5.1 (Moderate)
Last Updated 42 minutes ago
The hourly Walnut Creek, CA UV Index forecast for Sunday, August 31st, 2025.
Last Updated 41 minutes ago
The UV index forecast for the next five days in Walnut Creek, CA has no days reaching the extreme level and 4 days reaching the high or very high levels. The peak UV intensity in Walnut Creek over the next five days will be 7.8 on Wednesday, September 3rd at 1:00 pm.
The UV index forecast for Sunday, August 31st in Walnut Creek, CA is below.
| Time | UV Index | Risk |
|---|---|---|
| 12pm | 6.6 |
High |
| 1pm | 7.4 |
High |
| 2pm | 7.1 |
High |
| 3pm | 5.4 |
Moderate |
| 4pm | 3.8 |
Moderate |
| 5pm | 1.9 |
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 Monday, September 1st in Walnut Creek, 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 | 0.4 |
Low |
| 9am | 1.4 |
Low |
| 10am | 3.1 |
Moderate |
| 11am | 5.1 |
Moderate |
| 12pm | 6.4 |
High |
| 1pm | 7.1 |
High |
| 2pm | 6.7 |
High |
| 3pm | 5.4 |
Moderate |
| 4pm | 3.5 |
Moderate |
| 5pm | 1.7 |
Low |
| 6pm | 0.6 |
Low |
| 7pm | 0.1 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Tuesday, September 2nd in Walnut Creek, 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 | 0.4 |
Low |
| 9am | 1.2 |
Low |
| 10am | 2.6 |
Low |
| 11am | 4.3 |
Moderate |
| 12pm | 5.4 |
Moderate |
| 1pm | 6.3 |
High |
| 2pm | 6 |
High |
| 3pm | 4.8 |
Moderate |
| 4pm | 3.4 |
Moderate |
| 5pm | 1.8 |
Low |
| 6pm | 0.6 |
Low |
| 7pm | 0.1 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Wednesday, September 3rd in Walnut Creek, 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 | 0.4 |
Low |
| 9am | 1.3 |
Low |
| 10am | 3 |
Moderate |
| 11am | 4.8 |
Moderate |
| 12pm | 6.9 |
High |
| 1pm | 7.8 |
High |
| 2pm | 7 |
High |
| 3pm | 5 |
Moderate |
| 4pm | 3.5 |
Moderate |
| 5pm | 1.9 |
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 Thursday, September 4th in Walnut Creek, 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 |