UV Index for Mason City, IL

Current Mason City UV Index

3 (Moderate)

Last Updated 24 minutes ago

Hourly Mason City UV Index

The hourly Mason City, IL UV Index forecast for Saturday, September 13th, 2025.

5 Day Hourly Mason City UV Index Forecast

Last Updated 21 hours ago

The UV index forecast for the next five days in Mason City, IL has no days reaching the extreme level and 3 days reaching the high or very high levels. The peak UV intensity in Mason City over the next five days will be 6.9 on Saturday, September 13th at 1:00 pm.

The UV index forecast for Saturday, September 13th in Mason City, IL is below.

Time UV Index Risk
11am 4.5
Moderate
12pm 6.3
High
1pm 6.9
High
2pm 6.2
High
3pm 4.8
Moderate
4pm 2.9
Low
5pm 1.4
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 14th in Mason City, IL 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 0.4
Low
9am 1.4
Low
10am 2.9
Low
11am 4.8
Moderate
12pm 6.2
High
1pm 6.8
High
2pm 6.3
High
3pm 4.8
Moderate
4pm 2.9
Low
5pm 1.4
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 Monday, September 15th in Mason City, IL 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 0.4
Low
9am 1.2
Low
10am 2.6
Low
11am 4.3
Moderate
12pm 5.7
Moderate
1pm 6.4
High
2pm 5.5
Moderate
3pm 4.2
Moderate
4pm 2.5
Low
5pm 1.1
Low
6pm 0.3
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, September 16th in Mason City, IL 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