As of 3:56 PM CDT on September 17, 2025, all 8 cities in Big Stone County, MN in our database have a UV Index reading of Low. The city with the highest UV Index reading right now is Johnson, MN with a reading of 1.
Over the next 24 hours, the highest UV Index reading in Big Stone County, MN is expected to be 2.4 in Johnson between 2:00 PM - 3:00 PM CDT tomorrow.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |