Avg high
20°C
Avg low
7°C
Rainfall
14 mm
Rain days
2.2
Sunshine
10 h/day
Daylight
10.7 h
What to pack for Johannesburg in May
- t-shirts and light layers
- a light jacket for evenings
Humidity averages 54%; max daily wind around 15 km/h.
How May compares
Best months in Johannesburg: March–October. See the full best time to visit Johannesburg guide.
Johannesburg in May: the details
In May, Johannesburg sees average daytime highs of 20°C (68°F) and overnight lows of 7°C (45°F). Rainfall totals roughly 14 mm across 2.2 rainy days, and the sun shines about 10 hours per day with 10.7 hours of daylight mid-month. Relative humidity averages 54%.
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?
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