4.2 (Moderate)
Last Updated 9 minutes ago
The hourly Castle Hill, CA UV Index forecast for Friday, October 17th, 2025.
Last Updated 3 hours ago
The UV index forecast for the next five days in Castle Hill, CA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Castle Hill over the next five days will be 4.9 on Saturday, October 18th at 1:00 pm.
The UV index forecast for Friday, October 17th in Castle Hill, CA is below.
| Time | UV Index | Risk |
|---|---|---|
| 3pm | 3.1 |
Moderate |
| 4pm | 1.8 |
Low |
| 5pm | 0.8 |
Low |
| 6pm | 0.2 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Saturday, October 18th in Castle Hill, 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 |
Low |
| 9am | 0.5 |
Low |
| 10am | 1.6 |
Low |
| 11am | 3 |
Moderate |
| 12pm | 4.3 |
Moderate |
| 1pm | 4.9 |
Moderate |
| 2pm | 4.6 |
Moderate |
| 3pm | 3.4 |
Moderate |
| 4pm | 2 |
Low |
| 5pm | 0.8 |
Low |
| 6pm | 0.2 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Sunday, October 19th in Castle Hill, 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 |
Low |
| 9am | 0.5 |
Low |
| 10am | 1.4 |
Low |
| 11am | 2.8 |
Low |
| 12pm | 4 |
Moderate |
| 1pm | 4.5 |
Moderate |
| 2pm | 4.2 |
Moderate |
| 3pm | 3.2 |
Moderate |
| 4pm | 1.8 |
Low |
| 5pm | 0.7 |
Low |
| 6pm | 0.2 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Monday, October 20th in Castle Hill, 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 |
Low |
| 9am | 0.5 |
Low |
| 10am | 1.4 |
Low |
| 11am | 2.7 |
Low |
| 12pm | 3.8 |
Moderate |
| 1pm | 4.4 |
Moderate |
| 2pm | 4 |
Moderate |
| 3pm | 3 |
Moderate |
| 4pm | 1.8 |
Low |
| 5pm | 0.7 |
Low |
| 6pm | 0.2 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Tuesday, October 21st in Castle Hill, 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 |