7.7 (High)
Last Updated 24 minutes ago
The hourly San Francisco, CA UV Index forecast for Tuesday, August 26th, 2025.
Last Updated 2 hours ago
The UV index forecast for the next five days in San Francisco, CA has no days reaching the extreme level and 4 days reaching the high or very high levels. The peak UV intensity in San Francisco over the next five days will be 7.7 on Tuesday, August 26th at 1:00 pm.
The UV index forecast for Tuesday, August 26th in San Francisco, CA is below.
| Time | UV Index | Risk |
|---|---|---|
| 2pm | 7.4 |
High |
| 3pm | 6.2 |
High |
| 4pm | 4.5 |
Moderate |
| 5pm | 2.3 |
Low |
| 6pm | 0.8 |
Low |
| 7pm | 0.2 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Wednesday, August 27th in San Francisco, 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 | 0.6 |
Low |
| 9am | 1.7 |
Low |
| 10am | 3.6 |
Moderate |
| 11am | 5.8 |
Moderate |
| 12pm | 7 |
High |
| 1pm | 7.5 |
High |
| 2pm | 7.2 |
High |
| 3pm | 6 |
High |
| 4pm | 4 |
Moderate |
| 5pm | 2.2 |
Low |
| 6pm | 0.8 |
Low |
| 7pm | 0.2 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Thursday, August 28th in San Francisco, 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 | 0.5 |
Low |
| 9am | 1.7 |
Low |
| 10am | 3.6 |
Moderate |
| 11am | 5.7 |
Moderate |
| 12pm | 7 |
High |
| 1pm | 7.4 |
High |
| 2pm | 7 |
High |
| 3pm | 5.7 |
Moderate |
| 4pm | 3.8 |
Moderate |
| 5pm | 2 |
Low |
| 6pm | 0.8 |
Low |
| 7pm | 0.2 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Friday, August 29th in San Francisco, 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 | 0.5 |
Low |
| 9am | 1.7 |
Low |
| 10am | 3.6 |
Moderate |
| 11am | 5.7 |
Moderate |
| 12pm | 7.1 |
High |
| 1pm | 7.5 |
High |
| 2pm | 7 |
High |
| 3pm | 5.6 |
Moderate |
| 4pm | 3.7 |
Moderate |
| 5pm | 2 |
Low |
| 6pm | 0.8 |
Low |
| 7pm | 0.2 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Saturday, August 30th in San Francisco, 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 |