Chennai Intl climate by month
Averages and records for each calendar month at Chennai Intl, India, from 1957 to 2025. The warmest month is May, averaging 38.3°C; the coolest is December at 29.0°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 29.5°C | 20.8°C | 34.8°C29 January 1998 | 12.0°C7 January 2002 | 32 / 58 |
| February | 31.5°C | 21.8°C | 38.0°C8 February 1981 | 15.0°C24 February 1974 | 30 / 59 |
| March | 33.9°C | 23.8°C | 41.3°C31 March 2021 | 18.2°C2 March 1989 | 43 / 58 |
| April | 35.8°C | 26.2°C | 42.6°C29 April 2006 | 20.0°C11 April 1981 | 36 / 58 |
| May | 38.3°C | 27.7°C | 44.6°C29 May 2003 | 21.6°C1 May 1996 | 39 / 55 |
| June | 37.5°C | 27.2°C | 43.2°C3 June 2003 | 20.0°C22 June 1976 | 36 / 55 |
| July | 35.7°C | 25.9°C | 40.4°C5 July 2015 | 20.6°C14 July 1985 | 37 / 55 |
| August | 34.8°C | 25.5°C | 39.6°C17 August 2004 | 20.1°C20 August 1983 | 39 / 57 |
| September | 34.4°C | 25.3°C | 39.2°C27 September 2002 | 20.3°C22 September 1990 | 36 / 56 |
| October | 32.3°C | 24.5°C | 40.0°C18 October 1977 | 20.0°C31 October 1974 | 32 / 56 |
| November | 30.1°C | 22.7°C | 38.6°C11 November 1992 | 17.2°C18 November 2012 | 32 / 57 |
| December | 29.0°C | 21.5°C | 33.1°C9 December 2010 | 17.0°C7 December 1981 | 33 / 57 |
Years shows the number behind the average high, then the number holding a record for that month. They differ because a year contributes an average only when the month has at least 25 days of readings, while a single reading is enough to set a record. The average low is withheld on the same 25-day rule and is counted separately again; it is shown as a dash where the archive cannot support it. Across the twelve months here the averages rest on 30 to 43 years each.
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Every figure on this page is computed from NOAA GHCN-Daily observations stored per station, per year, per month. Nothing is modelled, interpolated or estimated, and a month the archive never covered is left out rather than filled in. A station appears here only once all twelve months carry an average from at least 10 years. See how this is built.