4.7 (Moderate)
Last Updated 14 minutes ago
The hourly Crystal Lake, IA UV Index forecast for Monday, September 1st, 2025.
Last Updated 1 hour ago
The UV index forecast for the next five days in Crystal Lake, IA has no days reaching the extreme level and 2 days reaching the high or very high levels. The peak UV intensity in Crystal Lake over the next five days will be 6.4 on Tuesday, September 2nd at 2:00 pm.
The UV index forecast for Monday, September 1st in Crystal Lake, IA is below.
| Time | UV Index | Risk |
|---|---|---|
| 3pm | 4.9 |
Moderate |
| 4pm | 3.6 |
Moderate |
| 5pm | 2 |
Low |
| 6pm | 0.8 |
Low |
| 7pm | 0.2 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Tuesday, September 2nd in Crystal Lake, IA is below.
| Time | UV Index | Risk |
|---|---|---|
| 12am | 0 |
Low |
| 1am | 0 |
Low |
| 2am | 0 |
Low |
| 3am | 0 |
Low |
| 4am | 0 |
Low |
| 5am | 0 |
Low |
| 6am | 0 |
Low |
| 7am | 0 |
Low |
| 8am | 0.2 |
Low |
| 9am | 0.4 |
Low |
| 10am | 0.2 |
Low |
| 11am | 0.6 |
Low |
| 12pm | 2.3 |
Low |
| 1pm | 2.8 |
Low |
| 2pm | 6.4 |
High |
| 3pm | 5.3 |
Moderate |
| 4pm | 3.4 |
Moderate |
| 5pm | 1.4 |
Low |
| 6pm | 0.8 |
Low |
| 7pm | 0.2 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Wednesday, September 3rd in Crystal Lake, IA is below.
| Time | UV Index | Risk |
|---|---|---|
| 12am | 0 |
Low |
| 1am | 0 |
Low |
| 2am | 0 |
Low |
| 3am | 0 |
Low |
| 4am | 0 |
Low |
| 5am | 0 |
Low |
| 6am | 0 |
Low |
| 7am | 0 |
Low |
| 8am | 0.2 |
Low |
| 9am | 0.2 |
Low |
| 10am | 0.4 |
Low |
| 11am | 2 |
Low |
| 12pm | 4.8 |
Moderate |
| 1pm | 5.3 |
Moderate |
| 2pm | 4.1 |
Moderate |
| 3pm | 3.4 |
Moderate |
| 4pm | 2 |
Low |
| 5pm | 1.1 |
Low |
| 6pm | 0.2 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Thursday, September 4th in Crystal Lake, IA is below.
| Time | UV Index | Risk |
|---|---|---|
| 12am | 0 |
Low |
| 1am | 0 |
Low |
| 2am | 0 |
Low |
| 3am | 0 |
Low |
| 4am | 0 |
Low |
| 5am | 0 |
Low |
| 6am | 0 |
Low |
| 7am | 0 |
Low |
| 8am | 0.3 |
Low |
| 9am | 1 |
Low |
| 10am | 2.4 |
Low |
| 11am | 4 |
Moderate |
| 12pm | 5.5 |
Moderate |
| 1pm | 6.3 |
High |
| 2pm | 6 |
High |
| 3pm | 5 |
Moderate |
| 4pm | 3.4 |
Moderate |
| 5pm | 1.4 |
Low |
| 6pm | 0.4 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Friday, September 5th in Crystal Lake, IA is below.
| Time | UV Index | Risk |
|---|---|---|
| 12am | 0 |
Low |
| 1am | 0 |
Low |
| 2am | 0 |
Low |
| 3am | 0 |
Low |
| 4am | 0 |
Low |
| 5am | 0 |
Low |
| 6am | 0 |
Low |
| 7am | 0 |
Low |