6.4 (High)
Last Updated 39 minutes ago
The hourly Princeton, IL UV Index forecast for Thursday, September 18th, 2025.
Last Updated 39 minutes ago
The UV index forecast for the next five days in Princeton, IL has no days reaching the extreme level and 1 day reaching the high or very high levels. The peak UV intensity in Princeton over the next five days will be 6.4 on Thursday, September 18th at 1:00 pm.
The UV index forecast for Thursday, September 18th in Princeton, IL is below.
| Time | UV Index | Risk |
|---|---|---|
| 2pm | 5.8 |
Moderate |
| 3pm | 4.4 |
Moderate |
| 4pm | 2.2 |
Low |
| 5pm | 0.3 |
Low |
| 6pm | 0.1 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Friday, September 19th in Princeton, IL 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 | 0.8 |
Low |
| 10am | 2.1 |
Low |
| 11am | 3.4 |
Moderate |
| 12pm | 4.4 |
Moderate |
| 1pm | 3.3 |
Moderate |
| 2pm | 3.8 |
Moderate |
| 3pm | 2.8 |
Low |
| 4pm | 2 |
Low |
| 5pm | 0.8 |
Low |
| 6pm | 0.1 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Saturday, September 20th in Princeton, IL 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 | 2.6 |
Low |
| 11am | 4 |
Moderate |
| 12pm | 5.3 |
Moderate |
| 1pm | 5.8 |
Moderate |
| 2pm | 5.3 |
Moderate |
| 3pm | 4.1 |
Moderate |
| 4pm | 2.5 |
Low |
| 5pm | 0.7 |
Low |
| 6pm | 0.1 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Sunday, September 21st in Princeton, IL 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 | 0.6 |
Low |
| 10am | 1.2 |
Low |
| 11am | 2.6 |
Low |
| 12pm | 4.3 |
Moderate |
| 1pm | 4.6 |
Moderate |
| 2pm | 3.7 |
Moderate |
| 3pm | 3 |
Moderate |
| 4pm | 1.7 |
Low |
| 5pm | 0.7 |
Low |
| 6pm | 0.1 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Monday, September 22nd in Princeton, IL 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 |