0 (Low)
Last Updated 12 minutes ago
The hourly Vista Santa Rosa, CA UV Index forecast for Wednesday, September 17th, 2025.
Last Updated 13 hours ago
The UV index forecast for the next five days in Vista Santa Rosa, CA has no days reaching the extreme level and 3 days reaching the high or very high levels. The peak UV intensity in Vista Santa Rosa over the next five days will be 9.2 on Thursday, September 18th at 1:00 pm.
The UV index forecast for Wednesday, September 17th in Vista Santa Rosa, CA is below.
| Time | UV Index | Risk |
|---|---|---|
| 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 | 1.8 |
Low |
| 10am | 4 |
Moderate |
| 11am | 4.4 |
Moderate |
| 12pm | 6.7 |
High |
| 1pm | 7.7 |
High |
| 2pm | 4.5 |
Moderate |
| 3pm | 4.8 |
Moderate |
| 4pm | 3 |
Moderate |
| 5pm | 1.2 |
Low |
| 6pm | 0.3 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Thursday, September 18th in Vista Santa Rosa, CA 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 | 0.7 |
Low |
| 9am | 2.2 |
Low |
| 10am | 4.5 |
Moderate |
| 11am | 7 |
High |
| 12pm | 8.9 |
Very High |
| 1pm | 9.2 |
Very High |
| 2pm | 8.1 |
Very High |
| 3pm | 5.9 |
Moderate |
| 4pm | 3.4 |
Moderate |
| 5pm | 1.4 |
Low |
| 6pm | 0.3 |
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 Vista Santa Rosa, CA 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 | 0.6 |
Low |
| 9am | 2.1 |
Low |
| 10am | 4.4 |
Moderate |
| 11am | 6.8 |
High |
| 12pm | 8.8 |
Very High |
| 1pm | 9.2 |
Very High |
| 2pm | 8.2 |
Very High |
| 3pm | 5.9 |
Moderate |
| 4pm | 3.4 |
Moderate |
| 5pm | 1.3 |
Low |
| 6pm | 0.3 |
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 Vista Santa Rosa, CA is below.
| Time | UV Index | Risk |
|---|---|---|
| 12am | 0 |
Low |
| 1am | 0 |
Low |
| 2am | 0 |
Low |
| 3am | 0 |
Low |
| 4am | 0 |
Low |
| 5am | 0 |
Low |