As of 3:43 AM CST on November 21, 2024, all 40 cities in McHenry County, IL in our database have a UV Index reading of 0, indicating no radiation from the sun.
Over the next 24 hours, the highest UV Index reading in McHenry County, IL is expected to be 0.7 in Huntley between 11:00 AM - 12:00 PM CST today.
| Range | 0 - 2 | 3 - 5 | 6 - 7 | 8 - 10 | 11+ |
|---|---|---|---|---|---|
| Color | |||||
| Risk | Low | Moderate | High | Very High | Extreme |