UV Index for St. Marys, PA

Current St. Marys UV Index

0 (Low)

Last Updated 14 minutes ago

Hourly St. Marys UV Index

The hourly St. Marys, PA UV Index forecast for Tuesday, September 16th, 2025.

5 Day Hourly St. Marys UV Index Forecast

Last Updated 8 hours ago

The UV index forecast for the next five days in St. Marys, PA has no days reaching the extreme level and 4 days reaching the high or very high levels. The peak UV intensity in St. Marys over the next five days will be 6.4 on Tuesday, September 16th at 1:00 pm.

The UV index forecast for Tuesday, September 16th in St. Marys, PA is below.

Time UV Index Risk
11pm 0
Low

The UV index forecast for Wednesday, September 17th in St. Marys, 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 0.9
Low
10am 2.3
Low
11am 4
Moderate
12pm 5.5
Moderate
1pm 6.3
High
2pm 6
High
3pm 4.8
Moderate
4pm 2.8
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 Thursday, September 18th in St. Marys, 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 0.9
Low
10am 2.2
Low
11am 3.9
Moderate
12pm 5.4
Moderate
1pm 6.2
High
2pm 6
High
3pm 4.8
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 Friday, September 19th in St. Marys, 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 0.9
Low
10am 2.2
Low
11am 3.9
Moderate
12pm 5.4
Moderate
1pm 6.2
High
2pm 6
High
3pm 4.8
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 Saturday, September 20th in St. Marys, 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