4.2 (Moderate)
Last Updated 32 minutes ago
The hourly Sunnyvale, CA UV Index forecast for Saturday, October 18th, 2025.
Last Updated 1 hour ago
The UV index forecast for the next five days in Sunnyvale, CA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Sunnyvale over the next five days will be 4.8 on Saturday, October 18th at 1:00 pm.
The UV index forecast for Saturday, October 18th in Sunnyvale, CA is below.
| Time | UV Index | Risk |
|---|---|---|
| 1pm | 4.8 |
Moderate |
| 2pm | 4.5 |
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 Sunnyvale, 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 | 1.5 |
Low |
| 11am | 2.8 |
Low |
| 12pm | 4 |
Moderate |
| 1pm | 4.6 |
Moderate |
| 2pm | 4.3 |
Moderate |
| 3pm | 3.2 |
Moderate |
| 4pm | 1.9 |
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 Monday, October 20th in Sunnyvale, 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 | 3.9 |
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 Tuesday, October 21st in Sunnyvale, 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 | 0.4 |
Low |
| 10am | 1.3 |
Low |
| 11am | 2.5 |
Low |
| 12pm | 3.6 |
Moderate |
| 1pm | 4 |
Moderate |
| 2pm | 3.5 |
Moderate |
| 3pm | 2.7 |
Low |
| 4pm | 1.6 |
Low |
| 5pm | 0.6 |
Low |
| 6pm | 0.1 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Wednesday, October 22nd in Sunnyvale, 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 |