UV Index for Grenville, SD

Current Grenville UV Index

0 (Low)

Last Updated 15 minutes ago

Hourly Grenville UV Index

The hourly Grenville, SD UV Index forecast for Wednesday, September 3rd, 2025.

5 Day Hourly Grenville UV Index Forecast

Last Updated 12 hours ago

The UV index forecast for the next five days in Grenville, SD has no days reaching the extreme level and 1 day reaching the high or very high levels. The peak UV intensity in Grenville over the next five days will be 6.1 on Thursday, September 4th at 1:00 pm.

The UV index forecast for Wednesday, September 3rd in Grenville, SD is below.

Time UV Index Risk
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
Low
11am 2.8
Low
12pm 3.4
Moderate
1pm 4.6
Moderate
2pm 5.3
Moderate
3pm 3.2
Moderate
4pm 3.5
Moderate
5pm 2
Low
6pm 0.9
Low
7pm 0.2
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Thursday, September 4th in Grenville, SD 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 0.8
Low
10am 1.8
Low
11am 3.5
Moderate
12pm 5.2
Moderate
1pm 6.1
High
2pm 5.6
Moderate
3pm 4.8
Moderate
4pm 3.4
Moderate
5pm 0.4
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 Friday, September 5th in Grenville, SD 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 0.8
Low
10am 1.9
Low
11am 3.2
Moderate
12pm 2.6
Low
1pm 2.2
Low
2pm 2
Low
3pm 1.4
Low
4pm 1
Low
5pm 0.9
Low
6pm 0.5
Low
7pm 0.2
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Saturday, September 6th in Grenville, SD 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