4.5 (Moderate)
Last Updated 3 minutes ago
The hourly Upper Merion, PA UV Index forecast for Thursday, September 18th, 2025.
Last Updated 1 hour ago
The UV index forecast for the next five days in Upper Merion, PA has no days reaching the extreme level and 2 days reaching the high or very high levels. The peak UV intensity in Upper Merion over the next five days will be 6.3 on Saturday, September 20th at 1:00 pm.
The UV index forecast for Thursday, September 18th in Upper Merion, PA is below.
| Time | UV Index | Risk |
|---|---|---|
| 4pm | 2.7 |
Low |
| 5pm | 1.3 |
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 Friday, September 19th in Upper Merion, 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 | 0.3 |
Low |
| 9am | 1.2 |
Low |
| 10am | 2.6 |
Low |
| 11am | 4.3 |
Moderate |
| 12pm | 5.7 |
Moderate |
| 1pm | 6.2 |
High |
| 2pm | 5.8 |
Moderate |
| 3pm | 4.4 |
Moderate |
| 4pm | 2.7 |
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 Upper Merion, 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 | 0.3 |
Low |
| 9am | 1.2 |
Low |
| 10am | 2.6 |
Low |
| 11am | 4.3 |
Moderate |
| 12pm | 5.7 |
Moderate |
| 1pm | 6.3 |
High |
| 2pm | 5.8 |
Moderate |
| 3pm | 4.4 |
Moderate |
| 4pm | 2.7 |
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 Sunday, September 21st in Upper Merion, 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 | 0.1 |
Low |
| 9am | 0.4 |
Low |
| 10am | 0.8 |
Low |
| 11am | 1.2 |
Low |
| 12pm | 1.6 |
Low |
| 1pm | 1.6 |
Low |
| 2pm | 1.3 |
Low |
| 3pm | 0.9 |
Low |
| 4pm | 0.6 |
Low |
| 5pm | 0.4 |
Low |
| 6pm | 0.1 |
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 Upper Merion, 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 | 0.1 |
Low |