Johannesburg weather in January
January in Johannesburg: warm, rainy — an excellent time to visit.
#7 of 12 months in Johannesburg · #95 of 604 destinations to visit in January · comfort 85/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Johannesburg climate normals — January
| Daytime high | 25°C / 76°F | 🌤 warm |
|---|---|---|
| Nighttime low | 15°C / 58°F | |
| Feels like (high) | 26°C / 79°F | |
| Rainfall | 129 mm / 5.1 in | 🌧 rainy |
| Rainy days | 16 days | |
| Humidity | 68% | 💧 humid |
| Dew point | 12°C / 54°F | |
| Sunshine | 11 h/day | |
| Daylight | 13.6 h | |
| Wind | 17 km/h / 10 mph | |
| Air quality (US AQI) | 83 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Johannesburg in January — FAQ
- Is January a good time to visit Johannesburg?
- January in Johannesburg: warm, rainy — an excellent time to visit. It ranks #7 of 12 months for Johannesburg on SeasonMap's comfort score (85/100).
- What is the weather like in Johannesburg in January?
- In January, Johannesburg averages a daily high of 24.7°C and a low of 14.5°C, with about 128.7 mm of rain over roughly 16.4 rainy days.
- What is the air quality in Johannesburg in January?
- Johannesburg has a mean US Air Quality Index of about 83 in January.