Weather in Johannesburg in December 2024
- December is usually the hottest month of the year in Johannesburg;
Average weather
Average temperature in Johannesburg in December
Going from a maximum of +33°C during the day to a minimum of +11°C during the night, the temperature in December averages around +27°C.
The average maximum temperature goes down 14% by the end of the month, compared with the beginning of the month, from +28°C to +25°C.
Is Johannesburg warm or cold in December?
Johannesburg is typically warm in December.
Maximum temperatures go up compared to the previous month from +24°C to +25°C. The minimum temperature also goes up from +13°C to +14°C.
It’s generally warm, but pack a long-sleeve shirt for evenings.
December is the hottest month in Johannesburg, here is the comparison with other months:
Climate in Johannesburg in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +24°C | +25°C | +25°C | ||||
| Min. temperature | ||||||
| +4°C | +5°C | +6°C | ||||
| Max. temperature | ||||||
| +35°C | +35°C | +37°C | ||||
| Rainfall | ||||||
| 111 mm | 148 mm | 142 mm | ||||
| Wind | ||||||
| 2 m/s | 1 m/s | 1 m/s | ||||
| Humidity | ||||||
| 65% | 70% | 72% | ||||
| Air pressure | ||||||
| 1016 HPa | 1015 HPa | 1014 HPa | ||||
| Sunny days | ||||||
| 5 | 3 | 4 | ||||
| Cloudy days | ||||||
| 5 | 4 | 3 | ||||
| Rainy days | ||||||
| 20 | 24 | 24 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
December weather is still as good as in November. It’s getting warmer as December arrives. The average maximum temperature goes up from +24°C to +25°C during the day. Prepare for more rain. Average rainfall goes from 111 mm to 148 mm. Humidity rises from 65% to 70%. Winds are calmer in comparison to November, going down from 2 m/s to 1 m/s on average. The days becoming less sunny, going from 5 sunny days in November to 3 in December.
January brings much the same weather, it remains good.
Wind
The average wind speed is 1 m/s getting up to 2 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Johannesburg is gradually increasing during December, going from 1 m/s to 1 m/s over the course of the month.
Rain
How was the weather last December in Johannesburg?
Climate Change over Years
The climate in Johannesburg in December has not changed much over the last 43 years.
The average temperature was the lowest in 2000 (+20°C) and the highest in 2015 (+25°C). The driest year was 2015 with only 464 mm of rainfall, and the wettest year was 2022 with 1539 mm.
FAQ
Is December a good time to visit Johannesburg?
Can you sunbathe in Johannesburg in December?
Is Johannesburg rainy in December?
Is it sunny in Johannesburg in December?
Other cities in South Africa
Monthly weather in Johannesburg
Source of the data
For this page, we’ve looked at the typical weather in Johannesburg, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.