Johannesburg weather in December
December in Johannesburg: warm, rainy — an excellent time to visit.
#9 of 12 months in Johannesburg · #93 of 604 destinations to visit in December · comfort 84/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Johannesburg climate normals — December
| Daytime high | 24°C / 75°F | 🌤 warm |
|---|---|---|
| Nighttime low | 14°C / 57°F | |
| Feels like (high) | 24°C / 75°F | |
| Rainfall | 145 mm / 5.7 in | 🌧 rainy |
| Rainy days | 19 days | |
| Humidity | 69% | 💧 humid |
| Dew point | 13°C / 55°F | |
| Sunshine | 10.3 h/day | |
| Daylight | 13.7 h | |
| Wind | 18 km/h / 11 mph | |
| Air quality (US AQI) | 78 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Where is Johannesburg?
Loading map…
Johannesburg in December — FAQ
- Is December a good time to visit Johannesburg?
- December in Johannesburg: warm, rainy — an excellent time to visit. It ranks #9 of 12 months for Johannesburg on SeasonMap's comfort score (84/100).
- What is the weather like in Johannesburg in December?
- In December, Johannesburg averages a daily high of 23.9°C and a low of 14°C, with about 145.1 mm of rain over roughly 19.2 rainy days.
- What is the air quality in Johannesburg in December?
- Johannesburg has a mean US Air Quality Index of about 78 in December.