Frost Dates in Montana

Adel June 4 – September 12 Alberton May 18 – September 25 Albion 1 N June 2 – September 6 Alder 17 S June 6 – September 14 Alder 19s Always frozen Anaconda June 1 – September 14 Augusta May 19 – September 21 Austin 1 W June 4 – September 14 Baker May 12 – September 26 Baker Muni AP May 16 – September 26 Biddle 8 Sw May 14 – September 28 Big Sandy May 17 – September 25 Big Sky 2wnw Always frozen Big Timber May 14 – September 26 Bigfork 13 S May 1 – October 15 Billings Logan Intl AP May 4 – October 7 Billings Wfo May 5 – October 3 Billings Wtp May 10 – October 1 Blackleaf June 9 – September 3 Boulder June 7 – September 8 Bozeman 6 W Exp Farm May 23 – September 23 Bozeman Gallatin Fld May 26 – September 16 Bozeman Montana State Univ May 26 – September 22 Brady 27 Ene (The Knees) May 13 – September 29 Brandenberg May 18 – September 22 Bredette May 20 – September 21 Bridger 2 N May 14 – September 24 Broadus May 16 – September 28 Brockway 3 Wsw May 20 – September 19 Busby May 23 – September 15 Butte Bert Mooney AP June 13 – September 5 Bynum 4 Sse May 16 – September 27 Carlyle 13 Nw May 18 – September 29 Carter 14 W May 23 – September 23 Cascade 20 Sse Always frozen Cascade 5 S May 21 – September 19 Chester May 24 – September 17 Chinook May 14 – September 23 Chinook 35se May 23 – September 23 Choteau May 28 – September 12 Choteau 8ne May 20 – September 22 Circle May 17 – September 22 Cohagen May 25 – September 14 Colstrip May 15 – September 30 Columbus May 27 – September 14 Conrad May 20 – September 19 Content 4 Nne May 25 – September 14 Cooke City 2 W Always frozen Creston May 12 – September 25 Culbertson May 21 – September 20 Cut Bank Muni AP May 24 – September 15 Darby May 24 – September 23 Deer Lodge 3 W Always frozen Del Bonita May 28 – September 16 Denton June 1 – September 11 Dillon 18 Wsw Always frozen Dillon AP June 2 – September 13 Dillon U Of Montana Western June 5 – September 13 Divide June 10 – September 7 Drummond Aviation Always frozen Dunkirk 19nne May 23 – September 14 E Glacier June 8 – September 5 Ekalaka May 20 – September 23 Elliston June 9 – September 8 Ennis June 16 – September 4 Eureka Rs May 11 – September 27 Fairfield May 13 – September 27 Flatwillow 4 Ene May 16 – September 28 Forsyth May 9 – September 29 Fortine 1 N May 16 – September 18 Ft Assiniboine May 15 – September 24 Ft Belknap 2 Sw May 16 – September 22 Ft Benton May 15 – September 22 Ft Peck Pwr Plt May 8 – October 1 Gardiner May 21 – September 27 Geraldine May 14 – September 26 Gibson 2 Ne May 27 – September 18 Gibson Dam June 12 – September 8 Gildford May 24 – September 15 Glasgow #2 May 3 – October 1 Glasgow Intl AP May 6 – September 30 Glen 4 NAlways frozen Glendive May 3 – October 4 Goldbutte 7 N Always frozen Grass Range May 20 – September 24 Great Falls 16st May 6 – October 1 Great Falls Intl AP May 19 – September 24 Great Falls Wfo May 12 – September 28 Hamilton May 21 – September 22 Hardin May 13 – September 29 Harlem May 16 – September 21 Harlem 20s May 24 – September 22 Harlowton May 23 – September 16 Harlowton 11nw May 30 – September 20 Haugan 1 W Always frozen Havre City Co AP May 15 – September 23 Hebgen Dam June 15 – September 10 Helena Rgnl AP May 9 – September 30 Heron 2 Nw May 20 – September 20 Highwood 7 Ne May 7 – October 2 Hinsdale 4 Sw May 15 – September 26 Holter Dam May 19 – September 24 Hungry Horse Dam May 9 – October 1 Huntley Exp Stn May 12 – September 25 Hysham May 10 – September 29 Hysham 25 Sse May 26 – September 16 Ingomar 9 E May 21 – September 19 JacksonAlways frozen Joliet May 29 – September 15 Joplin May 21 – September 19 Jordan May 21 – September 18 Jordan AP May 18 – September 20 Judith Gap June 1 – September 15 Judith Gap 13 E June 3 – September 15 Kalispell Glacier AP May 31 – September 10 LakeviewAlways frozen Laurin 2ne May 24 – September 22 Lennep 5 Sw Always frozen Lewistown May 14 – September 28 Lewistown 11 Sse May 31 – September 14 Lewistown 11ese May 19 – September 25 Lewistown 42 Wsw June 15 – September 4 Lewistown Muni AP May 23 – September 21 Libby May 10 – September 26 Libby 1 Ne Rs May 23 – September 21 Libby 32 Sse Always frozen Libby Dam (Base) May 11 – October 1 Lima June 11 – September 10 Lincoln Rs Always frozen Lindbergh Lake May 20 – September 22 Livingston 12 S May 19 – September 25 Livingston Mission Fld May 27 – September 14 Logan Landfill May 26 – September 15 Loma May 20 – September 19 Malta May 10 – September 29 Malta 35 S May 16 – September 23 Malta 7 E May 7 – September 28 Martinsdale 3 Nnw June 3 – September 8 Medicine Lake 3 Se May 16 – September 18 Melstone May 10 – September 29 Melville 4 W June 9 – September 7 Mildred 5 N May 20 – September 22 Miles City F Wiley Fld May 8 – September 30 Millegan 14 Se June 11 – September 6 Missoula 2 Ne May 10 – October 1 Missoula 6 Nw Wfo May 6 – October 4 Missoula Intl AP May 16 – September 26 Mizpah 4 Nnw May 22 – September 15 Moccasin Exp Stn May 28 – September 20 Moorhead 9 Ne May 17 – September 22 Mosby 4 Ene May 5 – October 4 Mystic Lake June 5 – September 14 Nashua #2 May 12 – September 24 Neihart 8 Nnw June 6 – September 12 Norris Madison Pwr House April 30 – October 10 Nye #2 June 1 – September 11 OlneyAlways frozen Opheim 10 N June 1 – September 7 Opheim 12 Sse June 5 – September 2 Ovando 9 Sse Always frozen Phillipsburg Rs Always frozen Plentywood May 25 – September 14 Plevna May 21 – September 20 Polebridge Always frozen Polson May 10 – October 5 Pompeys Pillar 15n May 22 – September 22 Port Of Morgan May 19 – September 22 PotomacAlways frozen Powderville 8 Nne May 13 – September 25 Rapelje May 24 – September 21 Raymond Border Stn May 19 – September 23 Raynesford 2 Nnw May 22 – September 23 Red Lodge June 3 – September 19 Redstone May 28 – September 7 Ridgeway 1 S May 17 – September 22 Rock Springs May 15 – September 25 Rogers Pass 9 Nne May 21 – September 15 Roundup May 20 – September 21 Roundup 15 Sw May 22 – September 15 Roy 8 Ne May 14 – September 24 Rudyard 19s May 23 – September 19 Rudyard 21 N May 30 – September 11 Ryegate May 17 – September 23 Ryegate 18 Nnw May 26 – September 18 Saco 1 Nnw May 15 – September 23 Saint Ignatius May 12 – October 2 Saint Regis 1 Ne Always frozen Sand Creek May 12 – September 27 Savage May 12 – September 25 Scobey 4 Nw May 28 – September 6 Seeley Lake Rs Always frozen Shelby May 23 – September 16 Shonkin 7 S May 24 – September 21 Sidney May 11 – September 27 Silver Gate Always frozen Simpson 6 N - Wildhorse May 26 – September 15 Skq Dam May 15 – September 28 Sonnette 7 Sw May 25 – September 19 St Marie May 13 – September 27 St Mary June 12 – September 5 St. Mary 1 Ssw June 3 – September 8 Stanford May 25 – September 21 Stevensville May 22 – September 19 Sula 14 Ne Always frozen Sula 3 Ene Always frozen Sun Rvr 4 S June 2 – September 10 Sunburst 8 E May 17 – September 25 Superior May 17 – September 23 Swan Lake May 17 – September 19 Sweetgrass May 15 – September 25 Terry May 12 – September 28 Terry 21 Nnw May 26 – September 17 Thompson Falls Ph May 7 – October 4 Tiber Dam May 16 – September 23 Tizer Gardens June 18 – September 5 Townsend 3se May 19 – September 19 Trident May 9 – September 27 Trout Creek Rs May 20 – September 21 Troy May 14 – September 25 Turner 11n May 19 – September 21 Twin Bridges June 8 – September 2 Valentine May 18 – September 21 Valier May 17 – September 24 Vida 6 Ne May 16 – September 22 Virginia City June 4 – September 18 W Glacier May 18 – September 20 W Yellowstone Gateway Always frozen Westby May 18 – September 21 Western Ag Rsch Ctr May 23 – September 21 White Sulphur Springs #2 June 4 – September 11 Whitefish May 16 – September 25 Wibaux 2 E May 27 – September 16 Wilsall 1s June 4 – September 6 Wilsall 8 Ene June 8 – September 7 Winifred May 16 – September 23 WisdomAlways frozen Wise Rvr 3 Wnw Always frozen Wolf Point 29 Ene May 24 – September 14 Wolf Point 34 Ne May 13 – September 28 Wolf Point Intl AP May 16 – September 20 Wolf Pt May 8 – September 28 Wyola 1 Sw May 21 – September 17 Yaak 9nne Always frozen Yellowtail Dam May 7 – October 5 Zortman May 18 – September 23