Johannesburg weather
Loading live data…Latest for Johannesburg: European (ECMWF): 17° Clear · American (NOAA GFS): 18° Mainly clear · German (DWD ICON): 16° Overcast.
The weather map: all three models at once
European, American, German side by side around Johannesburg and nearby towns.Live rain radar →Hourly forecast: next 14 hours
consensus of the three modelsRain in the next 24 hours, model by model
each model's own hourly precipitation, side by sideLoading the three models…
10-day forecast, out to 14 days
where the models agree, and where they splitHeading to Johannesburg? Johannesburg, South Africa, sits at 26.2°S in a subtropical climate zone. Before you lock in outdoor plans, compare how the three global models - European (ECMWF), American (GFS) and German (ICON) - forecast Johannesburg right now. Where they agree you can trust it; the days they split are exactly when a single weather app is least reliable. For a city break, the rain hours below tell you which days to plan indoors.
Best time to visit Johannesburg
The most comfortable time to visit Johannesburg is usually February, March, April and May, when daytime highs sit in the pleasant 16-26°C range and the heaviest January rain is behind you.
Johannesburg weather by month
what to expect in Johannesburg through the year, 1991-2020 averagesHere is Johannesburg's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Johannesburg by season.
Johannesburg compared with Sydney
30-year averages: daytime highs month by month, rain and sunlightWarmer through the year
average daytime high: Johannesburg 24°C, Sydney 23°C
Rain over a year
Johannesburg 822 mm, Sydney 1,148 mm
Sunlight vs a clear sky
solar energy reaching the ground as a share of a cloudless day, averaged over the year (not sunshine hours)
On 30-year averages Johannesburg runs 1°C warmer than Sydney, with every month between −2°C and +3°C. Over a year it gets 28% less rain than Sydney.
Month by month in numbers
| Month | Johannesburg | Sydney | Difference | Sunlight, Johannesburg | Sunlight, Sydney |
|---|---|---|---|---|---|
| January | 26°C | 27°C | −1°C | 77% | 75% |
| February | 26°C | 28°C | −2°C | 78% | 73% |
| March | 26°C | 26°C | ±0°C | 80% | 75% |
| April | 22°C | 24°C | −2°C | 82% | 77% |
| May | 21°C | 22°C | −1°C | 91% | 79% |
| June | 17°C | 18°C | −1°C | 93% | 74% |
| July | 18°C | 18°C | ±0°C | 95% | 80% |
| August | 21°C | 20°C | +1°C | 94% | 82% |
| September | 25°C | 22°C | +3°C | 92% | 82% |
| October | 26°C | 24°C | +2°C | 84% | 77% |
| November | 27°C | 25°C | +2°C | 79% | 74% |
| December | 27°C | 27°C | ±0°C | 76% | 74% |
Daytime highs and lows on this page are 1991-2020 averages. Johannesburg: no weather station within 30 km at a similar height, so lows are ERA5 point values for 2023-2024, corrected month by month by NASA POWER's difference between those two years and 1991-2020, and highs are the uncorrected ERA5 values, which tested closer to station normals; rain is the CHELSA 1981-2010 climatology on a 1 km grid. Sydney: station normals from Sydney Observatory Hill (WMO), rain included. Sunlight vs a clear sky is NASA POWER's long-term average of the solar energy reaching the ground as a share of a cloudless day; it compares cloudiness and is not a count of sunshine hours. Sydney stands in for Australia here; other cities have their own climate tables.