UV Index
Johannesburg UV Index Today
- Current UV Index0.0
- Cloud Cover00%
- Temperature00.0 ℃
Day Summary
- Max UV Index9.8
- Avg Clouds1%
- Max Temp26.1 ℃
- Peak UV at 1 PM
- Protection Required ☀️
The UV index in Johannesburg, South Africa 
will reach a high of 9.8 today. This means a veryhigh level of sun exposure. See our tips below to stay safe!
Last checked: 2025-09-18
Hourly Forecast Chart
Today's Safety Tips
The risk is very high. It's best to stay out of the sun between 10 a.m. and 4 p.m. If you must be outside, wear protective clothing and apply sunscreen often.
Johannesburg's UV Index
Johannesburg's UV index ranges from moderate in winter (around 3-5) to very high in summer (up to 10 or 11), meaning the sun's rays are strongest during the warmer months. The city experiences a summer rainy season with afternoon thunderstorms, while winters are dry and mild, with temperatures cooling down but rarely freezing. Compared to other parts of South Africa, Johannesburg is cooler than the coastal areas and experiences more rainfall than the dry western regions. Neighboring countries like Botswana have drier, hotter climates, whereas Mozambique is more humid with a longer rainy season.
Hourly UV Index Trend
See the UV index hour by hour for Johannesburg. When the level is high, it's smart to find some shade.
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