Frost Dates in Montana

AbsarokeePop. 1K BelgradePop. 8K Big SkyPop. 2K BigforkPop. 4K BillingsPop. 117K Bonner-West Riverside Pop. 2K BozemanPop. 43K BrowningPop. 1K ButtePop. 34K ClancyPop. 2K ClintonPop. 1K Columbia FallsPop. 5K Crow AgencyPop. 2K Cut BankPop. 3K Deer LodgePop. 3K DillonPop. 4K East HelenaPop. 2K East MissoulaPop. 2K EurekaPop. 1K EvergreenPop. 8K Fort Belknap Agency Pop. 1K Fort BentonPop. 1K Four CornersPop. 3K FrenchtownPop. 2K GlasgowPop. 3K Great FallsPop. 60K HavrePop. 10K HelenaPop. 32K Helena Valley Northeast Pop. 3K Helena Valley Northwest Pop. 3K Helena Valley Southeast Pop. 8K Helena Valley West Central Pop. 8K Helena West Side Pop. 2K KalispellPop. 22K LakesidePop. 3K Lame DeerPop. 2K LaurelPop. 7K LincolnPop. 1K LivingstonPop. 7K LockwoodPop. 7K LoloPop. 4K Malmstrom Air Force Base Pop. 3K ManhattanPop. 2K Miles CityPop. 9K MissoulaPop. 71K Montana CityPop. 3K North BrowningPop. 2K Orchard HomesPop. 5K PabloPop. 2K PlainsPop. 1K RonanPop. 2K ScobeyPop. 1K Seeley LakePop. 2K SomersPop. 1K South BrowningPop. 2K Sun PrairiePop. 2K Thompson FallsPop. 1K Three ForksPop. 2K TownsendPop. 2K Warm SpringsPop. 3K West GlendivePop. 2K West Yellowstone Pop. 1K WhitehallPop. 1K Wolf PointPop. 3K

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