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Climate · Johannesburg

Johannesburg in September

Warm and dry, as the days lengthen.

Typical weather, averaged over 30 years

September in Johannesburg is warm: highs near 77°F, lows near 48°F. Rain falls on about one day a week, and the days lengthen by 33 minutes from the first week to the last.September in Johannesburg is warm: highs near 25°C, lows near 9°C. Rain falls on about one day a week, and the days lengthen by 33 minutes from the first week to the last.

High
77°F25°Caverage
Low
48°F9°Caverage
Wet days
1a week · 11% of days
Daylight
12h 00mon average

Is September a good time to visit Johannesburg?

Yes. September is one of Johannesburg's best months (April, or August to October).

How we judge it: every month is scored on how close its typical high comes to the range from 70°F to 80°F, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.How we judge it: every month is scored on how close its typical high comes to the range from 21°C to 27°C, how mild its nights are, and how rarely it rains. The best months are the run of months that scores best.

How September sits in the year

week by week

Temperature

Highs near 77°F in September, against 64°F to 80°F through the year.Highs near 25°C in September, against 18°C to 27°C through the year.

Chance of a wet day

11% of days in September, against 3% to 62% through the year.

Cloud cover

17% cover in September, against 11% to 44% through the year.

Daylight

12h 00m in September, against 10h 31m to 13h 45m through the year.

Week by week, lightly smoothed, with September shaded. The olive line marks the best months. Hover or tap a week for its figures.

Either side

  1. August70°21°low 41°low 5°no wet daysRain on fewer than one day a week.
  2. September77°25°low 48°low 9°1 wet day a weekRain on about one day a week.
  3. October80°27°low 52°low 11°2 wet days a weekRain on about two days a week.

Where Johannesburg sits, in September

Africa/Johannesburg
this place
typical high in September 40°F4°C95°F35°C
Sunrise, mid-September
6:06 AMsets 6:00 PM
Above the sea
1,750 mhigh country
Latitude
26.2°Ssouthern hemisphere
Nearest of ours
Pretoria53 km north

The land around Johannesburg, shaded by its typical high in September, the planning map's own layer. Hover the map for the figure at that spot; tap it on a phone. Clock times are local, for the 15th.

Elsewhere in South Africa in September

high · low · wet days
See September on the planning mapThe whole year in Johannesburg

Typical weather, averaged over 30 years (1995–2024), from the 11 km grid square nearest Johannesburg. Temperatures are adjusted against 66 weather stations: daytime highs read about 3.1°F cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (1,750 m) against the climate model's (1,673 m).Temperatures are adjusted against 66 weather stations: daytime highs read about 1.7°C cold in the source data and are raised to match, and both highs and lows are adjusted for the town's height (1,750 m) against the climate model's (1,673 m). Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not. Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.

Daylight is calculated from latitude. Charts are lightly smoothed week to week; the figures in the table are not.

Source: Copernicus ERA5-Land reanalysis; cloud cover from NASA's MERRA-2 reanalysis, on a coarser grid of about 50 km. Contains modified Copernicus Climate Change Service information 2026; neither the European Commission nor ECMWF is responsible for any use of it. These are averages, not a forecast.