Johannesburg weather in December
Temperature, rain and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Good
Best time to visit: April – October
What is the weather like in Johannesburg in December?
In December, Johannesburg is warm: daytime highs average 24 °C, and nights cool down to about 14 °C. The sun shines for around 7 hours a day. It rains often – on about 18 days, adding up to 137 mm. All in all, December is a good month for a holiday in Johannesburg.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 70 | 62 | 65 |
| Day | 24° | 24° | 24° |
| Night | 12° | 14° | 14° |
| Sun | 7 h | 7 h | 7 h |
| Rain days | 14 | 18 | 16 |
More details for December
- Daylight
- 13 h 46 min05:10 – 18:56
- UV index
- 13 · extremeclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 18 km/haverage daily peakAll months
- Cloud cover
- 56 %on averageAll months
- Hot days
- 2 days30 °C or moreAll months
- Time zone
- UTC+2Africa/Johannesburg
How the score comes together
- Temperatureweight 50 %100 %
- Sunshineweight 20 %62 %
- Few rainy daysweight 30 %0 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in December
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Johannesburg in December: quick answers
Is Johannesburg hot in December?
Warm rather than hot: in December, daytime highs in Johannesburg average 24 °C and nights cool to about 14 °C. On about 2 days the thermometer climbs to 30 °C or more.
Does it rain much in Johannesburg in December?
It rains often – on about 18 days, adding up to 137 mm.
Johannesburg month by month
The whole year in JohannesburgAll destinations: South AfricaWhere to go in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences