At solar noon (11:52:29 AM) the sun reaches 74.6° above the horizon in Johannesburg. Without clouds, that corresponds to a maximum UV index of about 11.2 (extreme). Clouds usually lower the real value; snow, sand, water and altitude can raise it.
UV index in Johannesburg, next 14 days
| Date | Sun at noon | Clear-sky max | Forecast max |
|---|---|---|---|
| 74.6° | 11.2 Extreme | — | |
| 74.9° | 11.3 Extreme | — | |
| 75.3° | 11.3 Extreme | — | |
| 75.6° | 11.4 Extreme | — | |
| 76.0° | 11.4 Extreme | — | |
| 76.3° | 11.4 Extreme | — | |
| 76.7° | 11.5 Extreme | — | |
| 77.0° | 11.5 Extreme | — | |
| 77.3° | 11.6 Extreme | — | |
| 77.6° | 11.6 Extreme | — | |
| 78.0° | 11.6 Extreme | — | |
| 78.3° | 11.7 Extreme | — | |
| 78.6° | 11.7 Extreme | — | |
| 78.9° | 11.7 Extreme | — |
Clear-sky values are calculated from the sun's height at solar noon (cloud-free sky, average ozone). Forecast values from Open-Meteo include clouds and load in your browser.
High UV today? Sport sunscreen with SPF 100 stays on through sweat — essential for long outdoor activities.
View on Amazon →About Johannesburg
Johannesburg, the largest city in South Africa, recorded a population of 4,803,262 in 2022. The municipality covers an area of 1,644 square kilometres and has existed as a municipality since 1886. Within the city limits, landmarks include the FNB Stadium, the University of the Witwatersrand, and the University of Johannesburg. The city sits at an elevation of 1,753 metres above sea level within the Gauteng region. Its international network includes twin towns such as New York City, Birmingham, and Lehrte. Other local sites are the Satyagraha House, the Apartheid Museum, the Nelson Mandela Bridge, Gold Reef City, and the Johannesburg Zoo.
AI-assisted description based on geographic data and editorial notes.