Avg high
25°C
Avg low
15°C
Rainfall
125 mm
Rain days
16.8
Sunshine
11 h/day
Daylight
13.6 h
What to pack for Johannesburg in December
- t-shirts and light layers
- a light jacket for evenings
- a compact umbrella or rain shell — rain is frequent
Humidity averages 68%; max daily wind around 19 km/h.
How December compares
Best months in Johannesburg: March–October. See the full best time to visit Johannesburg guide.
Johannesburg in December: the details
In December, Johannesburg sees average daytime highs of 25°C (77°F) and overnight lows of 15°C (58°F). Rainfall totals roughly 125 mm across 16.8 rainy days, and the sun shines about 11 hours per day with 13.6 hours of daylight mid-month. Relative humidity averages 68%.
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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