0 (Low)
Last Updated 22 minutes ago
The hourly Rialto, CA UV Index forecast for Sunday, December 7th, 2025.
Last Updated 1 day ago
The UV index forecast for the next five days in Rialto, CA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Rialto over the next five days will be 3.2 on Sunday, December 7th at 12:00 pm.
The UV index forecast for Sunday, December 7th in Rialto, CA is below.
| Time | UV Index | Risk |
|---|---|---|
| 3am | 0 |
Low |
| 4am | 0 |
Low |
| 5am | 0 |
Low |
| 6am | 0 |
Low |
| 7am | 0 |
Low |
| 8am | 0.4 |
Low |
| 9am | 1.1 |
Low |
| 10am | 2.1 |
Low |
| 11am | 3 |
Moderate |
| 12pm | 3.2 |
Moderate |
| 1pm | 2.7 |
Low |
| 2pm | 1.7 |
Low |
| 3pm | 0.8 |
Low |
| 4pm | 0.2 |
Low |
| 5pm | 0 |
Low |
| 6pm | 0 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Monday, December 8th in Rialto, CA is below.
| Time | UV Index | Risk |
|---|---|---|
| 12am | 0 |
Low |
| 1am | 0 |
Low |
| 2am | 0 |
Low |
| 3am | 0 |
Low |
| 4am | 0 |
Low |