Weather radar Johannesburg
Real-time precipitation radar · Gauteng · South Africa
Johannesburg climate table – average temperature, precipitation & sunshine hours
The climate table for Johannesburg shows long-term monthly averages (2000–2023): average high and average low temperature in °C, monthly precipitation (mm), rainy days and sunshine hours per month. Data source: ERA5 reanalysis (ECMWF) via the WDTEC Climate Archive.
| Month | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 24.6° | 24.3° | 23.2° | 20.8° | 18.8° | 16.5° | 16.6° | 20° | 23.9° | 25.1° | 24.7° | 24.8° |
| Avg low (°C) | 14.3° | 14.1° | 12.6° | 9.7° | 6.2° | 3.4° | 2.5° | 5.4° | 8.9° | 11.4° | 12.6° | 14.1° |
| Precipitation (mm) | 132 | 113 | 78 | 50 | 17 | 10 | 2 | 9 | 19 | 65 | 90 | 126 |
| Rainy days | 16 | 14 | 12 | 7 | 3 | 2 | 1 | 2 | 3 | 10 | 13 | 17 |
| Sunshine hours | 338 | 297 | 313 | 285 | 296 | 281 | 296 | 309 | 319 | 338 | 324 | 339 |
| Humidity | – | – | – | – | – | – | – | – | – | – | – | – |
Best time to visit Johannesburg
The best time to visit Johannesburg is typically September. In this month the average high is 23.9°C, precipitation is 19 mm and sunshine duration is 319 hours. The annual average high is 21.9°C, total annual precipitation is 711 mm (100 rainy days/year) and annual sunshine is 3735 hours.
Frequently asked questions about the weather in Johannesburg
How up to date is the weather radar for Johannesburg?
The weather radar for Johannesburg is updated every 5 minutes with new radar data from the OPERA composite radar. A 2-hour forecast animation is also available. Rainfall probability, wind gusts and UV index are available up to 14 days in advance.
What weather data is available for Johannesburg?
Besides the rain radar, RadarWeather provides for Johannesburg: rainfall probability, thunderstorm warning (CAPE index), wind gusts, UV index, air pressure, humidity, dew point, sunshine hours, snow line and a 14-day forecast based on ICON-D2, ECMWF IFS and GFS.
When are thunderstorms expected in Johannesburg?
The thunderstorm potential for Johannesburg is calculated from the CAPE index and lightning potential. Active storm cells and severe weather warnings are visible on the radar map in real time. Thunderstorm warnings are issued automatically as soon as storm cells are detected near Johannesburg.
What is the climate like in Johannesburg?
Johannesburg has an annual average high of 21.9°C. The warmest month is October (avg high 25.1°C), the coldest July (avg low 2.5°C). The wettest month is January with 132 mm, the driest July with 2 mm. Total annual precipitation is 711 mm (100 rainy days). Annual sunshine is 3735 hours.
Weather radar near Johannesburg
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