As of 4:08 PM MDT on September 17, 2025, all 2 cities in Madison County, ID in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Rexburg, ID with a reading of 3.6.
Over the next 24 hours, the highest UV Index reading in Madison County, ID is expected to be 6.6 in Rexburg between 1:00 PM - 2:00 PM MDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |