Johannesburg
December
Weather in Johannesburg for December 2025
Your guide to Johannesburg weather in December - trends and predictions
Until now, December 2025 in Johannesburg is cooler than usual, with temperatures averaging 26 °C, this is -2.2 °C below the typical seasonal average.
The forecast for the next days in Johannesburg predicts a temperature of 24.1 °C, which is cooler than the historical average.
In general, the average temperature in Johannesburg at the beginning of December is 29.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.6 °C by the end of December.
Johannesburg experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 161.9 mm.
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Temperatures
Rain 🌧️
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0
Dry days
31
Rainy days
0
Snow days
27°/17°
Temperatures
19 km/h
Avg max wind
55 %
Avg humidity
Johannesburg Weather December
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Temperatures trend during December in Johannesburg
See the weather trend as well as the moving average line
December weather in Johannesburg day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Sunny | 29° /15° | 1.8 mm | 9 | |
| 2 Dec. |  Moderate rain at times | 30° /16° | 4.6 mm | 9 | |
| 3 Dec. | Moderate or heavy rain shower | 31° /17° | 4 mm | 9 | |
| 4 Dec. |  Partly cloudy | 30° /17° | 4.3 mm | 9 | |
| 5 Dec. | Moderate or heavy rain shower | 27° /17° | 15.8 mm | 8 | |
| 6 Dec. |  Heavy rain at times | 29° /16° | 3.3 mm | 9 | |
| 7 Dec. |  Patchy rain possible | 28° /16° | 5.5 mm | 9 | |
| 8 Dec. | Patchy rain possible | 28° /16° | 2.7 mm | 9 | |
| 9 Dec. | Patchy rain possible | 29° /17° | 3.1 mm | 9 | |
| 10 Dec. | Patchy rain possible | 27° /15° | 4 mm | 8 | |
| 11 Dec. | Patchy rain possible | 27° /17° | 4.7 mm | 9 | |
| 12 Dec. | Moderate or heavy rain shower | 26° /16° | 6.2 mm | 9 | |
| 13 Dec. | Moderate or heavy rain shower | 25° /16° | 10.2 mm | 8 | |
| 14 Dec. |  Cloudy | 28° /16° | 2.4 mm | 8 | |
| 15 Dec. | Patchy rain possible | 25° /15° | 0.2 mm | 2.3 | |
| 16 Dec. | Patchy rain possible | 25° /17° | 1.2 mm | 2.3 | |
| 17 Dec. | Patchy rain possible | 26° /17° | 2 mm | 2.7 | |
| 18 Dec. |  Moderate rain | 23° /15° | 15.7 mm | 2.7 | |
| 19 Dec. | Patchy rain possible | 24° /15° | 1.3 mm | 3.6 | |
| 20 Dec. | Moderate rain | 26° /16° | 5.7 mm | 7 | |
| 21 Dec. | Moderate rain | 26° /15° | 7.3 mm | 7 | |
| 22 Dec. | Patchy rain possible | 23° /16° | 2 mm | 7 | |
| 23 Dec. | Patchy rain possible | 25° /15° | 2.5 mm | 7 | |
| 24 Dec. | Patchy rain possible | 22° /16° | 1.9 mm | 7 | |
| 25 Dec. | Patchy rain possible | 19° /15° | 3.3 mm | 7 | |
| 26 Dec. | Patchy rain possible | 24° /16° | 0.7 mm | 7 | |
| 27 Dec. | Patchy rain possible | 25° /16° | 3.5 mm | 7 | |
| 28 Dec. | Patchy rain possible | 24° /16° | 3.7 mm | 7 | |
| 29 Dec. | Light rain shower | 26° /16° | 4.5 mm | 8 | |
| 30 Dec. | Patchy rain possible | 27° /16° | 6.9 mm | 8 | |
| 31 Dec. | Patchy rain possible | 27° /16° | 7.4 mm | 8 | |
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Important Notice
Our weather forecast for Johannesburg in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Johannesburg forecast closer to your planned date for the most up-to-date weather information.
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Johannesburg in December - FAQ
What are the expected maximum and minimum temperatures in Johannesburg during December?
During December, expect a variety of temperatures with highs around 27° and lows near 17°, suitable for diverse activities and preferences.
How much rainfall should be expected in Johannesburg during December?
Significant rainfall exceeding 161.9 mm is expected in Johannesburg during December, occurring over more than 31 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Johannesburg during December?
The average wind speed in Johannesburg during December is 19 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Johannesburg
Explore the daily rainfall trends and prepare for Johannesburgs December weather 💧
Typically, Johannesburg has 31 rainy days in December with a total of 161.9 mm of rainfall.
UV exposure in Johannesburg during December
Stay informed about UV levels for safe outdoor activities throughout the month of December ☀️
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