Johannesburg weather in August
August in Johannesburg: nice, dry — an excellent time to visit.
#4 of 12 months in Johannesburg · #115 of 604 destinations to visit in August · comfort 88/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Johannesburg climate normals — August
| Daytime high | 21°C / 69°F | 😎 nice |
|---|---|---|
| Nighttime low | 5°C / 42°F | |
| Feels like (high) | 17°C / 63°F | |
| Rainfall | 3 mm / 0.1 in | ☀️ dry |
| Rainy days | 0 days | |
| Humidity | 43% | 🍃 comfortable |
| Dew point | -2°C / 29°F | |
| Sunshine | 10.1 h/day | |
| Daylight | 11.2 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 88 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Johannesburg in August — FAQ
- Is August a good time to visit Johannesburg?
- August in Johannesburg: nice, dry — an excellent time to visit. It ranks #4 of 12 months for Johannesburg on SeasonMap's comfort score (88/100).
- What is the weather like in Johannesburg in August?
- In August, Johannesburg averages a daily high of 20.5°C and a low of 5.4°C, with about 2.7 mm of rain over roughly 0.4 rainy days.
- What is the air quality in Johannesburg in August?
- Johannesburg has a mean US Air Quality Index of about 88 in August.