Verdict: Excellent month
Johannesburg Weather in September
September hits the sweet spot in Johannesburg — highs around 25°C (77°F), ideal for a full day on foot. Rain is a non-issue, with only ~3 wet days in an average year. Overall, September is one of the best months of the year to be in Johannesburg.
Average high
25°C / 77°F
Average low
10°C / 50°F
Rain days
~3
Precipitation
13 mm
What to pack for Johannesburg in September
- Summer clothes, plus one light layer for air-con and evenings
- Comfortable walking shoes — every guide on this site assumes you'll use them
September against the rest of the year
Warmest in Johannesburg: Oct (26°C / 79°F) · Coolest: Jun (17°C / 63°F) · Wettest: Dec (~18 rain days)
25°
14°
Jan
25°
14°
Feb
24°
13°
Mar
21°
10°
Apr
20°
7°
May
17°
4°
Jun
17°
4°
Jul
20°
6°
Aug
25°
10°
Sep
26°
12°
Oct
25°
14°
Nov
25°
15°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)