Johannesburg weather in September
September in Johannesburg: nice, dry — one of the best months to visit.
#1 of 12 months in Johannesburg · #23 of 604 destinations to visit in September · comfort 93/100 (tier S)
Updated June 2026 · climate normals from ERA5 reanalysis
Johannesburg climate normals — September
| Daytime high | 25°C / 76°F | 😎 nice |
|---|---|---|
| Nighttime low | 9°C / 48°F | |
| Feels like (high) | 22°C / 72°F | |
| Rainfall | 9 mm / 0.4 in | ☀️ dry |
| Rainy days | 3 days | |
| Humidity | 39% | 🌵 dry |
| Dew point | 1°C / 33°F | |
| Sunshine | 10.8 h/day | |
| Daylight | 11.9 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 68 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Johannesburg in September — FAQ
- Is September a good time to visit Johannesburg?
- September in Johannesburg: nice, dry — one of the best months to visit. It ranks #1 of 12 months for Johannesburg on SeasonMap's comfort score (93/100).
- What is the weather like in Johannesburg in September?
- In September, Johannesburg averages a daily high of 24.7°C and a low of 9°C, with about 8.9 mm of rain over roughly 2.6 rainy days.
- What is the air quality in Johannesburg in September?
- Johannesburg has a mean US Air Quality Index of about 68 in September.