0.2 °C; in the last ten years by +0.3 °C. Warmest year: 1952 (+0.9 °C), coldest: 1956 (−0.7 °C).
January and October warmed the most (+0.6 and +0.4 °C), June the least (−0.2 °C).
Warming stripes: after an idea by Ed Hawkins (University of Reading), showyourstripes.info, CC BY 4.0.
Rain of each year (% against 1961–1990)
more rain than in 1961–1990less rain
Rain in a year: +3 % every ten years.
The sea, then and now
+0.3 °Cthe sea today, compared with 1961–1990