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 records its highest temperatures in October — typically 26°C by day — and its lowest in June, around 17°C. Most rain falls in January; August stays driest. These averages are computed from ten years of daily records (2015–2024).
The weather in Johannesburg moves in moderate steps rather than leaps. Between the 26°C warmth of October and the 17°C chill of June lie long, mild shoulder seasons that many consider the best time to be here. Showers can turn up in any month — January most of all — so a light rain layer earns its place year-round.
| Month | Avg High | Avg Low | Rainfall | Sunshine (h/day) | Wind (km/h) |
|---|---|---|---|---|---|
| Jan | 26° | 15° | 117 mm | 11.6 | 17 |
| Feb | 25° | 15° | 104 mm | 11 | 17 |
| Mar | 24° | 13° | 61 mm | 10.7 | 16 |
| Apr | 21° | 10° | 57 mm | 10.1 | 16 |
| May | 20° | 7° | 16 mm | 9.8 | 15 |
| Jun | 17° | 4° | 8 mm | 9.8 | 16 |
| Jul | 17° | 4° | 4 mm | 10.2 | 17 |
| Aug | 21° | 7° | 3 mm | 10.6 | 20 |
| Sep | 25° | 10° | 14 mm | 11.2 | 21 |
| Oct | 26° | 12° | 39 mm | 11.1 | 21 |
| Nov | 26° | 13° | 77 mm | 11.5 | 21 |
| Dec | 26° | 15° | 108 mm | 11.3 | 19 |
Expect around 11.6 hours of sun a day at the January peak, against about 9.8 hours in May. Wind stays moderate most of the year, strongest in November with daily peaks near 21 km/h.
Best time to visit: Aim for April–October if you can: highs hover near 24°C and rain is lighter than the January peak. Light, breathable layers plus a light waterproof cover most days here.
Johannesburg weather — frequently asked questions
What is the sunniest month in Johannesburg?
January, with roughly 11.6 hours of sunshine a day on average over 2015–2024. The dimmest month is May, at about 9.8 hours.
When is the best time to visit Johannesburg?
Weather-wise, April–October is the sweet spot in Johannesburg: average daytime highs around 24°C with less rain than the January peak. Data from 2015–2024.
What is the rainiest month in Johannesburg?
January is on average the wettest month in Johannesburg, with about 117 mm of rainfall. The driest month is typically August, at around 3 mm.
Source: Open-Meteo ERA5 archive. Averages computed from daily records.