On this page, you can find the current UV Index and hourly 5 day UV Index forecast for Riley, McHenry County, Illinois (IL). The Ultraviolet Index forecast, which measures the radiation from the sun that reaches the Earth's surface is updated daily.
(Updated 11 minutes ago.)
As of 2:11 AM CST, the UV Index in Riley, IL is 0 (Low).
The UV Index is expected to rise to 0.1 between 8:00 AM - 9:00 AM CST today.
UV Index Data sourced from the NOAA.
As of 2:11 AM CST today in Riley, IL, the UV Index is currently at 0 which means there is no significant ultraviolet radiation from the sun. However, as the day progresses, the UV index is expected to rise.
The UV Index will rise to 0.1 between 8:00 AM - 9:00 AM, still considered low. The UV Index will stay low all day, peaking between 12:00 PM and 1:00 PM with a reading of 1.6.
After reaching its peak for the day, the UV Index will gradually decline through the afternoon and evening. The UV Index will return to low levels of 1.4 at 1:00 PM. As the day transitions into the night, the UV Index will drop back down to 0 at 5:00 PM.
| Time Range | UV Index | Risk |
|---|---|---|
| 12:00 AM - 12:00 AM (CST) | 0 - 1.6 | Low |
| Time Range | UV Index | Risk |
|---|---|---|
| 12:00 AM - 12:00 AM (CST) | 0 - 1.5 | Low |
| Time | UV Index | Risk |
|---|---|---|
| 2:00 AM - 3:00 AM (Now, CST) | 0 | Low |
| 3:00 AM - 4:00 AM | 0 | Low |
| 4:00 AM - 5:00 AM | 0 | Low |
| 5:00 AM - 6:00 AM | 0 | Low |
| 6:00 AM - 7:00 AM | 0 | Low |
| 7:00 AM - 8:00 AM | 0 | Low |
| 8:00 AM - 9:00 AM | 0.1 | Low |
| 9:00 AM - 10:00 AM | 0.3 | Low |
| 10:00 AM - 11:00 AM | 0.7 | Low |
| 11:00 AM - 12:00 PM | 1.2 | Low |
| 12:00 PM - 1:00 PM | 1.6 | Low |
| 1:00 PM - 2:00 PM | 1.4 | Low |
| 2:00 PM - 3:00 PM | 0.9 | Low |
| 3:00 PM - 4:00 PM | 0.5 | Low |
| 4:00 PM - 5:00 PM | 0.1 | Low |
| 5:00 PM - 6:00 PM | 0 | Low |
| 6:00 PM - 7:00 PM | 0 | Low |
| 7:00 PM - 8:00 PM | 0 | Low |
| 8:00 PM - 9:00 PM | 0 | Low |
| 9:00 PM - 10:00 PM | 0 | Low |
| 10:00 PM - 11:00 PM | 0 | Low |
| 11:00 PM - 12:00 AM | 0 | Low |