UV Index for Grinnell, IA

Current Grinnell UV Index

0 (Low)

Last Updated 25 minutes ago

Hourly Grinnell UV Index

The hourly Grinnell, IA UV Index forecast for Monday, October 27th, 2025.

5 Day Hourly Grinnell UV Index Forecast

Last Updated 11 hours ago

The UV index forecast for the next five days in Grinnell, IA has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Grinnell over the next five days will be 2.5 on Wednesday, October 29th at 2:00 pm.

The UV index forecast for Monday, October 27th in Grinnell, IA 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
Low
9am 0.3
Low
10am 0.5
Low
11am 1
Low
12pm 1.2
Low
1pm 1.4
Low
2pm 1.6
Low
3pm 0.7
Low
4pm 0.3
Low
5pm 0.1
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, October 28th in Grinnell, 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
Low
9am 0
Low
10am 0.2
Low
11am 0.1
Low
12pm 0.4
Low
1pm 1
Low
2pm 0.7
Low
3pm 1.5
Low
4pm 0.4
Low
5pm 0.1
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, October 29th in Grinnell, 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
Low
9am 0
Low
10am 0
Low
11am 0.1
Low
12pm 0.2
Low
1pm 0.4
Low
2pm 2.5
Low
3pm 2
Low
4pm 1.1
Low
5pm 0.4
Low
6pm 0
Low
7pm 0
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Thursday, October 30th in Grinnell, 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