Marion Island climate by month
Averages and records for each calendar month at Marion Island, South Africa, from 1952 to 2025. The warmest month is February, averaging 11.9°C; the coolest is August at 7.0°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 11.5°C | 4.9°C | 25.6°C8 January 2005 | −1.5°C24 January 2005 | 67 / 67 |
| February | 11.9°C | 5.4°C | 22.9°C10 February 1985 | −1.4°C28 February 1974 | 63 / 65 |
| March | 11.3°C | 5.0°C | 22.8°C25 March 2024 | −2.5°C27 March 2009 | 65 / 65 |
| April | 10.1°C | 3.8°C | 23.4°C18 April 2018 | −2.2°C27 April 1975 | 63 / 66 |
| May | 8.7°C | 2.7°C | 25.6°C5 May 2018 | −4.9°C14 May 2024 | 63 / 66 |
| June | 7.8°C | 2.0°C | 18.2°C4 June 2004 | −10.9°C23 June 2002 | 66 / 66 |
| July | 7.3°C | 1.6°C | 18.6°C7 July 2001 | −6.0°C8 July 1964 | 64 / 65 |
| August | 7.0°C | 1.2°C | 16.5°C28 August 2004 | −5.5°C9 August 1965 | 64 / 66 |
| September | 7.2°C | 1.3°C | 18.6°C24 September 2004 | −12.1°C26 September 2004 | 66 / 67 |
| October | 8.4°C | 2.1°C | 19.5°C31 October 2017 | −7.4°C2 October 2004 | 63 / 65 |
| November | 9.5°C | 2.9°C | 20.1°C12 November 2019 | −3.9°C11 November 2004 | 66 / 66 |
| December | 10.5°C | 4.0°C | 22.9°C13 December 2022 | −1.5°C21 December 1969 | 66 / 66 |
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 63 to 67 years each.
See what Marion Island 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.