Peak UV index by city
| City | Population | Peak UV | Exposure | UV 3+ hours |
|---|---|---|---|---|
| Boise | 238,429 | 2 | Low | Below 3 all day |
| Meridian | 142,988 | 2 | Low | Below 3 all day |
| Nampa | 120,384 | 2 | Low | Below 3 all day |
| Caldwell | 76,629 | 2 | Low | Below 3 all day |
| Idaho Falls | 71,785 | 2 | Low | Below 3 all day |
| Pocatello | 58,771 | 2 | Low | Below 3 all day |
| Coeur d'Alene | 58,179 | 2 | Low | Below 3 all day |
| Twin Falls | 56,216 | 2 | Low | Below 3 all day |
| Post Falls | 46,715 | 2 | Low | Below 3 all day |
| Rexburg | 40,334 | 2 | Low | Below 3 all day |
| Lewiston | 34,717 | 2 | Low | Below 3 all day |
| Eagle | 34,658 | 2 | Low | Below 3 all day |
| Kuna | 31,525 | 2 | Low | Below 3 all day |
| Moscow | 26,721 | 2 | Low | Below 3 all day |
UV 3+ hours show the window from the first forecast hour at 3 or above to the end of the last. The EPA recommends sun protection at UV 3 and above. Open a city for its current-hour forecast and hourly chart. Forecast sources and limitations.