Johannesburg weather
World cities · South Africa · 26.20°S 28.05°E
Johannesburg, in South Africa, has its warmest weather in October, when daytime temperatures average 25.7°C, while July nights are the coldest at around 3.5°C. The city sees roughly 644mm of rain a year; December is normally the wettest month and July the driest. Figures are averaged from 2020–2024 observations.
Climate averages
| Month | Avg high | Avg low | Rain | Rain days |
|---|---|---|---|---|
| Jan | 25.2° | 14.4° | 114mm | 15 |
| Feb | 25° | 14.3° | 109mm | 14 |
| Mar | 24.1° | 13° | 42mm | 8 |
| Apr | 21.4° | 10.1° | 73mm | 7 |
| May | 19.7° | 7.3° | 17mm | 3 |
| Jun | 16.6° | 4° | 13mm | 2 |
| Jul | 17.2° | 3.5° | 1mm | 0 |
| Aug | 20.4° | 6.2° | 3mm | 1 |
| Sep | 24.7° | 10° | 13mm | 3 |
| Oct | 25.7° | 12° | 45mm | 7 |
| Nov | 25.5° | 13.6° | 87mm | 13 |
| Dec | 25.2° | 14.7° | 127mm | 18 |
Seasons in Johannesburg
Spring (September–November). Daytime highs in Johannesburg climb from 24.7°C in September to 25.5°C by November, while nights ease from 10°C to 13.6°C. The season brings around 145mm of rain in total.
Summer (December–February). The warmest stretch of the year: afternoons average 25.1°C, peaking in December at 25.2°C. February is usually the driest of the summer months (109mm over ~14 rainy days). Around the December solstice, Johannesburg gets roughly 13.6 hours of daylight.
Autumn (March–May). Daytime temperatures fall from 24.1°C in March to 19.7°C by May, with around 132mm of rain across the season.
Winter (June–August). Nights average 4.6°C, with July the coldest month (average low 3.5°C, daytime high 17.2°C). Expect about 3 days with measurable rain over the three months, and only around 10.4 hours of daylight in mid-June.
How Johannesburg compares
| Johannesburg | UK town average | |
|---|---|---|
| Annual rainfall | 644mm | 1054mm |
| Rainy days per year | 91 | 167 |
| Summer daytime high | 25.1°C | 19.7°C |
| Winter night low | 4.6°C | 3.4°C |
Johannesburg is about 39% drier than the average for the 121 UK towns tracked on this site (1054mm), based on 2020–2024 monthly normals.
Johannesburg weather FAQs
What is the warmest month in Johannesburg?
October is typically the warmest month in Johannesburg, with average daytime highs of 25.7°C. Summer afternoons (December–February) average around 25.1°C.
What is the wettest month in Johannesburg?
December is usually the wettest month, with around 127mm of rain over roughly 18 rainy days. July is typically the driest (1mm).
How much does it rain in Johannesburg per year?
Johannesburg receives roughly 644mm of precipitation per year, spread over about 91 days with at least 1mm of rain (based on 2020–2024 observations).
How cold are winters in Johannesburg?
Winter nights (June–August) in Johannesburg average around 4.6°C, with July typically the coldest month (average low 3.5°C).
When is the best time to visit Johannesburg for good weather?
Late spring and summer offer the most reliable weather in Johannesburg. February is typically the driest of the warm months (109mm of rain), while December is the warmest, averaging 25.2°C by day — and near the December solstice there are around 14 hours of daylight to enjoy.
How does Johannesburg's weather compare with the UK?
Johannesburg receives 644mm of rain a year, about 39% drier than the average for the 121 UK towns tracked on this site (1054mm). Summer daytime highs average 25.1°C against a UK-town average of 19.7°C, and winter nights average 4.6°C versus 3.4°C.