WanderWhen

Johannesburg weather in September

September is one of the best months to visit Johannesburg. Expect highs around 25°C, lows near 10°C, and about 3 days with rain.

10.0 · Excellenttravel score for September
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Avg high
25°C
Avg low
10°C
Rainfall
12 mm
Rain days
3
Sunshine
11.2 h/day
Daylight
11.9 h

What to pack for Johannesburg in September

  • t-shirts and light layers
  • a light jacket for evenings

Humidity averages 39%; max daily wind around 21 km/h.

How September compares

January: 8.4/10 JFebruary: 8.6/10 FMarch: 9.8/10 MApril: 9.8/10 AMay: 10.0/10 MJune: 10.0/10 JJuly: 10.0/10 JAugust: 10.0/10 ASeptember: 10.0/10 SOctober: 10.0/10 ONovember: 8.8/10 NDecember: 7.8/10 D

Best months in Johannesburg: March–October. See the full best time to visit Johannesburg guide.

Johannesburg in September: the details

In September, Johannesburg sees average daytime highs of 25°C (76°F) and overnight lows of 10°C (50°F). Rainfall totals roughly 12 mm across 3 rainy days, and the sun shines about 11.2 hours per day with 11.9 hours of daylight mid-month. Relative humidity averages 39%.

These figures are climate normals computed from the ERA5 weather reanalysis (2019–2024) for Johannesburg, South Africa (-26.2, 28.04) — see our methodology. Actual conditions vary year to year.

Where should you go next month?

Get one email a month with the destinations at their seasonal best. Double opt-in, unsubscribe anytime.