Climate averages 1991–2020
Westonaria weather
in July.
A mild, very dry month: the 11th warmest and the driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a mild month in Westonaria: daytime highs average 17.2°C and nights cool to about 3.2°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 3.2 mm of rain on fewer than one day, which makes July a very dry month (the driest month of the year). Daylight, from sunrise to sunset, lasts about 10 h 39 min on an average July day.
The nearest other city in this atlas is Randfontein (16 km away). In July its highs average 16.5°C, 0.7°C cooler than Westonaria, with 3.2 mm of rain.
Among the 95 cities listed in South Africa, Westonaria ranks joint 76th of 95 for the warmest July highs and joint 21st of 95 for the driest July (rainfall, lowest first). The mean July high of those 95 cities is 18.5°C; Westonaria is 1.3°C cooler than that mean.
From July to August, average highs rise by 3.2°C to 20.4°C, and monthly rainfall rises from 3.2 mm to 9.7 mm.
The annual picture
July in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Westonaria climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.5°C15.5°C | 15.5°C | 132 | 16.9 | 13.614 h |
| February | 25.2°C15.2°C | 15.2°C | 118 | 14.4 | 13.013 h |
| March | 23.9°C13.7°C | 13.7°C | 90 | 12.8 | 12.312 h |
| April | 21.6°C10.6°C | 10.6°C | 45 | 7.3 | 11.511 h |
| May | 19.5°C7.2°C | 7.2°C | 18 | 3.1 | 10.811 h |
| June | 17.1°C4.0°C | 4.0°C | 8.1 | 1.4 | 10.511 h |
| July, selected | 17.2°C3.2°C | 3.2°C | 3.2 | 0.8 | 10.711 h |
| August | 20.4°C6.0°C | 6.0°C | 9.7 | 1.9 | 11.211 h |
| September | 24.6°C9.7°C | 9.7°C | 21 | 3.4 | 11.912 h |
| October | 25.7°C12.3°C | 12.3°C | 73 | 10.4 | 12.713 h |
| November | 25.4°C13.6°C | 13.6°C | 99 | 13.9 | 13.413 h |
| December | 25.5°C15.1°C | 15.1°C | 141 | 18.4 | 13.814 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Randfontein in JulySouth Africa · 16 kmHigh 16.5°C · Low 2.8°C · 3.2 mm rain
- Soweto in JulySouth Africa · 22 kmHigh 16.9°C · Low 2.9°C · 3.2 mm rain
- Carletonville in JulySouth Africa · 25 kmHigh 17.6°C · Low 3.0°C · 3.5 mm rain
- Roodepoort in JulySouth Africa · 28 kmHigh 16.4°C · Low 2.3°C · 3.2 mm rain
- Krugersdorp in JulySouth Africa · 29 kmHigh 16.5°C · Low 2.5°C · 2.7 mm rain
- Evaton in JulySouth Africa · 31 kmHigh 17.8°C · Low 3.0°C · 3.1 mm rain
- Johannesburg in JulySouth Africa · 41 kmHigh 16.3°C · Low 2.2°C · 3.0 mm rain
- Randburg in JulySouth Africa · 43 kmHigh 17.4°C · Low 3.1°C · 2.5 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Westonaria) is explained once on the Westonaria year overview and on the Sources, method and limits page.
Soweto, Roodepoort and Randfontein lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.