9.9
Very High · clear-sky maximum
Tuesday, October 20, 2026
At solar noon (11:50:16 AM) the sun reaches 63.5° above the horizon in Saint-Louis. Without clouds, that corresponds to a maximum UV index of about 9.9 (very high). Clouds usually lower the real value; snow, sand, water and altitude can raise it.
☀️ Sun Safety: When the UV index is high, protect yourself with sunscreen, shade, and a hat. Values of 6 or more indicate increased sunburn risk!
UV index in Saint-Louis, next 14 days
| Date | Sun at noon | Clear-sky max | Forecast max |
|---|---|---|---|
| 63.5° | 9.9 Very High | — | |
| 63.2° | 9.8 Very High | — | |
| 62.8° | 9.8 Very High | — | |
| 62.5° | 9.7 Very High | — | |
| 62.1° | 9.6 Very High | — | |
| 61.8° | 9.5 Very High | — | |
| 61.4° | 9.5 Very High | — | |
| 61.1° | 9.4 Very High | — | |
| 60.8° | 9.3 Very High | — | |
| 60.4° | 9.2 Very High | — | |
| 60.1° | 9.2 Very High | — | |
| 59.8° | 9.1 Very High | — | |
| 59.5° | 9.0 Very High | — | |
| 59.2° | 9.0 Very High | — |
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.
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The UV index in Saint-Louis measures the intensity of ultraviolet radiation reaching the ground.
Values below 3 are considered low risk, while 6 and above require sun protection such as sunscreen, sunglasses, and shade.
The clear-sky value shows how strong the sun can get on each day; the forecast shows what is expected with clouds.
See today's sunrise and sunset times for Saint-Louis
or discover the best light for photos during the golden hour in Saint-Louis.
About Saint-Louis
AI-assisted description based on geographic data and editorial notes.