Weather in Johannesburg in January 2025
Average weather
Average temperature in Johannesburg in January
Going from a maximum of +30°C during the day to a minimum of +11°C during the night, the temperature in January averages around +27°C.
The average maximum temperature goes up 32% by the end of the month, compared with the beginning of the month, from +20°C to +26°C.
Is Johannesburg warm or cold in January?
Johannesburg is typically warm in January.
Maximum temperatures go up compared to the previous month from +25°C to +25°C. The minimum temperature also goes up from +14°C to +15°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
January is one of the warmest months in Johannesburg, here is the comparison with other months:
Climate in Johannesburg in January
| December | January | February | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +25°C | +25°C | +25°C | ||||
| Min. temperature | ||||||
| +5°C | +6°C | +9°C | ||||
| Max. temperature | ||||||
| +35°C | +37°C | +34°C | ||||
| Rainfall | ||||||
| 148 mm | 142 mm | 119 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 1 m/s | ||||
| Humidity | ||||||
| 70% | 72% | 72% | ||||
| Air pressure | ||||||
| 1015 HPa | 1014 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 3 | 4 | 5 | ||||
| Cloudy days | ||||||
| 4 | 3 | 3 | ||||
| Rainy days | ||||||
| 24 | 24 | 20 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
January weather is still as good as in December. The temperature levels stay the same in the area of +25°C for average maximum temperature during the day. As January arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 148 mm to 142 mm. Humidity rises from 70% to 72%. The average wind speed doesn’t change much during January, staying around 1 m/s. The good news is there are likely to be more sunny days in January, from 3 to 4.
February brings much the same weather, it remains good.
Wind
The average wind speed is 1 m/s getting up to 3 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Johannesburg is gradually increasing during January, going from 0 m/s to 1 m/s over the course of the month.
Rain
How was the weather last January in Johannesburg?
Climate Change over Years
The climate in Johannesburg in January has not changed much over the last 43 years.
The average temperature was the lowest in 2000 (+20°C) and the highest in 2015 (+25°C). The driest year was 2015 with only 464 mm of rainfall, and the wettest year was 2022 with 1539 mm.
FAQ
Is January a good time to visit Johannesburg?
Can you sunbathe in Johannesburg in January?
Is Johannesburg rainy in January?
Is it sunny in Johannesburg in January?
Other cities in South Africa
Monthly weather in Johannesburg
Source of the data
For this page, we’ve looked at the typical weather in Johannesburg, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.