UV Index for Alto, SD

Current Alto UV Index

0.2 (Low)

Last Updated 8 minutes ago

Hourly Alto UV Index

The hourly Alto, SD UV Index forecast for Saturday, August 30th, 2025.

5 Day Hourly Alto UV Index Forecast

Last Updated 20 hours ago

The UV index forecast for the next five days in Alto, SD has no days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Alto over the next five days will be 3.6 on Sunday, August 31st at 1:00 pm.

The UV index forecast for Saturday, August 30th in Alto, SD is below.

Time UV Index Risk
10am 0.3
Low
11am 0.5
Low
12pm 0.7
Low
1pm 1
Low
2pm 1.6
Low
3pm 1.4
Low
4pm 1.9
Low
5pm 1.9
Low
6pm 0.8
Low
7pm 0.2
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Sunday, August 31st in Alto, 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 0.3
Low
9am 1
Low
10am 2.2
Low
11am 2.5
Low
12pm 2.8
Low
1pm 3.6
Moderate
2pm 1.6
Low
3pm 1.9
Low
4pm 1.4
Low
5pm 1
Low
6pm 0.7
Low
7pm 0.2
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, September 1st in Alto, 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
Low
9am 0.2
Low
10am 0.4
Low
11am 0.9
Low
12pm 1.1
Low
1pm 0.9
Low
2pm 1
Low
3pm 1.2
Low
4pm 1.8
Low
5pm 1.2
Low
6pm 0.6
Low
7pm 0.1
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, September 2nd in Alto, 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