5.7 (Moderate)
Last Updated 8 minutes ago
The hourly Eureka, CA UV Index forecast for Thursday, September 18th, 2025.
Last Updated 2 hours ago
The UV index forecast for the next five days in Eureka, CA has no days reaching the extreme level and 1 day reaching the high or very high levels. The peak UV intensity in Eureka over the next five days will be 6.5 on Sunday, September 21st at 1:00 pm.
The UV index forecast for Thursday, September 18th in Eureka, CA is below.
| Time | UV Index | Risk |
|---|---|---|
| 2pm | 5.8 |
Moderate |
| 3pm | 5 |
Moderate |
| 4pm | 3.2 |
Moderate |
| 5pm | 0.9 |
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 Friday, September 19th in Eureka, 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 | 0.2 |
Low |
| 9am | 0.6 |
Low |
| 10am | 1.7 |
Low |
| 11am | 3.6 |
Moderate |
| 12pm | 5 |
Moderate |
| 1pm | 5.5 |
Moderate |
| 2pm | 5 |
Moderate |
| 3pm | 3.9 |
Moderate |
| 4pm | 2.5 |
Low |
| 5pm | 1.2 |
Low |
| 6pm | 0.4 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Saturday, September 20th in Eureka, 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 | 0.2 |
Low |
| 9am | 0.8 |
Low |
| 10am | 2.1 |
Low |
| 11am | 3.8 |
Moderate |
| 12pm | 5.2 |
Moderate |
| 1pm | 5.9 |
Moderate |
| 2pm | 5.6 |
Moderate |
| 3pm | 4.7 |
Moderate |
| 4pm | 3.1 |
Moderate |
| 5pm | 1.5 |
Low |
| 6pm | 0.5 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Sunday, September 21st in Eureka, 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 | 0.2 |
Low |
| 9am | 0.9 |
Low |
| 10am | 2.2 |
Low |
| 11am | 4 |
Moderate |
| 12pm | 5.6 |
Moderate |
| 1pm | 6.5 |
High |
| 2pm | 6.4 |
High |
| 3pm | 5.1 |
Moderate |
| 4pm | 3.3 |
Moderate |
| 5pm | 1.6 |
Low |
| 6pm | 0.5 |
Low |
| 7pm | 0 |
Low |
| 8pm | 0 |
Low |
| 9pm | 0 |
Low |
| 10pm | 0 |
Low |
| 11pm | 0 |
Low |
The UV index forecast for Monday, September 22nd in Eureka, 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 |