UV Index for Marathon, FL

Current Marathon UV Index

0 (Low)

Last Updated 30 minutes ago

Hourly Marathon UV Index

The hourly Marathon, FL UV Index forecast for Tuesday, September 16th, 2025.

5 Day Hourly Marathon UV Index Forecast

Last Updated 10 hours ago

The UV index forecast for the next five days in Marathon, FL has no days reaching the extreme level and 2 days reaching the high or very high levels. The peak UV intensity in Marathon over the next five days will be 10 on Thursday, September 18th at 2:00 pm.

The UV index forecast for Tuesday, September 16th in Marathon, FL is below.

Time UV Index Risk
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 2.9
Low
11am 5.6
Moderate
12pm 8.2
Very High
1pm 8.4
Very High
2pm 8.6
Very High
3pm 7.5
High
4pm 5.1
Moderate
5pm 2.6
Low
6pm 0.9
Low
7pm 0.1
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, September 17th in Marathon, 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 0.2
Low
9am 0.4
Low
10am 1.2
Low
11am 2.1
Low
12pm 3.2
Moderate
1pm 1.6
Low
2pm 1.1
Low
3pm 1
Low
4pm 0.6
Low
5pm 0.3
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 Thursday, September 18th in Marathon, 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 0.2
Low
10am 0.6
Low
11am 1.6
Low
12pm 3.1
Moderate
1pm 8.8
Very High
2pm 10
Very High
3pm 5
Moderate
4pm 5
Moderate
5pm 2.8
Low
6pm 1
Low
7pm 0.2
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Friday, September 19th in Marathon, 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 0.2
Low