Colombo climate by month
Averages and records for each calendar month at Colombo, Sri Lanka, from 1956 to 2026. The warmest month is April, averaging 32.1°C; the coolest is August at 30.3°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 31.0°C | 23.7°C | 35.1°C27 January 2016 | 18.8°C13 January 2011 | 15 / 35 |
| February | 31.5°C | 24.0°C | 36.0°C9 February 1980 | 19.0°C1 February 1981 | 13 / 33 |
| March | 31.7°C | 24.8°C | 36.1°C17 March 2011 | 21.5°C29 March 2021 | 15 / 32 |
| April | 32.1°C | 25.7°C | 36.1°C28 April 1958 | 21.0°C5 April 1980 | 17 / 29 |
| May | 31.4°C | 26.2°C | 33.6°C4 May 2016 | 21.8°C13 May 2013 | 17 / 30 |
| June | 30.8°C | 26.2°C | 32.6°C23 June 2024 | 22.0°C10 June 1978 | 15 / 29 |
| July | 30.4°C | 26.2°C | 32.7°C3 July 2024 | 22.3°C21 July 2020 | 19 / 35 |
| August | 30.3°C | 26.0°C | 35.5°C21 August 2008 | 20.0°C16 August 1979 | 17 / 30 |
| September | 30.3°C | 25.3°C | 32.0°C16 September 1980 | 17.8°C26 September 1958 | 14 / 34 |
| October | 30.3°C | 24.8°C | 32.5°C28 October 2011 | 22.0°C31 October 1980 | 15 / 33 |
| November | 30.5°C | 23.9°C | 34.2°C30 November 2020 | 21.2°C30 November 2025 | 16 / 32 |
| December | 30.7°C | 23.8°C | 34.1°C31 December 2015 | 18.2°C28 December 2011 | 17 / 34 |
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 13 to 19 years each.
See what Colombo is doing right now
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.