Weather in Johannesburg: December
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Average day temperature: | 80.3°F |
| Average night temperature: | 64.7°F | |
 |
Number of sunny days: | 18 days |
| Day length: | 13.7 - 13.8 hours | |
 |
Number of rainy days: | 6 days |
| Precipitation totals: | 3.5 in. | |
| more information | ||
14 days
forecast
forecast
| Johannesburg |
weather in
January
January
| Johannesburg |
Air temperature in December, °F
Show year:
2025
2024
2023
The highest day temperature during December of 2025 was 82°F. At the same time the lowest night temperature was 57°F. Daily and nightly averages during December were 74.7°F and 61.3°F.
Sunny, partly cloudy and cloudy days
Mostly all days in December are sunny but cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in Johannesburg in December is 3.4 in. Other months of the year show relatively similar values.
Wind speed in December, mph
The average wind speed value in December is 7.7 mph It makes December one of the most windy months of the year.
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in December is: 8.9.
Best time for vacation in Johannesburg
Johannesburg on a weather map
Places in South Africa:
Name
°F
24 Hours Forecast
Johannesburg
Local time: 09:42
January 01, thursday
1200
81°F
SE
14 mph
14 mph
1500
77°F
E
12 mph
12 mph
1800
73°F
E
7 mph
7 mph
2100
70°F
SE
6 mph
6 mph
January 02, friday
0000
66°F
SE
6 mph
6 mph
0300
63°F
W
3 mph
3 mph
0600
63°F
SW
4 mph
4 mph
0900
73°F
S
6 mph
6 mph
