Johannesburg weather in May
May in Johannesburg: nice, dry — an excellent time to visit.
#10 of 12 months in Johannesburg · #262 of 604 destinations to visit in May · comfort 83/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Johannesburg climate normals — May
| Daytime high | 19°C / 66°F | 😎 nice |
|---|---|---|
| Nighttime low | 6°C / 43°F | |
| Feels like (high) | 16°C / 61°F | |
| Rainfall | 28 mm / 1.1 in | ☀️ dry |
| Rainy days | 4 days | |
| Humidity | 69% | 💧 humid |
| Dew point | 6°C / 42°F | |
| Sunshine | 9.7 h/day | |
| Daylight | 10.8 h | |
| Wind | 14 km/h / 9 mph | |
| Air quality (US AQI) | 100 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Johannesburg in May — FAQ
- Is May a good time to visit Johannesburg?
- May in Johannesburg: nice, dry — an excellent time to visit. It ranks #10 of 12 months for Johannesburg on SeasonMap's comfort score (83/100).
- What is the weather like in Johannesburg in May?
- In May, Johannesburg averages a daily high of 18.9°C and a low of 6.1°C, with about 28.2 mm of rain over roughly 3.8 rainy days.
- What is the air quality in Johannesburg in May?
- Johannesburg has a mean US Air Quality Index of about 100 in May.