As of 12:56 PM CDT on August 18, 2026, all 10 cities in Calumet County, WI in our database have a UV Index reading of Moderate. The city with the highest UV Index reading right now is New Holstein, WI with a reading of 4.6.
Over the next 24 hours, the highest UV Index reading in Calumet County, WI is expected to be 5.3 in Harrison between 2:00 PM - 3:00 PM CDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |