UV Index for Dewey, MT

Current Dewey UV Index

0 (Low)

Last Updated 26 minutes ago

Hourly Dewey UV Index

The hourly Dewey, MT UV Index forecast for Thursday, September 18th, 2025.

5 Day Hourly Dewey UV Index Forecast

Last Updated 16 hours ago

The UV index forecast for the next five days in Dewey, MT has no days reaching the extreme level and 2 days reaching the high or very high levels. The peak UV intensity in Dewey over the next five days will be 6.9 on Thursday, September 18th at 1:00 pm.

The UV index forecast for Thursday, September 18th in Dewey, MT is below.

Time UV Index Risk
5am 0
Low
6am 0
Low
7am 0
Low
8am 0.2
Low
9am 0.8
Low
10am 2.1
Low
11am 3.9
Moderate
12pm 5.7
Moderate
1pm 6.9
High
2pm 6.9
High
3pm 5.8
Moderate
4pm 4
Moderate
5pm 2.2
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 Friday, September 19th in Dewey, MT 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 0.1
Low
9am 0.6
Low
10am 1.6
Low
11am 3.4
Moderate
12pm 4.7
Moderate
1pm 5.4
Moderate
2pm 4.8
Moderate
3pm 3.7
Moderate
4pm 3.3
Moderate
5pm 1.6
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 Saturday, September 20th in Dewey, MT 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 0.6
Low
10am 1.8
Low
11am 3.5
Moderate
12pm 5.1
Moderate
1pm 6.2
High
2pm 6.2
High
3pm 5.2
Moderate
4pm 3.6
Moderate
5pm 2
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 Sunday, September 21st in Dewey, MT 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