Verdict: Excellent month
Johannesburg Weather in August
August hits the sweet spot in Johannesburg — highs around 20°C (68°F), ideal for a full day on foot. Rain is a non-issue, with only ~1 wet day in an average year. Overall, August is one of the best months of the year to be in Johannesburg.
Average high
20°C / 68°F
Average low
6°C / 43°F
Rain days
~1
Precipitation
3 mm
What to pack for Johannesburg in August
- Layers — t-shirts under a light jacket or sweater
- Evenings turn genuinely cool — pack a warm layer for after dark
- Comfortable walking shoes — every guide on this site assumes you'll use them
August 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)