UV Index for St. Marks, FL

Current St. Marks UV Index

1.4 (Low)

Last Updated 56 minutes ago

Hourly St. Marks UV Index

The hourly St. Marks, FL UV Index forecast for Sunday, October 19th, 2025.

5 Day Hourly St. Marks UV Index Forecast

Last Updated 20 hours ago

The UV index forecast for the next five days in St. Marks, FL has no days reaching the extreme level and 2 days reaching the high or very high levels. The peak UV intensity in St. Marks over the next five days will be 6.4 on Tuesday, October 21st at 2:00 pm.

The UV index forecast for Sunday, October 19th in St. Marks, FL is below.

Time UV Index Risk
11am 2.4
Low
12pm 4.9
Moderate
1pm 2.8
Low
2pm 4.2
Moderate
3pm 2.6
Low
4pm 3
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 Monday, October 20th in St. Marks, FL 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
Low
9am 0.3
Low
10am 1.3
Low
11am 2.9
Low
12pm 4.6
Moderate
1pm 5.8
Moderate
2pm 6
High
3pm 5
Moderate
4pm 3.4
Moderate
5pm 1.7
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 Tuesday, October 21st in St. Marks, FL 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
Low
9am 0.4
Low
10am 1.4
Low
11am 3
Moderate
12pm 4.9
Moderate
1pm 6.2
High
2pm 6.4
High
3pm 5.4
Moderate
4pm 3.6
Moderate
5pm 1.8
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 Wednesday, October 22nd in St. Marks, FL 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
Low