Johannesburg Weather in January
What's the weather like in Johannesburg (Gauteng) in January 2025?
The climate in Johannesburg during January can be summarized as warm and wet.
January is in the summer in Johannesburg and is typically the warmest month of the year. Daytime maximum temperatures average around a comfortable 26°C (80°F), whilst at night 15°C (59°F) is normal.
| Daytime temperature | 26.4°C 79.5°F |
|---|---|
| Nightly temperature | 15.2°C 59.4°F |
| Average temperature | 20.8°C 69.4°F |
| Daily sunshine | 8.8 hrs |
| Avg rainfall | 135 mm 5.3 ins |
| Rainy days | 14 days |
| Sea temperature | 24.7°C 76.4°F |
| Humidity | 66% |
| Windspeed | 9kph 6 mph |
On average January is the wettest month of the year in Johannesburg with around 135mm 5.3 inches of rain making it a wet time to visit. This rainfall is typically spread over 14 days, although this may vary considerably.
On the flip side this corresponds to an average of 8.8 hours of sunshine per day.
January temperatures in Johannesburg
January rainfall
January hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Johannesburg in January 2024.
Other monthly averages
Best places to visit in January
Johannesburg weather stats
| Hottest month: | January | 26.1°C 79°F |
|---|---|---|
| Driest month: | July | 4mm 0.2ins |
| Sunniest month: | July | 10hrs |
| Coldest month: | June | 16.4°C 61.5°F |
| Wettest month: | January | 135mm 5.3ins |
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