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Last Updated 34 minutes ago
The hourly San Francisco, CA UV Index forecast for Friday, June 20th, 2025.
Last Updated 16 hours ago
The UV index forecast for the next five days in San Francisco, CA has no days reaching the extreme level and 3 days reaching the high or very high levels. The peak UV intensity in San Francisco over the next five days will be 9.8 on Friday, June 20th at 1:00 pm.
The UV index forecast for Friday, June 20th in San Francisco, CA is below.
| Time | UV Index | Risk |
|---|---|---|
| 4am | 0 |
Low |
| 5am | 0 |
Low |
| 6am | 0 |
Low |
| 7am | 0.3 |
Low |
| 8am | 1.1 |
Low |
| 9am | 2.4 |
Low |
| 10am | 4.8 |
Moderate |
| 11am | 6.7 |
High |
| 12pm | 9 |
Very High |
| 1pm | 9.8 |
Very High |
| 2pm | 9.4 |
Very High |
| 3pm | 7.8 |
High |
| 4pm | 5.6 |
Moderate |
| 5pm | 3.4 |
Moderate |
| 6pm | 1.6 |
Low |
| 7pm | 0.5 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Saturday, June 21st 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 | 0.3 |
Low |
| 8am | 1.1 |
Low |
| 9am | 2.5 |
Low |
| 10am | 4.4 |
Moderate |
| 11am | 6.5 |
High |
| 12pm | 8.2 |
Very High |
| 1pm | 8.9 |
Very High |
| 2pm | 8.5 |
Very High |
| 3pm | 7 |
High |
| 4pm | 5 |
Moderate |
| 5pm | 3 |
Moderate |
| 6pm | 1.4 |
Low |
| 7pm | 0.5 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Sunday, June 22nd 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 | 0.3 |
Low |
| 8am | 1 |
Low |
| 9am | 2.4 |
Low |
| 10am | 4.4 |
Moderate |
| 11am | 6.4 |
High |
| 12pm | 8 |
Very High |
| 1pm | 8.8 |
Very High |
| 2pm | 8.4 |
Very High |
| 3pm | 6.9 |
High |
| 4pm | 4.9 |
Moderate |
| 5pm | 3 |
Moderate |
| 6pm | 1.4 |
Low |
| 7pm | 0.5 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Monday, June 23rd 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 |