Stillwater UV Index Forecast
(UV forecast courtesy of and Copyright © KNMI/ESA (http://www.temis.nl/). Used with permission.)
UV forecast: Apr 19 2025 is 8.2 Very High
UV forecast: Apr 20 2025 is 7.1 High
UV forecast: Apr 21 2025 is 7.7 High
UV forecast: Apr 22 2025 is 7.7 High
UV forecast: Apr 23 2025 is 8.1 Very High
UV forecast: Apr 24 2025 is 8.4 Very High
What is the UV Index?The UV Index provides a daily forecast of the expected risk of overexposure to the sun. The Index predicts UV intensity levels on a scale of 0 to 11+, where 0 indicates a minimal risk of overexposure and 11+ means a very high risk. Some exposure to sunlight can be enjoyable; however, too much could be dangerous. Overexposure to the ultraviolet (UV) rays of the sun radiation can cause immediate effects, such as sunburn, and long-term problems, such as skin cancer and cataracts. The UV Index, which was developed by the National Weather Service and the U.S. Environmental Protection Agency (EPA), provides important information to help you plan your outdoor activities to prevent overexposure to sun rays.
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| UV Index | Category | Sunburn Time |
| over 9 | extreme | less than 15 minutes |
| 7-9 | high | about 20 minutes |
| 4-7 | medium | about 30 minutes |
| 0-4 | low | more than 1 hour |
National UV Index
