Climate averages 1991–2020
Heidelberg, South Africa weather
in August.
A mild, very dry month: the 9th warmest and the 3rd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
August is a mild month in Heidelberg, South Africa: daytime highs average 21.0°C and nights cool to about 5.9°C. By daytime temperature it is the 9th warmest of the 12 months.
Expect about 11 mm of rain on roughly 2 days, which makes August a very dry month (the 3rd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 11 h 11 min on an average August day.
The nearest other city in this atlas is Nigel (14 km away). In August its highs average 20.8°C, about as warm as Heidelberg, South Africa, with 12 mm of rain.
Among the 95 cities listed in South Africa, Heidelberg, South Africa ranks joint 46th of 95 for the warmest August highs and joint 36th of 95 for the driest August (rainfall, lowest first). The mean August high of those 95 cities is 21.0°C; Heidelberg, South Africa is level with that mean.
From August to September, average highs rise by 4.1°C to 25.1°C, and monthly rainfall rises from 11 mm to 22 mm.
The annual picture
August 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
Heidelberg, South Africa climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 25.7°C15.4°C | 15.4°C | 130 | 16.0 | 13.614 h |
| February | 25.5°C15.2°C | 15.2°C | 100 | 12.8 | 13.013 h |
| March | 24.3°C13.6°C | 13.6°C | 84 | 11.4 | 12.312 h |
| April | 22.0°C10.6°C | 10.6°C | 41 | 6.8 | 11.511 h |
| May | 19.9°C6.9°C | 6.9°C | 15 | 2.7 | 10.811 h |
| June | 17.6°C3.8°C | 3.8°C | 7.4 | 1.5 | 10.511 h |
| July | 17.8°C3.0°C | 3.0°C | 3.3 | 0.7 | 10.611 h |
| August, selected | 21.0°C5.9°C | 5.9°C | 11 | 2.1 | 11.211 h |
| September | 25.1°C9.8°C | 9.8°C | 22 | 3.6 | 11.912 h |
| October | 25.9°C12.3°C | 12.3°C | 78 | 10.5 | 12.713 h |
| November | 25.5°C13.5°C | 13.5°C | 101 | 13.8 | 13.413 h |
| December | 25.7°C15.0°C | 15.0°C | 140 | 16.9 | 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
August in nearby cities
- Nigel in AugustSouth Africa · 14 kmHigh 20.8°C · Low 5.7°C · 12 mm rain
- Tokoza in AugustSouth Africa · 28 kmHigh 20.8°C · Low 5.7°C · 10 mm rain
- Brakpan in AugustSouth Africa · 30 kmHigh 20.5°C · Low 5.5°C · 10 mm rain
- Alberton in AugustSouth Africa · 35 kmHigh 20.7°C · Low 5.7°C · 9.8 mm rain
- Benoni in AugustSouth Africa · 35 kmHigh 20.4°C · Low 5.5°C · 10 mm rain
- Germiston in AugustSouth Africa · 38 kmHigh 20.5°C · Low 5.6°C · 10 mm rain
- Etwatwa in AugustSouth Africa · 43 kmHigh 20.7°C · Low 5.9°C · 11 mm rain
- Johannesburg in AugustSouth Africa · 46 kmHigh 19.4°C · Low 4.9°C · 9.8 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 Heidelberg) is explained once on the Heidelberg, South Africa year overview and on the Sources, method and limits page.