0 (Low)
Last Updated 53 minutes ago
The hourly Johnsburg, IL UV Index forecast for Tuesday, August 19th, 2025.
Last Updated 9 hours ago
The UV index forecast for the next five days in Johnsburg, IL has no days reaching the extreme level and 3 days reaching the high or very high levels. The peak UV intensity in Johnsburg over the next five days will be 8.7 on Thursday, August 21st at 1:00 pm.
The UV index forecast for Tuesday, August 19th in Johnsburg, IL is below.
| Time | UV Index | Risk |
|---|---|---|
| 11pm | 0 |
Low |
The UV index forecast for Wednesday, August 20th in Johnsburg, 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 | 0.2 |
Low |
| 8am | 0.9 |
Low |
| 9am | 2.3 |
Low |
| 10am | 4.3 |
Moderate |
| 11am | 6.4 |
High |
| 12pm | 7 |
High |
| 1pm | 5.7 |
Moderate |
| 2pm | 4.6 |
Moderate |
| 3pm | 3.8 |
Moderate |
| 4pm | 1.9 |
Low |
| 5pm | 1.3 |
Low |
| 6pm | 0.7 |
Low |
| 7pm | 0.2 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Thursday, August 21st in Johnsburg, 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 | 0.2 |
Low |
| 8am | 0.9 |
Low |
| 9am | 2.4 |
Low |
| 10am | 4.4 |
Moderate |
| 11am | 6.6 |
High |
| 12pm | 8.2 |
Very High |
| 1pm | 8.7 |
Very High |
| 2pm | 8 |
Very High |
| 3pm | 6.2 |
High |
| 4pm | 4 |
Moderate |
| 5pm | 2.1 |
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 Friday, August 22nd in Johnsburg, 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 | 0.2 |
Low |
| 8am | 0.9 |
Low |
| 9am | 2.1 |
Low |
| 10am | 3.7 |
Moderate |
| 11am | 6.4 |
High |
| 12pm | 7.9 |
High |
| 1pm | 7.3 |
High |
| 2pm | 7.8 |
High |
| 3pm | 6.1 |
High |
| 4pm | 3.9 |
Moderate |
| 5pm | 2 |
Low |
| 6pm | 0.7 |
Low |
| 7pm | 0.1 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Saturday, August 23rd in Johnsburg, 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 | 0.2 |
Low |