Westonaria climate
Westonaria is warmest in October, with average highs of 26 °C, and coldest in July, when nights average 3.1 °C. December is the wettest month (135 mm) and July the driest (3.0 mm). Figures are 1991–2020 climate normals.
Across a full year Westonaria averages 728 mm of rain, 117 days above 25 °C and 7 days below freezing.
South Africa · population 156,831 · 1991–2020 normals
Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month
- Warmest month October 26 °C
- Coldest month July 3.1 °C
- Driest month July 3 mm
- Wettest month December 135 mm
- Least cloud July 12 % cloud
- Hottest on record January 37 °C
- Coldest on record June -4.4 °C
What to expectWestonaria through the year
Westonaria has a clear annual cycle: average daily highs run from 17 °C in July to 26 °C in October, a swing of 11 °C in mean temperature across the year.
Counted across a normal year, 117 days a year reach 25 °C, 13 of them reach 30 °C, 7 nights drop below freezing. The warmest reading in the 1991–2020 record is 37 °C, in January.
Rain is strongly seasonal. December averages 135 mm against 3 mm in July — 45 times as much. Planning around the dry months matters more here than planning around temperature.
Month by month
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 25.6 °C | 124 mm | 51 % |
| February | 25.3 °C | 115 mm | 48 % |
| March | 24.0 °C | 87 mm | 42 % |
| April | 21.7 °C | 43 mm | 36 % |
| May | 19.5 °C | 18 mm | 21 % |
| June | 17.1 °C | 8 mm | 15 % |
| July | 17.2 °C | 3 mm | 12 % |
| August | 20.4 °C | 10 mm | 16 % |
| September | 24.5 °C | 21 mm | 23 % |
| October | 25.7 °C | 70 mm | 39 % |
| November | 25.4 °C | 94 mm | 49 % |
| December | 25.6 °C | 135 mm | 54 % |
Temperature month by month
| Month | Avg high | Avg low | Mean | Record high | Record low | Days above 25 °C | Days above 30 °C | Days below 0 °C |
|---|---|---|---|---|---|---|---|---|
| January | 25.6 °C | 15.4 °C | 20.3 °C | 37.0 °C | 7.6 °C | 17 | 2 | 0 |
| February | 25.3 °C | 15.1 °C | 20.0 °C | 32.8 °C | 8.8 °C | 15 | 1 | 0 |
| March | 24.0 °C | 13.6 °C | 18.6 °C | 30.8 °C | 5.6 °C | 11 | 0 | 0 |
| April | 21.7 °C | 10.5 °C | 15.9 °C | 28.4 °C | 1.3 °C | 3 | 0 | 0 |
| May | 19.5 °C | 7.0 °C | 13.0 °C | 27.8 °C | -3.9 °C | 1 | 0 | 0 |
| June | 17.1 °C | 3.9 °C | 10.0 °C | 24.5 °C | -4.4 °C | 0 | 0 | 2 |
| July | 17.2 °C | 3.1 °C | 9.8 °C | 24.5 °C | -4.2 °C | 0 | 0 | 4 |
| August | 20.4 °C | 5.8 °C | 12.9 °C | 28.3 °C | -4.4 °C | 2 | 0 | 1 |
| September | 24.5 °C | 9.6 °C | 17.0 °C | 31.9 °C | -0.7 °C | 15 | 1 | 0 |
| October | 25.7 °C | 12.1 °C | 18.8 °C | 34.3 °C | 3.8 °C | 18 | 4 | 0 |
| November | 25.4 °C | 13.4 °C | 19.3 °C | 35.1 °C | 4.3 °C | 17 | 3 | 0 |
| December | 25.6 °C | 14.9 °C | 20.1 °C | 34.9 °C | 5.0 °C | 18 | 2 | 0 |
Rain, sun and wind month by month
| Month | Rainfall | Wet days | Daylight | Cloud cover | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 124 mm | 16 | 14 h/day | 51 % | 69 % | 17 km/h |
| February | 115 mm | 13 | 13 h/day | 48 % | 69 % | 16 km/h |
| March | 87 mm | 12 | 12 h/day | 42 % | 69 % | 15 km/h |
| April | 43 mm | 7 | 11 h/day | 36 % | 65 % | 15 km/h |
| May | 18 mm | 3 | 11 h/day | 21 % | 56 % | 15 km/h |
| June | 8 mm | 1 | 11 h/day | 15 % | 54 % | 16 km/h |
| July | 3 mm | 1 | 11 h/day | 12 % | 49 % | 16 km/h |
| August | 10 mm | 2 | 11 h/day | 16 % | 44 % | 18 km/h |
| September | 21 mm | 3 | 12 h/day | 23 % | 41 % | 20 km/h |
| October | 70 mm | 10 | 13 h/day | 39 % | 51 % | 20 km/h |
| November | 94 mm | 13 | 13 h/day | 49 % | 59 % | 20 km/h |
| December | 135 mm | 18 | 14 h/day | 54 % | 67 % | 18 km/h |
How Westonaria compares
The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.
| Destination | Summer high | Winter low | Rain per year | Days above 25 °C |
|---|---|---|---|---|
| Westonaria | 26 °C | 3.1 °C | 728 mm | 117 |
| Soweto · South Africa | 25 °C | 2.8 °C | 729 mm | 102 |
| Carletonville · South Africa | 26 °C | 2.9 °C | 705 mm | 135 |
| Krugersdorp · South Africa | 25 °C | 2.6 °C | 664 mm | 92 |
| Evaton · South Africa | 26 °C | 2.8 °C | 731 mm | 136 |
| Johannesburg · South Africa | 25 °C | 2.4 °C | 731 mm | 87 |
| Vereeniging · South Africa | 27 °C | 2.7 °C | 708 mm | 151 |
Where Westonaria ranks
| Ranking | Position | Value |
|---|---|---|
| Places with the best weather in Africa in April | 25th of 50 | 94/100 |
Planning a trip? See the best time to visit Westonaria.
QuestionsCommon questions about Westonaria’s climate
When is the best time to visit Westonaria?
That depends on what you want, so the honest answer is a comparison rather than a single month. January, February, December sit closest to 20 °C on average, October is the warmest month and July the driest. The month-by-month table above has the full picture.
How hot does Westonaria get?
In October, the warmest month, daily highs average 26 °C. About 13 days a year pass 30 °C. The highest value in the 1991–2020 record is 37 °C.
How cold does it get in winter?
Nights average 3.1 °C in July, the coldest month. A normal year has 7 nights below freezing.
Which month is wettest in Westonaria?
December, averaging 135 mm over 18 days with rain. The driest month is July with 3 mm. The year as a whole averages 728 mm.
Are these figures a forecast?
No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Westonaria rather than what any particular week will bring. Individual years can differ substantially from the normal.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Data point
- -26.319°, 27.649° (the coordinates the reanalysis values are taken for)
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.