Weather in Johannesburg
Live weather and 7-day forecast for Johannesburg, South Africa, followed by what to expect in each month of the year.
Sunrise 05:27 Sunset 18:19 Daylight 12h 51m Sun times →
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Forecast data from Open-Meteo
Climate in Johannesburg: month by month
Averaged over 2023–2025, the warmest month in Johannesburg is December, with highs around 26 °C (78 °F) and lows around 15 °C (59 °F); the coolest is July, with highs around 17 °C (63 °F) and lows around 4 °C (39 °F).
Johannesburg gets about 613 mm (24 in) of precipitation a year. The wettest month is February (133 mm over about 16 days) and the driest is July (3 mm).
| Month | Avg high | Avg low | Precipitation (mm) | Wet days | Daylight |
|---|---|---|---|---|---|
| January | 26° | 15° | 77 | 11 | 13h 36m |
| February | 25° | 15° | 133 | 16 | 12h 59m |
| March | 25° | 14° | 48 | 11 | 12h 16m |
| April | 21° | 10° | 57 | 7 | 11h 29m |
| May | 20° | 8° | 21 | 3 | 10h 51m |
| June | 17° | 4° | 9 | 2 | 10h 30m |
| July | 17° | 4° | 3 | 1 | 10h 38m |
| August | 21° | 7° | 9 | 1 | 11h 11m |
| September | 25° | 10° | 21 | 4 | 11h 55m |
| October | 26° | 11° | 44 | 8 | 12h 41m |
| November | 25° | 13° | 80 | 13 | 13h 23m |
| December | 26° | 15° | 111 | 18 | 13h 46m |
Averages of daily values from the ERA5 reanalysis for 2023–2025 at Johannesburg's coordinates (model elevation 1749 m), via Open-Meteo (CC BY 4.0). Three recent years are not a 30-year climate normal; reanalysis smooths local extremes and tends to count more light-rain days than a rain gauge would. Daylight is sunrise to sunset on the 15th of each month.
Weather questions for Johannesburg
What is the hottest month in Johannesburg?
December, with average highs of 26 °C (78 °F) and lows of 15 °C (59 °F) over 2023–2025. The coolest month is July, averaging 17 °C (63 °F) by day and 4 °C (39 °F) at night.
What is the rainiest month in Johannesburg?
February, with about 133 mm of precipitation on roughly 16 days. The driest month is July (3 mm), and the yearly total is around 613 mm.
When is the weather mildest in Johannesburg?
Going by the averages, August–May are the months with average daytime highs between 18 °C and 27 °C (64–81 °F) — warm but not hot. February is the month most likely to bring rain.
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About this forecast
The live forecast comes from Open-Meteo, which blends models from national weather services and is fetched fresh in your browser on each visit. Times in the hourly outlook are Johannesburg local time (Africa/Johannesburg).