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Montana Planting Zones

Montana covers USDA hardiness zones 3b to 6b on the 2023 map. The most common zone is 4b (32% of ZIP codes), where the coldest winter night averages -25 to -20 °F. Billings is zone 5a, Missoula is zone 5b–6a and Helena is zone 4b–5a.

Zones in Montana

Share of the state’s ZIP codes in each zone.

3b 6% -35 to -30 °F
4a 18% -30 to -25 °F
4b 32% -25 to -20 °F
5a 28% -20 to -15 °F
5b 8% -15 to -10 °F
6a 8% -10 to -5 °F
6b <1% -5 to 0 °F

Major cities

Billings 5a
Missoula 5b–6a
Helena 4b–5a
Bozeman 5a
Butte 4a–5a
Great Falls 4b
Kalispell 5b
Ashland 4b
Roundup 4b
Absarokee 5a
Acton 5a
Alberton 5b

Every city and town in Montana

Absarokee 59001 5a
Acton 59002 5a
Alberton 59820 5b
Alder 59710 5a
Alzada 59311 4b
Anaconda 59711 5a
Angela 59312 4a
Antelope 59211 3b
Arlee 59821 5b
Ashland 59003+ 4b
Augusta 59410 4b
Avon 59713 4b
Babb 59411 4b
Bainville 59212 4a
Baker 59313 4b
Ballantine 59006 4b
Basin 59631 5a
Bearcreek 59007 5a
Belfry 59008 5a
Belgrade 59714 5a
Belt 59412 4b
Biddle 59314 4b
Big Arm 59910 6a
Big Sandy 59520 4a
Big Sky 59716 4b
Big Timber 59011 5a
Bigfork 59911 5b
Bighorn 59010 4b
Billings 59101+ 5a
Birney 59012 4b
Black Eagle 59414 4b
Bloomfield 59315 4a
Bonner 59823 5b
Boulder 59632 5a
Box Elder 59521 4a
Boyd 59013 5a
Boyes 59316 4b
Bozeman 59715+ 5a
Brady 59416 4a
Bridger 59014 5a
Broadus 59317 4b
Broadview 59015 4b
Brockton 59213 4a
Brockway 59214 4a
Browning 59417 4a
Brusett 59318 4b
Buffalo 59418 4b
Busby 59016 5a
Butte 59701+ 4a–5a
Bynum 59419 4b
Cameron 59720 5a
Canyon Creek 59633 4b
Capitol 59319 4b
Cardwell 59721 5a
Carter 59420 4a
Cascade 59421 4b
Charlo 59824 6a
Chester 59522 4a
Chinook 59523 3b
Choteau 59422 4b
Circle 59215 4a
Clancy 59634 4b
Clinton 59825 5b
Clyde Park 59018 5a
Coffee Creek 59424 4b
Cohagen 59322 4a
Colstrip 59323 5a
Columbia Falls 59912 5a
Columbus 59019 5a
Condon 59826 5a
Conner 59827 5b
Conrad 59425 4a
Cooke City 59020 4b
Coram 59913 5a
Corvallis 59828 5b
Crane 59217 4a
Crow Agency 59022 4b
Culbertson 59218 4a
Custer 59024 4b
Cut Bank 59427 4a
Dagmar 59219 3b
Darby 59829 5b
Dayton 59914 6a
De Borgia 59830 6a
Decker 59025 5a
Deer Lodge 59722 4b
Dell 59724 5a
Denton 59430 4b
Dillon 59725 5a
Divide 59727 5a
Dixon 59831 6a
Dodson 59524 4a
Drummond 59832 5b
Dupuyer 59432 4b
Dutton 59433 4a
East Glacier Park 59434 4b
East Helena 59635 5a
Edgar 59026 5a
Ekalaka 59324 4b
Elliston 59728 4b
Elmo 59915 6a
Emigrant 59027 5a
Ennis 59729 5a
Essex 59916 5a
Ethridge 59435 4a
Eureka 59917 5a
Fairfield 59436 4b
Fairview 59221 4a
Fallon 59326 4a
Fishtail 59028 5a
Flaxville 59222 4a
Florence 59833 5b
Floweree 59440 4b
Forest Grove 59441 4b
Forsyth 59327 4b
Fort Benton 59442 4a
Fort Harrison 59636 4b
Fort Peck 59223 4a
Fort Shaw 59443 4b
Fort Smith 59035 5a
Fortine 59918 5a
Frazer 59225 4a
Frenchtown 59834 6a
Froid 59226 4a
Fromberg 59029 5a
Galata 59444 4a
Gallatin Gateway 59730 5a
Gardiner 59030 4b
Garrison 59731 4b
Garryowen 59031 4b
Geraldine 59446 4b
Geyser 59447 4b
Gildford 59525 3b
Glasgow 59230 4a
Glen 59732 4b
Glendive 59330 4a
Glentana 59240 3b
Gold Creek 59733 4b
Grantsdale 59835 5b
Grass Range 59032 4b
Great Falls 59401+ 4b
Greycliff 59033 5a
Hall 59837 5a
Hamilton 59840 5b
Hammond 59332 4b
Hardin 59034 4b
Harlem 59526 4a
Harlowton 59036 4b
Harrison 59735 5a
Hathaway 59333 4a
Haugan 59842 6a
Havre 59501 3b
Hays 59527 4b
Heart Butte 59448 4b
Helena 59601+ 4b–5a
Helmville 59843 5a
Heron 59844 6b
Highwood 59450 4b
Hilger 59451 4b
Hingham 59528 4a
Hinsdale 59241 3b
Hobson 59452 4b
Hogeland 59529 4a
Homestead 59242 3b
Hot Springs 59845 6a
Hungry Horse 59919 5b
Huntley 59037 4b
Huson 59846 5b
Hysham 59038 4b
Ingomar 59039 4b
Inverness 59530 4a
Ismay 59336 4a
Jackson 59736 5a
Jefferson City 59638 4b
Joliet 59041 5a
Joplin 59531 4a
Jordan 59337 4a
Judith Gap 59453 4b
Kalispell 59901+ 5b
Kevin 59454 4a
Kila 59920 5b
Kinsey 59338 4a
Kremlin 59532 4a
Lake Mc Donald 59921 5a
Lakeside 59922 6a
Lambert 59243 4a
Lame Deer 59043 5a
Larslan 59244 3b
Laurel 59044 5a
Lavina 59046 4b
Ledger 59456 4a
Lewistown 59457 4b
Libby 59923 6a
Lima 59739 5a
Lincoln 59639 4b
Lindsay 59339 4b
Livingston 59047 5a
Lloyd 59535 4b
Lodge Grass 59050 5a
Lolo 59847 5b
Loma 59460 4a
Lonepine 59848 6a
Loring 59537 3b
Lothair 59461 4a
Malta 59538 4a
Manhattan 59741 5a
Marion 59925 4b
Martin City 59926 5b
Martinsdale 59053 4b
Marysville 59640 4b
Mc Allister 59740 5a
Mc Leod 59052 5a
Medicine Lake 59247 3b
Melrose 59743 5a
Melstone 59054 4b
Melville 59055 4b
Miles City 59301 4b
Milltown 59851 5b
Missoula 59801+ 5b–6a
Moccasin 59462 4b
Molt 59057 4b
Monarch 59463 4b
Moore 59464 4b
Mosby 59058 4b
Musselshell 59059 4b
Nashua 59248 4a
Neihart 59465 4b
Norris 59745 5a
Noxon 59853 6a
Nye 59061 5a
Oilmont 59466 4a
Olive 59343 4b
Olney 59927 5a
Opheim 59250 3b
Otter 59062 5a
Outlook 59252 3b
Ovando 59854 5a
Pablo 59855 6a
Paradise 59856 6a
Park City 59063 5a
Peerless 59253 3b
Pendroy 59467 4b
Philipsburg 59858 5a
Pinesdale 59841 5b
Plains 59859 6a
Plentywood 59254 3b
Plevna 59344 4a
Polaris 59746 5a
Polebridge 59928 5a
Polson 59860 6a
Pompeys Pillar 59064 4b
Pony 59747 5a
Poplar 59255 4a
Powderville 59345 4b
Power 59468 4b
Pray 59065 5a
Proctor 59929 6a
Pryor 59066 5a
Ramsay 59748 4b
Rapelje 59067 4b
Ravalli 59863 6a
Raymond 59256 4a
Raynesford 59469 4b
Red Lodge 59068 5a
Redstone 59257 3b
Reed Point 59069 5a
Reserve 59258 3b
Rexford 59930 5b
Richey 59259 4a
Richland 59260 3b
Ringling 59642 4b
Roberts 59070 5a
Rollins 59931 6a
Ronan 59864 6a
Roscoe 59071 5a
Rosebud 59347 4b
Roundup 59072+ 4b
Roy 59471 4b
Rudyard 59540 3b
Ryegate 59074 4b
Saco 59261 3b
Saint Ignatius 59865 6a
Saint Marie 59231 4a
Saint Regis 59866 6a
Saint Xavier 59075 5a
Saltese 59867 6a
Sand Coulee 59472 4b
Sand Springs 59077 4b
Sanders 59076 4b
Savage 59262 4a
Scobey 59263 3b
Seeley Lake 59868 5a
Shawmut 59078 4b
Shelby 59474 4a
Shepherd 59079 4b
Sheridan 59749 5a
Sidney 59270 4a
Silver Gate 59081 4a
Silver Star 59751 5a
Simms 59477 4b
Somers 59932 6a
Springdale 59082 5a
Stanford 59479 4b
Stevensville 59870 5b
Stockett 59480 4b
Stryker 59933 5a
Sula 59871 5a
Sumatra 59083 4b
Sun River 59483 4a
Sunburst 59482 4a
Superior 59872 6a
Sweet Grass 59484 4a
Teigen 59084 4b
Terry 59349 4a
Thompson Falls 59873 6a
Three Forks 59752 5a
Toston 59643 5a
Townsend 59644 4b
Trego 59934 5a
Trout Creek 59874 6a
Troy 59935 6a
Turner 59542 4a
Twin Bridges 59754 5a
Two Dot 59085 4b
Ulm 59485 4a
Valier 59486 4b
Vandalia 59273 4a
Vaughn 59487 4a
Victor 59875 5b
Vida 59274 4a
Virginia City 59755 5a
Volborg 59351 4b
Warm Springs 59756 4b
West Glacier 59936 5a
West Yellowstone 59758 4b
Westby 59275 3b
White Sulphur Springs 59645 4b
Whitefish 59937 5a
Whitehall 59759 5a
Whitetail 59276 3b
Whitewater 59544 3b
Whitlash 59545 4a
Wibaux 59353 4a
Willard 59354 4b
Willow Creek 59760 5a
Wilsall 59086 4b
Winifred 59489 4b
Winnett 59087 4b
Winston 59647 5a
Wisdom 59761 5a
Wise River 59762 5a
Wolf Creek 59648 4b
Wolf Point 59201 4a
Worden 59088 4b
Wyola 59089 4b
Zortman 59546 4b
Zurich 59547 3b

Other states

Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware District of Columbia Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Nebraska Nevada New Hampshire New Jersey New Mexico New York North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Puerto Rico Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming

Zones: 2023 USDA Plant Hardiness Zone Map ZIP code data, USDA Agricultural Research Service and the PRISM Climate Group, Oregon State University (official map). Place names: GeoNames (CC BY 4.0). Each ZIP code gets one zone, but a ZIP code can cross a zone line, and hills, valleys and towns can be warmer or colder than the zone shown.

About the Hardiness Zone Map

The Hardiness Zone Map finds your USDA plant hardiness zone, also called your planting or growing zone, from your ZIP code. Zones are based on the average coldest winter night of the year: each zone is 10 °F wide and split into a and b halves of 5 °F, from zone 1a in Alaska to 13b in Puerto Rico. Plant labels and seed packets give the coldest zone a plant can survive, so knowing your zone tells you which perennials, shrubs and trees can stay outside all winter. Zones come from the official 2023 USDA map ZIP code data for all 50 states, Washington DC and Puerto Rico.

How to use it

1 Enter your 5-digit ZIP code and press Find my zone.
2 Read your zone and the average coldest winter temperature it stands for.
3 Open your state to see its zones and the zone of every city.
4 Choose plants rated for your zone number or a colder (lower) one.

Frequently asked questions

What growing zone is Montana?

Montana spans zones 3b–6b. Zone 4b is the most common, covering 32% of the state's ZIP codes. Enter your ZIP code above for your exact zone.

What planting zone is Billings, MT?

Billings is in USDA zone 5a. Its average coldest winter night is -20 to -15 °F.

What planting zone is Missoula, MT?

Missoula is in USDA zone 5b–6a, depending on the ZIP code. Its average coldest winter night is -15 to -5 °F.

What planting zone is Helena, MT?

Helena is in USDA zone 4b–5a, depending on the ZIP code. Its average coldest winter night is -25 to -15 °F.

What is the coldest zone in Montana?

The coldest part of Montana is zone 3b, with winter lows of -35 to -30 °F. The warmest is zone 6b, at -5 to 0 °F.

How are planting zones worked out?

Each zone is a 10 °F band of the average coldest winter night over 1991–2020, split into a and b halves of 5 °F. The map does not show summer heat, rainfall or frost dates, so check local advice before planting.

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