0 (Low)
Last Updated 53 minutes ago
The hourly Fountain Valley, CA UV Index forecast for Tuesday, August 19th, 2025.
Last Updated 11 hours ago
The UV index forecast for the next five days in Fountain Valley, CA has no days reaching the extreme level and 4 days reaching the high or very high levels. The peak UV intensity in Fountain Valley over the next five days will be 10.4 on Tuesday, August 19th at 1:00 pm.
The UV index forecast for Tuesday, August 19th in Fountain Valley, CA is below.
| Time | UV Index | Risk |
|---|---|---|
| 11pm | 0 |
Low |
The UV index forecast for Wednesday, August 20th in Fountain Valley, 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 | 0.2 |
Low |
| 8am | 1 |
Low |
| 9am | 2.7 |
Low |
| 10am | 5.2 |
Moderate |
| 11am | 7.7 |
High |
| 12pm | 9.3 |
Very High |
| 1pm | 9.6 |
Very High |
| 2pm | 9.1 |
Very High |
| 3pm | 6.9 |
High |
| 4pm | 4.3 |
Moderate |
| 5pm | 2 |
Low |
| 6pm | 0.7 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Thursday, August 21st in Fountain Valley, 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 | 0.2 |
Low |
| 8am | 0.8 |
Low |
| 9am | 2.4 |
Low |
| 10am | 4.8 |
Moderate |
| 11am | 7.2 |
High |
| 12pm | 9.3 |
Very High |
| 1pm | 9.9 |
Very High |
| 2pm | 9 |
Very High |
| 3pm | 6.9 |
High |
| 4pm | 4.3 |
Moderate |
| 5pm | 2 |
Low |
| 6pm | 0.6 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Friday, August 22nd in Fountain Valley, 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 | 0.2 |
Low |
| 8am | 0.8 |
Low |
| 9am | 2.4 |
Low |
| 10am | 5 |
Moderate |
| 11am | 7.5 |
High |
| 12pm | 9.3 |
Very High |
| 1pm | 9.9 |
Very High |
| 2pm | 9 |
Very High |
| 3pm | 6.8 |
High |
| 4pm | 4.2 |
Moderate |
| 5pm | 2 |
Low |
| 6pm | 0.6 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Saturday, August 23rd in Fountain Valley, 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 |