Montana 1990 USDA Hardiness Zone Map
View the new 2023 Montana Hardiness Zone Map
| Zone 2b -45°F to -40°F | Zone 3a -40°F to -35°F | Zone 3b -35°F to -30°F | Zone 4a -30°F to -25°F |
| Zone 4b -25°F to -20°F | Zone 5a -20°F to -15°F | Zone 5b -15°F to -10°F | Zone 6a -10°F to -5°F |
Based on the 1990 USDA Hardiness Zone Map, this interactive version covers the state of Montana which ranges from USDA Zone 2b to USDA Zone 6a.
1990 USDA Hardiness Zone Maps for Neighboring States and Provinces
Related Montana Maps:
List of 1990 Hardiness Zones for Cities in Montana
| Location | Hardiness Zone |
|---|---|
| Absarokee | Zone 4a: -30°F to -25°F |
| Acton | Zone 4b: -25°F to -20°F |
| Agency | Zone 4b: -25°F to -20°F |
| Alberton | Zone 5b: -15°F to -10°F |
| Alder | Zone 4a: -30°F to -25°F |
| Alzada | Zone 4a: -30°F to -25°F |
| Amsterdam | Zone 3b: -35°F to -30°F |
| Anaconda | Zone 3b: -35°F to -30°F |
| Angela | Zone 4a: -30°F to -25°F |
| Antelope | Zone 3b: -35°F to -30°F |
| Apgar | Zone 4a: -30°F to -25°F |
| Arlee | Zone 4a: -30°F to -25°F |
| Ashland | Zone 4a: -30°F to -25°F |
| Augusta | Zone 4a: -30°F to -25°F |
| Avon | Zone 4a: -30°F to -25°F |
| Azure | Zone 3b: -35°F to -30°F |
| Babb | Zone 3b: -35°F to -30°F |
| Bainville | Zone 3b: -35°F to -30°F |
| Baker | Zone 4a: -30°F to -25°F |
| Ballantine | Zone 4a: -30°F to -25°F |
| Bannack | Zone 4a: -30°F to -25°F |
| Basin | Zone 4a: -30°F to -25°F |
| Batavia | Zone 5b: -15°F to -10°F |
| Bear Dance | Zone 4a: -30°F to -25°F |
| Bearcreek | Zone 4b: -25°F to -20°F |
| Beaver Creek | Zone 3b: -35°F to -30°F |
| Belfry | Zone 4a: -30°F to -25°F |
| Belgrade | Zone 4a: -30°F to -25°F |
| Belknap | Zone 5b: -15°F to -10°F |
| Belt | Zone 4a: -30°F to -25°F |
| Benzien | Zone 3a: -40°F to -35°F |
| Biddle | Zone 3b: -35°F to -30°F |
| Big Arm | Zone 4b: -25°F to -20°F |
| Big Hole Natl Battlefield | Zone 3a: -40°F to -35°F |
| Big Sandy | Zone 3b: -35°F to -30°F |
| Big Sky | Zone 4a: -30°F to -25°F |
| Big Sky Ski And Summer Resort | Zone 4a: -30°F to -25°F |
| Big Timber | Zone 4b: -25°F to -20°F |
| Bigfork | Zone 4b: -25°F to -20°F |
| Bighorn | Zone 4a: -30°F to -25°F |
| Billings | Zone 4b: -25°F to -20°F |
| Birney | Zone 4a: -30°F to -25°F |
| Birney Day School | Zone 4a: -30°F to -25°F |
| Black Eagle | Zone 4a: -30°F to -25°F |
| Bloomfield | Zone 4a: -30°F to -25°F |
| Boneau | Zone 3b: -35°F to -30°F |
| Bonner | Zone 4a: -30°F to -25°F |
| Bonner-West Riverside | Zone 4a: -30°F to -25°F |
| Boulder | Zone 4b: -25°F to -20°F |
| Box Elder | Zone 3b: -35°F to -30°F |
| Boyd | Zone 4a: -30°F to -25°F |
| Boyes | Zone 3b: -35°F to -30°F |
| Bozeman | Zone 4b: -25°F to -20°F |
| Brady | Zone 3b: -35°F to -30°F |
| Bredette | Zone 4a: -30°F to -25°F |
| Bridger | Zone 4a: -30°F to -25°F |
| Bridger Bowl Ski Area | Zone 4b: -25°F to -20°F |
| Broadus | Zone 3b: -35°F to -30°F |
| Broadview | Zone 4a: -30°F to -25°F |
| Brockton | Zone 3a: -40°F to -35°F |
| Brockway | Zone 3b: -35°F to -30°F |
| Browning | Zone 3b: -35°F to -30°F |
| Brusett | Zone 3b: -35°F to -30°F |
| Buffalo | Zone 4a: -30°F to -25°F |
| Busby | Zone 3b: -35°F to -30°F |
| Butte | Zone 4a: -30°F to -25°F |
| Bynum | Zone 4a: -30°F to -25°F |
| Camas | Zone 5b: -15°F to -10°F |
| Cameron | Zone 3b: -35°F to -30°F |
| Camp Three | Zone 4a: -30°F to -25°F |
| Canyon Creek | Zone 4a: -30°F to -25°F |
| Capitol | Zone 3b: -35°F to -30°F |
| Carbert | Zone 3b: -35°F to -30°F |
| Cardwell | Zone 4b: -25°F to -20°F |
| Carlton | Zone 4b: -25°F to -20°F |
| Carter | Zone 3b: -35°F to -30°F |
| Cascade | Zone 3b: -35°F to -30°F |
| Charlo | Zone 4a: -30°F to -25°F |
| Charlos Heights | Zone 4b: -25°F to -20°F |
| Chester | Zone 3b: -35°F to -30°F |
| Chinook | Zone 3a: -40°F to -35°F |
| Choteau | Zone 4a: -30°F to -25°F |
| Christina | Zone 4a: -30°F to -25°F |
| Churchill | Zone 3b: -35°F to -30°F |
| Circle | Zone 3b: -35°F to -30°F |
| Clancy | Zone 4b: -25°F to -20°F |
| Clinton | Zone 4a: -30°F to -25°F |
| Clyde Park | Zone 4b: -25°F to -20°F |
| Coffee Creek | Zone 4a: -30°F to -25°F |
| Cohagen | Zone 3b: -35°F to -30°F |
| Colstrip | Zone 4a: -30°F to -25°F |
| Columbia Falls | Zone 4b: -25°F to -20°F |
| Columbus | Zone 4a: -30°F to -25°F |
| Condon | Zone 4a: -30°F to -25°F |
| Conner | Zone 4a: -30°F to -25°F |
| Conrad | Zone 3b: -35°F to -30°F |
| Content | Zone 3b: -35°F to -30°F |
| Cooke City | Zone 4a: -30°F to -25°F |
| Coram | Zone 4a: -30°F to -25°F |
| Corvallis | Zone 4b: -25°F to -20°F |
| Corwin Springs | Zone 4a: -30°F to -25°F |
| Craig | Zone 4a: -30°F to -25°F |
| Crane | Zone 3b: -35°F to -30°F |
| Crow Agency | Zone 4a: -30°F to -25°F |
| Culbertson | Zone 3b: -35°F to -30°F |
| Custer | Zone 4a: -30°F to -25°F |
| Cut Bank | Zone 3b: -35°F to -30°F |
| Dagmar | Zone 3b: -35°F to -30°F |
| Daleview | Zone 3a: -40°F to -35°F |
| Darby | Zone 4a: -30°F to -25°F |
| Dayton | Zone 4b: -25°F to -20°F |
| De Borgia | Zone 5b: -15°F to -10°F |
| Decker | Zone 4a: -30°F to -25°F |
| Deer Lodge | Zone 4a: -30°F to -25°F |
| Dell | Zone 4a: -30°F to -25°F |
| Denton | Zone 4a: -30°F to -25°F |
| Dillon | Zone 4b: -25°F to -20°F |
| Discovery Basin Ski Area | Zone 4a: -30°F to -25°F |
| Divide | Zone 4a: -30°F to -25°F |
| Dixon | Zone 5b: -15°F to -10°F |
| Dodson | Zone 3a: -40°F to -35°F |
| Dooley | Zone 3b: -35°F to -30°F |
| Drummond | Zone 4a: -30°F to -25°F |
| Dupuyer | Zone 4a: -30°F to -25°F |
| Dutton | Zone 3b: -35°F to -30°F |
| East Glacier Park | Zone 4a: -30°F to -25°F |
| East Glacier Park Village | Zone 4a: -30°F to -25°F |
| East Helena | Zone 4a: -30°F to -25°F |
| East Missoula | Zone 4a: -30°F to -25°F |
| Edgar | Zone 4a: -30°F to -25°F |
| Ekalaka | Zone 4a: -30°F to -25°F |
| Elkhorn | Zone 4b: -25°F to -20°F |
| Elliston | Zone 4a: -30°F to -25°F |
| Elmo | Zone 4b: -25°F to -20°F |
| Emigrant | Zone 4a: -30°F to -25°F |
| Ennis | Zone 4a: -30°F to -25°F |
| Essex | Zone 4a: -30°F to -25°F |
| Ethridge | Zone 4a: -30°F to -25°F |
| Eureka | Zone 4a: -30°F to -25°F |
| Evaro | Zone 4a: -30°F to -25°F |
| Evergreen | Zone 4b: -25°F to -20°F |
| Fairfield | Zone 3b: -35°F to -30°F |
| Fairview | Zone 3b: -35°F to -30°F |
| Fallon | Zone 3b: -35°F to -30°F |
| Finley Point | Zone 4a: -30°F to -25°F |
| Fishtail | Zone 4b: -25°F to -20°F |
| Flaxville | Zone 3a: -40°F to -35°F |
| Florence | Zone 4b: -25°F to -20°F |
| Floweree | Zone 3b: -35°F to -30°F |
| Forest Grove | Zone 4a: -30°F to -25°F |
| Forest Hill Village | Zone 4b: -25°F to -20°F |
| Forsyth | Zone 4a: -30°F to -25°F |
| Fort Belknap | Zone 3a: -40°F to -35°F |
| Fort Belknap Agency | Zone 3a: -40°F to -35°F |
| Fort Benton | Zone 3b: -35°F to -30°F |
| Fort Harrison | Zone 4a: -30°F to -25°F |
| Fort Peck | Zone 4a: -30°F to -25°F |
| Fort Shaw | Zone 3b: -35°F to -30°F |
| Fort Smith | Zone 4b: -25°F to -20°F |
| Fortine | Zone 4a: -30°F to -25°F |
| Four Buttes | Zone 3b: -35°F to -30°F |
| Four Corners | Zone 4b: -25°F to -20°F |
| Fox Lake | Zone 3b: -35°F to -30°F |
| Frazer | Zone 3b: -35°F to -30°F |
| Frenchtown | Zone 5b: -15°F to -10°F |
| Froid | Zone 3b: -35°F to -30°F |
| Fromberg | Zone 4a: -30°F to -25°F |
| Galata | Zone 3b: -35°F to -30°F |
| Gallatin Gateway | Zone 4b: -25°F to -20°F |
| Gardiner | Zone 4a: -30°F to -25°F |
| Garneill | Zone 4a: -30°F to -25°F |
| Garrison | Zone 4a: -30°F to -25°F |
| Garryowen | Zone 3b: -35°F to -30°F |
| Geraldine | Zone 4a: -30°F to -25°F |
| Geyser | Zone 4a: -30°F to -25°F |
| Gibson Flats | Zone 4a: -30°F to -25°F |
| Gildford | Zone 3b: -35°F to -30°F |
| Glacier Natl Park | Zone 4a: -30°F to -25°F |
| Glasgow | Zone 3b: -35°F to -30°F |
| Glen | Zone 4b: -25°F to -20°F |
| Glendive | Zone 3b: -35°F to -30°F |
| Glentana | Zone 3b: -35°F to -30°F |
| Gold Creek | Zone 4a: -30°F to -25°F |
| Grantsdale | Zone 4b: -25°F to -20°F |
| Grass Range | Zone 4a: -30°F to -25°F |
| Great Falls | Zone 4a: -30°F to -25°F |
| Great Falls/Malmstrom AFB | Zone 4a: -30°F to -25°F |
| Greenough | Zone 3a: -40°F to -35°F |
| Greycliff | Zone 4a: -30°F to -25°F |
| Hall | Zone 4a: -30°F to -25°F |
| Hamilton | Zone 4b: -25°F to -20°F |
| Hammond | Zone 3b: -35°F to -30°F |
| Happys Inn | Zone 4b: -25°F to -20°F |
| Hardin | Zone 4a: -30°F to -25°F |
| Harlem | Zone 3a: -40°F to -35°F |
| Harlowton | Zone 4a: -30°F to -25°F |
| Harrison | Zone 4b: -25°F to -20°F |
| Hathaway | Zone 4a: -30°F to -25°F |
| Haugan | Zone 5b: -15°F to -10°F |
| Havre | Zone 3b: -35°F to -30°F |
| Havre North | Zone 3b: -35°F to -30°F |
| Hays | Zone 3b: -35°F to -30°F |
| Heart Butte | Zone 4a: -30°F to -25°F |
| Hebgen Lake | Zone 3a: -40°F to -35°F |
| Helena | Zone 4a: -30°F to -25°F |
| Helena Valley Northeast | Zone 4a: -30°F to -25°F |
| Helena Valley Northwest | Zone 4a: -30°F to -25°F |
| Helena Valley Southeast | Zone 4a: -30°F to -25°F |
| Helena Valley West Central | Zone 4a: -30°F to -25°F |
| Helena West Side | Zone 4a: -30°F to -25°F |
| Helmville | Zone 4a: -30°F to -25°F |
| Heron | Zone 5b: -15°F to -10°F |
| Herron | Zone 3b: -35°F to -30°F |
| Highwood | Zone 4a: -30°F to -25°F |
| Hilger | Zone 4a: -30°F to -25°F |
| Hingham | Zone 3b: -35°F to -30°F |
| Hinsdale | Zone 4a: -30°F to -25°F |
| Hobson | Zone 4a: -30°F to -25°F |
| Hogeland | Zone 3b: -35°F to -30°F |
| Homestead | Zone 3b: -35°F to -30°F |
| Hot Springs | Zone 5b: -15°F to -10°F |
| Hot Springs Recreation Area | Zone 4a: -30°F to -25°F |
| Hungry Horse | Zone 4b: -25°F to -20°F |
| Huntley | Zone 4a: -30°F to -25°F |
| Huson | Zone 5b: -15°F to -10°F |
| Hysham | Zone 4a: -30°F to -25°F |
| Ingomar | Zone 4a: -30°F to -25°F |
| Inverness | Zone 3b: -35°F to -30°F |
| Ismay | Zone 3b: -35°F to -30°F |
| Jackson | Zone 4a: -30°F to -25°F |
| Jardine | Zone 4a: -30°F to -25°F |
| Jefferson City | Zone 4b: -25°F to -20°F |
| Jette | Zone 4b: -25°F to -20°F |
| Joliet | Zone 4a: -30°F to -25°F |
| Joplin | Zone 3b: -35°F to -30°F |
| Jordan | Zone 3b: -35°F to -30°F |
| Judith Gap | Zone 4a: -30°F to -25°F |
| Kalispell | Zone 4b: -25°F to -20°F |
| Kerr | Zone 4b: -25°F to -20°F |
| Kevin | Zone 3b: -35°F to -30°F |
| Kicking Horse | Zone 4a: -30°F to -25°F |
| Kila | Zone 5b: -15°F to -10°F |
| King Arthur Park | Zone 4b: -25°F to -20°F |
| Kings Point | Zone 4b: -25°F to -20°F |
| Kinsey | Zone 3b: -35°F to -30°F |
| Kirby | Zone 3b: -35°F to -30°F |
| Klein | Zone 4a: -30°F to -25°F |
| Knife River | Zone 3b: -35°F to -30°F |
| Kremlin | Zone 3b: -35°F to -30°F |
| Lake Mary Ronan | Zone 5b: -15°F to -10°F |
| Lake McDonald | Zone 4a: -30°F to -25°F |
| Lakeside | Zone 4b: -25°F to -20°F |
| Lakeview | Zone 3a: -40°F to -35°F |
| Lambert | Zone 3b: -35°F to -30°F |
| Lame Deer | Zone 3b: -35°F to -30°F |
| Landusky | Zone 3b: -35°F to -30°F |
| Larslan | Zone 3b: -35°F to -30°F |
| Laurel | Zone 4b: -25°F to -20°F |
| Lavina | Zone 4a: -30°F to -25°F |
| Ledger | Zone 3b: -35°F to -30°F |
| Lewistown | Zone 4a: -30°F to -25°F |
| Lewistown Heights | Zone 4a: -30°F to -25°F |
| Libby | Zone 5b: -15°F to -10°F |
| Lima | Zone 4a: -30°F to -25°F |
| Lincoln | Zone 3b: -35°F to -30°F |
| Lindisfarne | Zone 4b: -25°F to -20°F |
| Lindsay | Zone 3b: -35°F to -30°F |
| Livingston | Zone 4b: -25°F to -20°F |
| Lloyd | Zone 3b: -35°F to -30°F |
| Locate | Zone 3b: -35°F to -30°F |
| Lockwood | Zone 4a: -30°F to -25°F |
| Lodge Grass | Zone 3b: -35°F to -30°F |
| Lodge Pole | Zone 3a: -40°F to -35°F |
| Logan | Zone 3a: -40°F to -35°F |
| Lolo | Zone 4b: -25°F to -20°F |
| Lolo Hot Springs | Zone 5b: -15°F to -10°F |
| Loma | Zone 3a: -40°F to -35°F |
| Lonepine | Zone 5b: -15°F to -10°F |
| Loring | Zone 3b: -35°F to -30°F |
| Lothair | Zone 4a: -30°F to -25°F |
| Lustre | Zone 3b: -35°F to -30°F |
| Malmstrom AFB | Zone 4a: -30°F to -25°F |
| Malta | Zone 3b: -35°F to -30°F |
| Manhattan | Zone 3a: -40°F to -35°F |
| Marion | Zone 5b: -15°F to -10°F |
| Marsh | Zone 3b: -35°F to -30°F |
| Martin City | Zone 4a: -30°F to -25°F |
| Martinsdale | Zone 4b: -25°F to -20°F |
| Marysville | Zone 4a: -30°F to -25°F |
| Maudlow | Zone 4a: -30°F to -25°F |
| Maxville | Zone 4a: -30°F to -25°F |
| McAllister | Zone 4b: -25°F to -20°F |
| McCabe | Zone 3b: -35°F to -30°F |
| McLeod | Zone 4b: -25°F to -20°F |
| Medicine Lake | Zone 3b: -35°F to -30°F |
| Melrose | Zone 4b: -25°F to -20°F |
| Melstone | Zone 4a: -30°F to -25°F |
| Melville | Zone 4b: -25°F to -20°F |
| Mildred | Zone 3b: -35°F to -30°F |
| Miles City | Zone 3b: -35°F to -30°F |
| Milltown | Zone 4a: -30°F to -25°F |
| Missoula | Zone 4a: -30°F to -25°F |
| Mizpah | Zone 3b: -35°F to -30°F |
| Moccasin | Zone 4a: -30°F to -25°F |
| Molt | Zone 4b: -25°F to -20°F |
| Monarch | Zone 3b: -35°F to -30°F |
| Montana City | Zone 4a: -30°F to -25°F |
| Moore | Zone 4a: -30°F to -25°F |
| Mosby | Zone 4a: -30°F to -25°F |
| Muddy | Zone 3b: -35°F to -30°F |
| Musselshell | Zone 4a: -30°F to -25°F |
| Nashua | Zone 3b: -35°F to -30°F |
| Neihart | Zone 3b: -35°F to -30°F |
| Niarada | Zone 5b: -15°F to -10°F |
| Norris | Zone 4b: -25°F to -20°F |
| North Browning | Zone 3b: -35°F to -30°F |
| Northwest Peak Scenic Area | Zone 5b: -15°F to -10°F |
| Noxon | Zone 5b: -15°F to -10°F |
| Nye | Zone 4b: -25°F to -20°F |
| Oilmont | Zone 3b: -35°F to -30°F |
| Old Agency | Zone 5b: -15°F to -10°F |
| Olive | Zone 3b: -35°F to -30°F |
| Olney | Zone 4b: -25°F to -20°F |
| Opheim | Zone 3b: -35°F to -30°F |
| Orchard Homes | Zone 4b: -25°F to -20°F |
| Otter | Zone 4a: -30°F to -25°F |
| Outlook | Zone 3b: -35°F to -30°F |
| Ovando | Zone 3a: -40°F to -35°F |
| Pablo | Zone 4a: -30°F to -25°F |
| Paradise | Zone 5b: -15°F to -10°F |
| Park City | Zone 4a: -30°F to -25°F |
| Parker School | Zone 3b: -35°F to -30°F |
| Peerless | Zone 3b: -35°F to -30°F |
| Pendroy | Zone 3b: -35°F to -30°F |
| Perma | Zone 5b: -15°F to -10°F |
| Philipsburg | Zone 4a: -30°F to -25°F |
| Piltzville | Zone 4a: -30°F to -25°F |
| Pinesdale | Zone 5b: -15°F to -10°F |
| Pioneer Junction | Zone 5b: -15°F to -10°F |
| Plains | Zone 5b: -15°F to -10°F |
| Plentywood | Zone 3b: -35°F to -30°F |
| Plevna | Zone 3b: -35°F to -30°F |
| Polaris | Zone 4b: -25°F to -20°F |
| Polebridge | Zone 3b: -35°F to -30°F |
| Polson | Zone 4b: -25°F to -20°F |
| Pompeys Pillar | Zone 4a: -30°F to -25°F |
| Pony | Zone 4b: -25°F to -20°F |
| Poplar | Zone 3b: -35°F to -30°F |
| Powderville | Zone 3b: -35°F to -30°F |
| Power | Zone 3b: -35°F to -30°F |
| Pray | Zone 4b: -25°F to -20°F |
| Proctor | Zone 4b: -25°F to -20°F |
| Pryor | Zone 4b: -25°F to -20°F |
| Radersburg | Zone 4b: -25°F to -20°F |
| Ramsay | Zone 3a: -40°F to -35°F |
| Rapelje | Zone 4a: -30°F to -25°F |
| Ravalli | Zone 4b: -25°F to -20°F |
| Raymond | Zone 3b: -35°F to -30°F |
| Raynesford | Zone 4a: -30°F to -25°F |
| Red Lodge | Zone 4b: -25°F to -20°F |
| Redstone | Zone 3a: -40°F to -35°F |
| Reed Point | Zone 4a: -30°F to -25°F |
| Reserve | Zone 3b: -35°F to -30°F |
| Rexford | Zone 4a: -30°F to -25°F |
| Richey | Zone 4a: -30°F to -25°F |
| Richland | Zone 3b: -35°F to -30°F |
| Ridgeway | Zone 3b: -35°F to -30°F |
| Ringling | Zone 4a: -30°F to -25°F |
| Riverbend | Zone 5b: -15°F to -10°F |
| Rivulet | Zone 5b: -15°F to -10°F |
| Roberts | Zone 4b: -25°F to -20°F |
| Rocky Boy's Agency | Zone 3b: -35°F to -30°F |
| Rocky Point | Zone 4b: -25°F to -20°F |
| Rollins | Zone 4b: -25°F to -20°F |
| Ronan | Zone 4a: -30°F to -25°F |
| Roscoe | Zone 4b: -25°F to -20°F |
| Rosebud | Zone 4a: -30°F to -25°F |
| Ross Creek Scenic Area | Zone 5b: -15°F to -10°F |
| Roundup | Zone 4a: -30°F to -25°F |
| Roy | Zone 4a: -30°F to -25°F |
| Rudyard | Zone 3b: -35°F to -30°F |
| Ryegate | Zone 4a: -30°F to -25°F |
| Saco | Zone 3b: -35°F to -30°F |
| Saddle Butte | Zone 3b: -35°F to -30°F |
| Saint Ignatius | Zone 4a: -30°F to -25°F |
| Saint Marie | Zone 3b: -35°F to -30°F |
| Saint Pierre | Zone 3b: -35°F to -30°F |
| Saint Regis | Zone 5b: -15°F to -10°F |
| Saint Xavier | Zone 4a: -30°F to -25°F |
| Saltese | Zone 5b: -15°F to -10°F |
| Sand Coulee | Zone 4a: -30°F to -25°F |
| Sand Springs | Zone 3a: -40°F to -35°F |
| Sanders | Zone 4a: -30°F to -25°F |
| Sangrey | Zone 3b: -35°F to -30°F |
| Santa Rita | Zone 3b: -35°F to -30°F |
| Savage | Zone 3b: -35°F to -30°F |
| Scobey | Zone 3b: -35°F to -30°F |
| Sedan | Zone 4a: -30°F to -25°F |
| Seeley Lake | Zone 3b: -35°F to -30°F |
| Shambo | Zone 3b: -35°F to -30°F |
| Shawmut | Zone 4a: -30°F to -25°F |
| Shelby | Zone 3b: -35°F to -30°F |
| Shepherd | Zone 4a: -30°F to -25°F |
| Sheridan | Zone 4b: -25°F to -20°F |
| Shonkin | Zone 4a: -30°F to -25°F |
| Sidney | Zone 3b: -35°F to -30°F |
| Silesia | Zone 4a: -30°F to -25°F |
| Silver Gate | Zone 4a: -30°F to -25°F |
| Silver Star | Zone 4b: -25°F to -20°F |
| Simms | Zone 3b: -35°F to -30°F |
| Snawmut | Zone 4a: -30°F to -25°F |
| Somers | Zone 4b: -25°F to -20°F |
| Sonnette | Zone 3b: -35°F to -30°F |
| South Browning | Zone 3b: -35°F to -30°F |
| Springdale | Zone 4b: -25°F to -20°F |
| Springhill | Zone 4a: -30°F to -25°F |
| Stanford | Zone 4a: -30°F to -25°F |
| Starr School | Zone 3b: -35°F to -30°F |
| Stevensville | Zone 4b: -25°F to -20°F |
| Stockett | Zone 4a: -30°F to -25°F |
| Stryker | Zone 4a: -30°F to -25°F |
| Sula | Zone 4a: -30°F to -25°F |
| Sumatra | Zone 4a: -30°F to -25°F |
| Sun Prairie | Zone 4a: -30°F to -25°F |
| Sun River | Zone 3b: -35°F to -30°F |
| Sunburst | Zone 3b: -35°F to -30°F |
| Superior | Zone 5b: -15°F to -10°F |
| Swan Lake | Zone 4a: -30°F to -25°F |
| Sweet Grass | Zone 3b: -35°F to -30°F |
| Sylvanite | Zone 5b: -15°F to -10°F |
| Teigen | Zone 4a: -30°F to -25°F |
| Terry | Zone 3a: -40°F to -35°F |
| Thompson Falls | Zone 5b: -15°F to -10°F |
| Three Forks | Zone 3b: -35°F to -30°F |
| Toston | Zone 4a: -30°F to -25°F |
| Townsend | Zone 4a: -30°F to -25°F |
| Trego | Zone 4a: -30°F to -25°F |
| Trout Creek | Zone 5b: -15°F to -10°F |
| Troy | Zone 5b: -15°F to -10°F |
| Turah | Zone 4a: -30°F to -25°F |
| Turner | Zone 3b: -35°F to -30°F |
| Turtle Lake | Zone 4a: -30°F to -25°F |
| Twin Bridges | Zone 4b: -25°F to -20°F |
| Two Dot | Zone 4b: -25°F to -20°F |
| Twodot | Zone 4b: -25°F to -20°F |
| Ulm | Zone 3b: -35°F to -30°F |
| Valier | Zone 3b: -35°F to -30°F |
| Van Norman | Zone 3b: -35°F to -30°F |
| Vananda | Zone 4a: -30°F to -25°F |
| Vandalia | Zone 3b: -35°F to -30°F |
| Vaughn | Zone 3b: -35°F to -30°F |
| Victor | Zone 4b: -25°F to -20°F |
| Vida | Zone 3b: -35°F to -30°F |
| Virgelle | Zone 3b: -35°F to -30°F |
| Virginia City | Zone 4a: -30°F to -25°F |
| Volborg | Zone 3b: -35°F to -30°F |
| Walkerville | Zone 3b: -35°F to -30°F |
| Warm Springs | Zone 3b: -35°F to -30°F |
| Warrick | Zone 3b: -35°F to -30°F |
| Weeksville | Zone 5b: -15°F to -10°F |
| West Glacier | Zone 4a: -30°F to -25°F |
| West Glendive | Zone 3b: -35°F to -30°F |
| West Havre | Zone 3b: -35°F to -30°F |
| West Yellowstone | Zone 2b: -45°F to -40°F |
| Westby | Zone 3b: -35°F to -30°F |
| White Haven | Zone 5b: -15°F to -10°F |
| White Sulphur Springs | Zone 4a: -30°F to -25°F |
| Whitefish | Zone 5b: -15°F to -10°F |
| Whitefish Mountain Resort | Zone 4b: -25°F to -20°F |
| Whitehall | Zone 4b: -25°F to -20°F |
| Whitetail | Zone 3a: -40°F to -35°F |
| Whitewater | Zone 3b: -35°F to -30°F |
| Whitlash | Zone 3b: -35°F to -30°F |
| Wibaux | Zone 3b: -35°F to -30°F |
| Wilborn | Zone 4a: -30°F to -25°F |
| Willard | Zone 4a: -30°F to -25°F |
| Willow Creek | Zone 3b: -35°F to -30°F |
| Wilsall | Zone 4a: -30°F to -25°F |
| Winifred | Zone 3b: -35°F to -30°F |
| Winnett | Zone 4a: -30°F to -25°F |
| Winston | Zone 4a: -30°F to -25°F |
| Wisdom | Zone 3a: -40°F to -35°F |
| Wise River | Zone 4a: -30°F to -25°F |
| Wolf Creek | Zone 4a: -30°F to -25°F |
| Wolf Point | Zone 3a: -40°F to -35°F |
| Woods Bay | Zone 4b: -25°F to -20°F |
| Worden | Zone 4a: -30°F to -25°F |
| Wye | Zone 4b: -25°F to -20°F |
| Wyola | Zone 3b: -35°F to -30°F |
| Yaak | Zone 4b: -25°F to -20°F |
| Yakt | Zone 4b: -25°F to -20°F |
| Yellowtail | Zone 4b: -25°F to -20°F |
| Zortman | Zone 3b: -35°F to -30°F |
| Zurich | Zone 3a: -40°F to -35°F |