Johannesburg weather in 2025
Johannesburg weather in 2025, with 365 daily observations from Open-Meteo archive data.
Interactive graph
Open Johannesburg in the interactive graph
Use the graph view to inspect 2025 alongside other available years for Johannesburg.
Year summary
In 2025, Johannesburg averaged 21.5 C for daily highs and 11.5 C for daily lows.
A 1991-2020 normal is not available for this location yet, so this page compares 2025 with the 2023-2025 archive baseline. The 2025 average daily high was -1.3 C from that baseline, and total precipitation was +342.3 mm from the baseline total.
The warmest month was January, with an average high of 26.1 C, while June had the lowest average low at 5.1 C.
The wettest month was February, totaling 196.8 mm. The hottest day reached 31.5 C on January 31, 2025.
Monthly averages and precipitation
| Month | Avg low C | Avg high C | Rain and snow mm | Days |
|---|---|---|---|---|
| January | 16.1 | 26.1 | 95.1 | 31 |
| February | 16.2 | 24.6 | 196.8 | 28 |
| March | 14.5 | 23.0 | 98.0 | 31 |
| April | 11.5 | 19.5 | 107.9 | 30 |
| May | 7.6 | 18.8 | 8.7 | 31 |
| June | 5.1 | 16.0 | 4.9 | 30 |
| July | 5.1 | 16.2 | 7.3 | 31 |
| August | 8.7 | 20.9 | 25.7 | 31 |
| September | 12.8 | 24.8 | 24.8 | 30 |
| October | 13.0 | 24.6 | 58.0 | 31 |
| November | 12.8 | 21.2 | 148.1 | 30 |
| December | 14.3 | 22.9 | 179.6 | 31 |
Daily records in 2025
| Record | Date | Value |
|---|---|---|
| Hottest day | January 31, 2025 | 31.5 C |
| Coldest night | June 28, 2025 | -0.9 C |
| Wettest day | February 19, 2025 | 40.3 mm |
Related pages
Weather data source: Open-Meteo Archive API. City metadata source: GeoNames cities15000.