UV Index
UV Index
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Today's UV index in Johannesburg, South Africa 
will be up to 13.4, indicating a extreme level of sun exposure for the average person. Check the annual sun radiation in the city and our tips for today to make sure you're safe in the sun.
UV index at 13.4 in Johannesburg means extreme risk; limit outdoor time from 10 a.m. to 4 p.m., use shade, protective clothing, SPF 30+ sunscreen, and sunglasses; watch for bright surfaces like water and snow increasing UV exposure.
Johannesburg, Gauteng, South Africa's weather is characterized by high UV indices, particularly during the summer months, with average readings ranging from 10 to 12, making it essential to take precautions. The city's subtropical highland climate means that temperatures are generally mild, with minimal humidity.
The region experiences a distinct seasonal pattern, with summer (October to March) bringing warm and wet weather, while winter (April to September) is cool and dry. Johannesburg's weather is influenced by its high altitude, which affects the temperature and precipitation patterns.
Compared to other regions in South Africa, Johannesburg's weather is relatively mild, with temperatures generally staying above 0°C (32°F) even in winter. Neighboring countries, such as Namibia and Botswana, experience a more arid climate, while countries like Mozambique and Swaziland have a more tropical climate.