POSTMASBURG weather by month
Averages and records for each calendar month at POSTMASBURG, South Africa, from 1998 to 2025. The warmest month is December, averaging 34.2°C; the coolest is June at 21.1°C.
| Month | Avg high | Avg low | Record high | Record low | Years |
|---|---|---|---|---|---|
| January | 34.1°C | 17.3°C | 40.9°C5 January 2016 | 6.5°C9 January 2003 | 16 / 27 |
| February | 33.0°C | 16.9°C | 40.0°C5 February 2018 | 7.9°C16 February 2024 | 13 / 24 |
| March | 31.0°C | 14.7°C | 38.9°C5 March 2018 | 4.4°C28 March 2002 | 16 / 27 |
| April | 27.6°C | 10.9°C | 37.1°C4 April 2017 | −0.4°C28 April 2011 | 16 / 25 |
| May | 24.4°C | 6.7°C | 33.1°C10 May 2021 | −4.3°C31 May 2009 | 14 / 28 |
| June | 21.1°C | 2.7°C | 31.5°C1 June 2017 | −7.5°C16 June 2010 | 15 / 27 |
| July | 21.1°C | 2.0°C | 29.4°C12 July 2017 | −7.5°C22 July 2021 | 17 / 27 |
| August | 23.5°C | 3.5°C | 31.7°C24 August 2012 | −6.0°C17 August 2001 | 15 / 27 |
| September | 27.7°C | 7.5°C | 37.5°C12 September 2017 | −3.0°C6 September 2005 | 15 / 27 |
| October | 30.8°C | 11.5°C | 39.4°C27 October 2018 | −1.2°C4 October 2006 | 17 / 27 |
| November | 32.7°C | 13.5°C | 40.4°C14 November 2018 | 1.9°C14 November 2011 | 17 / 27 |
| December | 34.2°C | 15.7°C | 40.9°C11 December 2024 | 4.7°C11 December 2003 | 16 / 27 |
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 17 years each.
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Climate at nearby stations
The closest stations with twelve months of archive of their own, nearest first.
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.