Experience the unique contrasts of Johannesburg's weather, where summers (October to March) offer warm temperatures averaging 24°C (75°F), while winters (May to August) are mild with lows around 8°C (46°F). Interestingly, Johannesburg receives more than half of its annual rainfall in summer months. For a memorable blend of city and nature, visit the Magaliesberg Mountain Range during autumn (April to May), offering crisp air and picturesque foliage.
Today's Forecast
5-Day Forecast
Johannesburg Climate & Weather Averages
Johannesburg is warmest in October, when daytime highs average 26°C, and coldest in June at around 17°C. The wettest month is January. The table below shows the monthly averages for Johannesburg, based on recorded data from 2015–2024.
| Month | Avg High | Avg Low | Rainfall |
|---|---|---|---|
| Jan | 26° | 15° | 117 mm |
| Feb | 25° | 14° | 104 mm |
| Mar | 24° | 13° | 61 mm |
| Apr | 21° | 10° | 57 mm |
| May | 20° | 7° | 16 mm |
| Jun | 17° | 4° | 8 mm |
| Jul | 17° | 4° | 4 mm |
| Aug | 21° | 7° | 3 mm |
| Sep | 25° | 10° | 14 mm |
| Oct | 26° | 12° | 39 mm |
| Nov | 26° | 13° | 77 mm |
| Dec | 26° | 15° | 108 mm |
Best time to visit: March–October offers the most comfortable conditions, with daytime highs around 24°C. Pack light, breathable layers and a light waterproof — Johannesburg sees rain year-round, peaking in January. For the coldest spell around June, bring a warm coat.
Source: Open-Meteo ERA5 archive. Averages computed from daily records.