Monthly Climate
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Best time to visit Chennai

January is the best time to visit Chennai for general sightseeing, with average highs of 28 °C and about 3 wet days. The comfortable season runs roughly December to February.

It depends what you are going for

One month rarely wins on everything. These are the best months on each measure taken on its own.

If you want Best month On that measure
Sightseeing and walking January comfort 80/100
A beach holiday January sea 27 °C
The least cloud March 33 % average cloud cover
The least rain February 7 mm
Warmth May 36 °C
Cooler weather December 27 °C

Ranked by comfort

# Month Comfort / 100 Avg high Wet days Beach
1 January 80 28 °C 3 100
2 February 74 30 °C 2 96
3 December 72 27 °C 9 87
4 March 63 33 °C 1 85
5 November 56 28 °C 17 71
6 April 52 34 °C 3 76
7 October 47 31 °C 19 64
8 May 45 36 °C 3 68
9 August 44 33 °C 15 58
10 September 43 33 °C 17 59
11 July 43 34 °C 13 57
12 June 43 36 °C 10 59

For a beach holiday

January scores highest, with a sea temperature of 27 °C and air temperatures around 28 °C. The sea never reaches 20 °C here.

Month Sea Air Sunshine Beach score
January 27 °C 28 °C 45 % 100
February 27 °C 30 °C 35 % 96
March 28 °C 33 °C 33 % 85
April 29 °C 34 °C 40 % 76
May 29 °C 36 °C 53 % 68
June 29 °C 36 °C 83 % 59
July 29 °C 34 °C 90 % 57
August 29 °C 33 °C 86 % 58
September 29 °C 33 °C 76 % 59
October 29 °C 31 °C 71 % 64
November 28 °C 28 °C 66 % 71
December 27 °C 27 °C 58 % 87

When to think twice

June scores lowest with about 10 wet days and highs near 36 °C. That does not make it a bad month — it depends entirely on what you are travelling for. The numbers are all here; the judgement is yours.

The full year

Month Avg high Rainfall Cloud
January 27.9 °C 15 mm 45 %
February 30.0 °C 7 mm 35 %
March 32.5 °C 9 mm 33 %
April 34.4 °C 15 mm 40 %
May 36.4 °C 38 mm 53 %
June 35.5 °C 65 mm 83 %
July 34.2 °C 70 mm 90 %
August 33.3 °C 98 mm 86 %
September 32.6 °C 109 mm 76 %
October 30.6 °C 215 mm 71 %
November 28.5 °C 225 mm 66 %
December 27.4 °C 116 mm 58 %

Data sources and method

Normal period
1991–2020
Dataset version
era5-1991-2020-scores1.1
Last processed

Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: comfort score, beach score, season boundaries. Full formulas are on the methodology page.

Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.