As of 11:34 AM CDT on September 18, 2025, out of 12 cities in Stephenson County, IL in our database, 7 cities (58%) have a UV Index reading of Low, while 5 cities (42%) have a UV Index reading of Moderate. The city with the highest UV Index reading right now is Dakota, IL with a reading of 4.2.
Over the next 24 hours, the highest UV Index reading in Stephenson County, IL is expected to be 4.2 in Dakota between 11:00 AM - 12:00 PM CDT today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |