Climate averages 1991–2020
Heidelberg, South Africa 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 Heidelberg, South Africa: daytime highs average 17.8°C and nights cool to about 3.0°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 3.3 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 Nigel (14 km away). In July its highs average 17.6°C, about as warm as Heidelberg, South Africa, with 3.9 mm of rain.
Among the 95 cities listed in South Africa, Heidelberg, South Africa ranks joint 51st of 95 for the warmest July highs and 28th of 95 for the driest July (rainfall, lowest first). The mean July high of those 95 cities is 18.5°C; Heidelberg, South Africa is 0.8°C cooler than that mean.
From July to August, average highs rise by 3.2°C to 21.0°C, and monthly rainfall rises from 3.3 mm to 11 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
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, selected | 17.8°C3.0°C | 3.0°C | 3.3 | 0.7 | 10.611 h |
| August | 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
July in nearby cities
- Nigel in JulySouth Africa · 14 kmHigh 17.6°C · Low 2.9°C · 3.9 mm rain
- Tokoza in JulySouth Africa · 28 kmHigh 17.6°C · Low 2.9°C · 3.1 mm rain
- Brakpan in JulySouth Africa · 30 kmHigh 17.3°C · Low 2.8°C · 3.1 mm rain
- Alberton in JulySouth Africa · 35 kmHigh 17.5°C · Low 3.0°C · 3.0 mm rain
- Benoni in JulySouth Africa · 35 kmHigh 17.2°C · Low 2.8°C · 3.1 mm rain
- Germiston in JulySouth Africa · 38 kmHigh 17.3°C · Low 2.9°C · 3.1 mm rain
- Etwatwa in JulySouth Africa · 43 kmHigh 17.6°C · Low 3.3°C · 3.7 mm rain
- Johannesburg in JulySouth Africa · 46 kmHigh 16.3°C · Low 2.2°C · 3.0 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.