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Last Updated 44 minutes ago
The hourly Mertztown, PA UV Index forecast for Friday, October 3rd, 2025.
Last Updated 1 day ago
The UV index forecast for the next five days in Mertztown, PA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Mertztown over the next five days will be 5.4 on Saturday, October 4th at 1:00 pm.
The UV index forecast for Friday, October 3rd in Mertztown, PA is below.
| Time | UV Index | Risk |
|---|---|---|
| 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 | 3.6 |
Moderate |
| 12pm | 4.5 |
Moderate |
| 1pm | 5.2 |
Moderate |
| 2pm | 5.1 |
Moderate |
| 3pm | 3.8 |
Moderate |
| 4pm | 2.3 |
Low |
| 5pm | 1 |
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 Saturday, October 4th in Mertztown, PA 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 |
Low |
| 11am | 3.6 |
Moderate |
| 12pm | 4.9 |
Moderate |
| 1pm | 5.4 |
Moderate |
| 2pm | 5 |
Moderate |
| 3pm | 3.8 |
Moderate |
| 4pm | 2.2 |
Low |
| 5pm | 0.9 |
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 Sunday, October 5th in Mertztown, PA 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 |