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Last Updated 10 minutes ago
The hourly Lake San Marcos, CA UV Index forecast for Monday, September 15th, 2025.
Last Updated 16 hours ago
The UV index forecast for the next five days in Lake San Marcos, CA has no days reaching the extreme level and 3 days reaching the high or very high levels. The peak UV intensity in Lake San Marcos over the next five days will be 8.6 on Wednesday, September 17th at 1:00 pm.
The UV index forecast for Monday, September 15th in Lake San Marcos, CA is below.
| Time | UV Index | Risk |
|---|---|---|
| 4am | 0 |
Low |
| 5am | 0 |
Low |
| 6am | 0 |
Low |
| 7am | 0 |
Low |
| 8am | 0.6 |
Low |
| 9am | 1.8 |
Low |
| 10am | 3.8 |
Moderate |
| 11am | 6.1 |
High |
| 12pm | 7.8 |
High |
| 1pm | 8.4 |
Very High |
| 2pm | 7.4 |
High |
| 3pm | 5.5 |
Moderate |
| 4pm | 3.2 |
Moderate |
| 5pm | 1.4 |
Low |
| 6pm | 0.3 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Tuesday, September 16th in Lake San Marcos, 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 | 1.9 |
Low |
| 10am | 3.9 |
Moderate |
| 11am | 6.2 |
High |
| 12pm | 7.9 |
High |
| 1pm | 8.4 |
Very High |
| 2pm | 7.5 |
High |
| 3pm | 5.5 |
Moderate |
| 4pm | 3.2 |
Moderate |
| 5pm | 1.3 |
Low |
| 6pm | 0.3 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Wednesday, September 17th in Lake San Marcos, 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 | 1.9 |
Low |
| 10am | 4 |
Moderate |
| 11am | 6.4 |
High |
| 12pm | 8.1 |
Very High |
| 1pm | 8.6 |
Very High |
| 2pm | 7.6 |
High |
| 3pm | 5.6 |
Moderate |
| 4pm | 3.2 |
Moderate |
| 5pm | 1.3 |
Low |
| 6pm | 0.3 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Thursday, September 18th in Lake San Marcos, 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 |