UV Index for Alta, WY

Current Alta UV Index

4.8 (Moderate)

Last Updated 27 minutes ago

Hourly Alta UV Index

The hourly Alta, WY UV Index forecast for Saturday, September 13th, 2025.

5 Day Hourly Alta UV Index Forecast

Last Updated 28 minutes ago

The UV index forecast for the next five days in Alta, WY has no days reaching the extreme level and 2 days reaching the high or very high levels. The peak UV intensity in Alta over the next five days will be 6.4 on Sunday, September 14th at 1:00 pm.

The UV index forecast for Saturday, September 13th in Alta, WY is below.

Time UV Index Risk
1pm 5.8
Moderate
2pm 5.7
Moderate
3pm 4.7
Moderate
4pm 3.2
Moderate
5pm 1.8
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 Sunday, September 14th in Alta, WY 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 2.1
Low
11am 3.8
Moderate
12pm 5.4
Moderate
1pm 6.4
High
2pm 5.6
Moderate
3pm 2.7
Low
4pm 3.4
Moderate
5pm 1.3
Low
6pm 0.6
Low
7pm 0.2
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, September 15th in Alta, WY 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 1.3
Low
11am 1.6
Low
12pm 2.3
Low
1pm 2.6
Low
2pm 1.8
Low
3pm 1.9
Low
4pm 2.1
Low
5pm 1.4
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 16th in Alta, WY 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 0.6
Low
10am 1.4
Low
11am 3.5
Moderate
12pm 5.4
Moderate
1pm 6.4
High
2pm 6.3
High
3pm 5.3
Moderate
4pm 3.6
Moderate
5pm 1.9
Low
6pm 0.7
Low
7pm 0.1
Low
8pm 0
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, September 17th in Alta, WY 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