UV Index for Castalia, IA

Current Castalia UV Index

0 (Low)

Last Updated 21 minutes ago

Hourly Castalia UV Index

The hourly Castalia, IA UV Index forecast for Saturday, September 13th, 2025.

5 Day Hourly Castalia UV Index Forecast

Last Updated 14 hours ago

The UV index forecast for the next five days in Castalia, IA has no days reaching the extreme level and 2 days reaching the high or very high levels. The peak UV intensity in Castalia over the next five days will be 6.4 on Saturday, September 13th at 1:00 pm.

The UV index forecast for Saturday, September 13th in Castalia, IA is below.

Time UV Index Risk
4am 0
Low
5am 0
Low
6am 0
Low
7am 0
Low
8am 0.3
Low
9am 1.2
Low
10am 2.5
Low
11am 4.4
Moderate
12pm 5.8
Moderate
1pm 6.4
High
2pm 5.8
Moderate
3pm 4.8
Moderate
4pm 3.2
Moderate
5pm 1.6
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 Sunday, September 14th in Castalia, IA 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 1.1
Low
10am 1.8
Low
11am 4
Moderate
12pm 5.6
Moderate
1pm 6.4
High
2pm 6
High
3pm 4.8
Moderate
4pm 2.9
Low
5pm 1.4
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, September 15th in Castalia, IA 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 1
Low
10am 2.4
Low
11am 3.4
Moderate
12pm 4.8
Moderate
1pm 5.5
Moderate
2pm 5.4
Moderate
3pm 4.3
Moderate
4pm 2.8
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 Tuesday, September 16th in Castalia, IA 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