UV Index Today in Montana (MT) Friday, May 22, 2026 -12:37 PMMDT (GMT-6) The average maximum UV Index today across 152 locations in Montana (MT) , is 6.6. The highest projected maximum is 7.6 in Darby at 1:00 PM MDT, while the lowest projected maximum is 4.7 in Sidney at 12:00 PM MDT.
Tomorrow, the average maximum UV Index across those same locations is expected to be 7.5. The highest projected maximum is 8.6 in Big Sky at 1:00 PM MDT, and the lowest projected maximum is 6.6 in Glasgow at 1:00 PM MDT.
55 Counties in Montana (MT) Average Maximum UV Index Today
Beaverhead County - 6.8
Big Horn County - 7.3
Blaine County - 6.7
Broadwater County - 6.4
Carbon County - 6.8
Carter County - 7
Cascade County - 6.8
Chouteau County - 6.6
Custer County - 6.9
Daniels County - 6.2
Dawson County - 6.1
Deer Lodge County - 6.6
Fallon County - 6
Fergus County - 7.1
Flathead County - 6.5
Gallatin County - 6.4
Garfield County - 6.9
Glacier County - 6
Golden Valley County - 6.9
Granite County - 6.4
Hill County - 6.6
Jefferson County - 6.1
Judith Basin County - 7.2
Lake County - 7
Lewis and Clark County - 6.5
Liberty County - 6.5
Lincoln County - 5.7
McCone County - 6.5
Madison County - 6.5
Meagher County - 7
Mineral County - 6.9
Missoula County - 7.2
Musselshell County - 7
Park County - 6.6
Phillips County - 6.8
Pondera County - 6.4
Powder River County - 7.2
Powell County - 6.5
Prairie County - 6.6
Ravalli County - 7
Richland County - 4.7
Roosevelt County - 6.1
Rosebud County - 7.3
Sanders County - 6.7
Sheridan County - 5.5
Silver Bow County - 6.8
Stillwater County - 6.7
Sweet Grass County - 6.9
Teton County - 6
Toole County - 6.6
Treasure County - 7.1
Valley County - 6.6
Wheatland County - 7.1
Wibaux County - 5
Yellowstone County - 7.2152 Places in Montana (MT) Maximum UV Index Today
Absarokee - 6.7
Alberton - 7.1
Arlee - 7.2
Ashland - 7.3
Baker - 6
Batavia - 6
Belgrade - 6.3
Belt - 6.8
Bigfork - 6.8
Big Sandy - 6.6
Big Sky - 6.4
Big Timber - 6.9
Billings - 7.3
Black Eagle - 6.9
Bonner-West Riverside - 7.3
Boulder - 5.7
Bozeman - 6.7
Bridger - 6.7
Browning - 5.8
Busby - 7.3
Carlton - 7.2
Cascade - 6.6
Chester - 6.5
Chinook - 6.6
Choteau - 5.8
Churchill - 6.3
Circle - 6.5
Clancy - 6.2
Clinton - 7.3
Colstrip - 7.2
Columbia Falls - 6.8
Columbus - 6.6
Conrad - 6.7
Corvallis - 7.1
Crow Agency - 7.3
Culbertson - 5.7
Cut Bank - 6.6
Darby - 7.6
Deer Lodge - 6.6
Dillon - 6.8
East Helena - 6.2
East Missoula - 7.3
Ennis - 6.1
Eureka - 6.9
Evergreen - 6.8
Fairfield - 6.3
Fairview - 4.7
Florence - 7.2
Forsyth - 7.1
Fort Belknap Agency - 6.7
Fort Benton - 6.7
Four Corners - 6.3
Frenchtown - 7.2
Gallatin Gateway - 6.4
Gardiner - 6.6
Glasgow - 6.6
Glendive - 6.1
Great Falls - 6.9
Hamilton - 6.9
Hardin - 7.3
Harlem - 6.7
Harlowton - 7.1
Havre - 6.6
Havre North - 6.6
Hays - 6.9
Heart Butte - 5.9
Helena - 6.2
Helena Flats - 6.8
Helena Valley Northeast - 7.1
Helena Valley Northwest - 7.1
Helena Valley Southeast - 6.2
Helena Valley West Central - 7.1
Helena West Side - 6.2
Hot Springs - 7.1
Hungry Horse - 6.7
Jefferson City - 6.2
Joliet - 6.7
Kalispell - 6.8
King Arthur Park - 6.3
Lakeside - 6.2
Lame Deer - 7.3
Laurel - 7
Lewistown - 7.1
Libby - 5.4
Lincoln - 7.3
Lindisfarne - 7
Livingston - 6.6
Lockwood - 7.3
Lolo - 7.2
Malmstrom AFB - 6.9
Malta - 6.7
Manhattan - 6.3
Marion - 6
Miles City - 6.9
Missoula - 7.3
Montana City - 6.2
Muddy - 7.4
North Browning - 5.8
Orchard Homes - 7.2
Pablo - 7.2
Park City - 6.7
Philipsburg - 6.4
Pinesdale - 6.9
Pioneer Junction - 5.6
Plains - 6.8
Plentywood - 5.5
Polson - 7
Ponderosa Pines - 6.4
Poplar - 6.2
Pray - 6.5
Red Lodge - 6.9
Riverbend - 7.2
Rocky Boy West - 6.6
Ronan - 7.2
Roundup - 7
St. Ignatius - 7.2
Scobey - 6.2
Seeley Lake - 6.4
Shelby - 6.6
Sheridan - 7.1
Sidney - 4.7
Somers - 6.2
South Browning - 5.8
South Hills - 6.2
Spokane Creek - 6
Stevensville - 7
Sun Prairie - 6.9
Superior - 6.5
Terry - 6.6
The Silos - 7.2
Thompson Falls - 6.1
Three Forks - 6.3
Townsend - 6.3
Trego - 6
Troy - 4.9
Turah - 7.3
Ulm - 6.9
Valier - 6.7
Vaughn - 6.9
Victor - 6.4
Walkerville - 6.8
West Glendive - 6.1
West Yellowstone - 6.6
Wheatland - 6.3
Whitefish - 6.1
Whitehall - 6.1
White Haven - 5.6
White Sulphur Springs - 7
Wibaux - 5
Wolf Point - 6.4
Woods Bay - 6.8
Wye - 7.2