Port Blair climate by month
Averages and records for each calendar month at Port Blair, India, from 1961 to 2026. The warmest month is April, averaging 32.6°C; the coolest is September at 29.4°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 30.0°C | 23.1°C | 32.1°C26 January 2010 | 10.0°C4 January 1974 | 27 / 56 |
| February | 30.8°C | 23.1°C | 34.1°C28 February 2009 | 13.7°C23 February 1989 | 24 / 55 |
| March | 31.7°C | 23.5°C | 36.0°C18 March 2015 | 16.0°C1 March 1977 | 25 / 55 |
| April | 32.6°C | 24.8°C | 39.0°C14 April 1973 | 19.0°C9 April 1978 | 26 / 56 |
| May | 31.3°C | 24.7°C | 38.4°C30 May 1987 | 20.0°C6 May 1978 | 31 / 56 |
| June | 29.9°C | 24.4°C | 37.0°C2 June 1979 | 18.0°C9 June 1978 | 22 / 54 |
| July | 29.7°C | 24.6°C | 32.1°C6 July 2014 | 15.6°C9 July 1987 | 24 / 55 |
| August | 29.6°C | 24.1°C | 32.7°C27 August 2020 | 18.0°C19 August 1977 | 26 / 54 |
| September | 29.4°C | 23.2°C | 34.8°C1 September 2005 | 18.8°C8 September 1989 | 22 / 56 |
| October | 30.3°C | 23.9°C | 34.0°C2 October 1999 | 18.0°C26 October 1977 | 26 / 55 |
| November | 30.6°C | 24.2°C | 34.0°C4 November 2007 | 18.3°C16 November 1989 | 23 / 54 |
| December | 30.0°C | 24.0°C | 32.6°C4 December 2011 | 15.0°C5 December 1974 | 27 / 55 |
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 22 to 31 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.