UV Index for Boulder, UT

Current Boulder UV Index

4.8 (Moderate)

Last Updated 21 minutes ago

Hourly Boulder UV Index

The hourly Boulder, UT UV Index forecast for Saturday, July 5th, 2025.

5 Day Hourly Boulder UV Index Forecast

Last Updated 5 hours ago

The UV index forecast for the next five days in Boulder, UT has 4 days reaching the extreme level and no days reaching the high or very high levels. The peak UV intensity in Boulder over the next five days will be 12.8 on Tuesday, July 8th at 1:00 pm.

The UV index forecast for Saturday, July 5th in Boulder, UT is below.

Time UV Index Risk
6pm 2.4
Low
7pm 0.9
Low
8pm 0.2
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Sunday, July 6th in Boulder, UT 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 0.2
Low
8am 1
Low
9am 2.7
Low
10am 5.2
Moderate
11am 8.1
Very High
12pm 10.6
Very High
1pm 12.1
Extreme
2pm 12
Extreme
3pm 10.4
Very High
4pm 7.7
High
5pm 4.8
Moderate
6pm 2.4
Low
7pm 0.8
Low
8pm 0.2
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Monday, July 7th in Boulder, UT 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 0.2
Low
8am 1
Low
9am 2.6
Low
10am 5
Moderate
11am 7.8
High
12pm 10.5
Very High
1pm 12.1
Extreme
2pm 12
Extreme
3pm 10.5
Very High
4pm 7.9
High
5pm 5
Moderate
6pm 2.5
Low
7pm 0.9
Low
8pm 0.2
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Tuesday, July 8th in Boulder, UT 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 0.2
Low
8am 1
Low
9am 2.8
Low
10am 5.5
Moderate
11am 8.6
Very High
12pm 11.3
Extreme
1pm 12.8
Extreme
2pm 12.7
Extreme
3pm 11
Extreme
4pm 8.2
Very High
5pm 5.1
Moderate
6pm 2.5
Low
7pm 0.9
Low
8pm 0.2
Low
9pm 0
Low
10pm 0
Low
11pm 0
Low

The UV index forecast for Wednesday, July 9th in Boulder, UT 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