2.7 (Low)
Last Updated 22 minutes ago
The hourly San Bruno, CA UV Index forecast for Monday, October 20th, 2025.
Last Updated 23 minutes ago
The UV index forecast for the next five days in San Bruno, CA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in San Bruno over the next five days will be 4.5 on Thursday, October 23rd at 1:00 pm.
The UV index forecast for Monday, October 20th in San Bruno, CA is below.
| Time | UV Index | Risk |
|---|---|---|
| 12pm | 3.9 |
Moderate |
| 1pm | 4.4 |
Moderate |
| 2pm | 4.2 |
Moderate |
| 3pm | 3.1 |
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 San Bruno, 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 | 2.6 |
Low |
| 12pm | 3.7 |
Moderate |
| 1pm | 4.2 |
Moderate |
| 2pm | 4 |
Moderate |
| 3pm | 3 |
Moderate |
| 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 San Bruno, 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 |
Low |
| 11am | 1.9 |
Low |
| 12pm | 3.3 |
Moderate |
| 1pm | 4.3 |
Moderate |
| 2pm | 4 |
Moderate |
| 3pm | 2.9 |
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 Thursday, October 23rd in San Bruno, 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 | 1.4 |
Low |
| 11am | 2.7 |
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 | 0.1 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Friday, October 24th in San Bruno, 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 |