Johannesburg, South Africa Weather
Johannesburg hourly forecast: next 24 hours
Today's high of 70°F (21°C) is right in line with the typical August high of 70°F (21°C).
Current conditions in detail
Johannesburg weather tomorrow (Friday, August 7)
Tomorrow in Johannesburg looks sunny, with a high of 69° and an overnight low of 55°. Rain is unlikely (0% chance). Winds top out near 10 mph, and the UV index reaches 6 (high).
Johannesburg 14-day forecast
About the weather in Johannesburg
Weather in Johannesburg is shaped by its oceanic climate - expect mild temperatures year-round with regular rainfall. December afternoons typically reach 79°F (26°C), while July highs hover near 63°F (17°C). Annual precipitation averages 23.9 inches (606 mm) over about 86 rainy days.
Johannesburg weather: quick facts
- Hottest month: December - highs near 79°F (26°C)
- Coldest month: July - highs near 63°F (17°C)
- Record high: 97°F (36°C) · Record low: 25°F (-4°C) (2015–2024)
- Wettest month: January (14 rainy days) · Sunniest: January (11.6 h sun/day)
- Climate type: oceanic - mild temperatures year-round with regular rainfall
Temperatures through the year
The warmest stretch of the year centers on December. Highs average 79°F (26°C) and overnight lows stay near 59°F (15°C). The coolest month is July, with typical highs of 63°F (17°C) and lows around 39°F (4°C). Based on 2015–2024 weather data, temperatures have reached as high as 97°F (36°C) and dropped as low as 25°F (-4°C).
Rain, sun and snow
January is usually the wettest month. It brings about 4.6 inches (117 mm) of rain over 14 days, while August is the driest. January brings the most sunshine, averaging 11.6 hours of sun a day.
Season by season
Spring (September through November)
Spring in Johannesburg brings comfortable warmth, with daytime highs averaging 78°F (26°C) and nights around 53°F (12°C); expect showers on roughly 21 days across the season.
Summer (December through February)
Summer in Johannesburg is pleasantly warm, with daytime highs averaging 78°F (26°C) and nights around 58°F (15°C); expect showers on roughly 43 days across the season.
Fall (March through May)
Fall in Johannesburg is mild and warm, with daytime highs averaging 71°F (22°C) and nights around 51°F (10°C); expect showers on roughly 19 days across the season.
Winter (June through August)
Winter in Johannesburg is crisp but comfortable, with daytime highs averaging 65°F (18°C) and nights around 41°F (5°C); precipitation is infrequent.
Average temperatures in Johannesburg by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 78° | 58° | 14 | 4.6 in | 11.6 h/day | 66% |
| February | 77° | 58° | 13 | 4.1 in | 11.0 h/day | 68% |
| March | 76° | 56° | 9 | 2.4 in | 10.7 h/day | 65% |
| April | 71° | 51° | 8 | 2.2 in | 10.1 h/day | 65% |
| May | 68° | 45° | 2 | 0.6 in | 9.8 h/day | 54% |
| June | 63° | 40° | 1 | 0.3 in | 9.8 h/day | 51% |
| July | 63° | 39° | 0 | 0.1 in | 10.2 h/day | 46% |
| August | 70° | 44° | 1 | 0.1 in | 10.6 h/day | 40% |
| September | 76° | 50° | 3 | 0.5 in | 11.2 h/day | 39% |
| October | 79° | 53° | 7 | 1.5 in | 11.1 h/day | 46% |
| November | 79° | 56° | 11 | 3.0 in | 11.5 h/day | 56% |
| December | 79° | 59° | 16 | 4.3 in | 11.3 h/day | 64% |