Glacier Country, Montana features average annual minimum temperatures between -30°F to 0°F (-34.4°C to -17.8°C) across six USDA Hardiness Zones (4a-6b), as declared by USDA update of 2023. Find your’s using our interactive Map and table given below.
The coldest USDA zones of Glacier Country, Montana covers area like East Glacier Park Village (Zones 4a-4b) and Roy (Zone 4b), and the warmest USDA zones here are in regions like Lakeside (Zones 5b-6b) and Thompson Falls (Zones 6a-6b).
Intermediate zones cover Kalispell (Zone 5b), Whitefish (Zones 5a-5b), and Eureka (Zone 5b).
Communities spanning multiple USDA zones include Bigfork (Zones 5b-6a), Columbia Falls (Zones 5a-5b), and Polson (Zones 5b-6a). Hot Springs (Zone 6a), Libby (Zones 5b-6a), and Seeley Lake (Zones 4a-5b) also lies in this region of Montana.
Glacier Country Montana USDA Planting Zones Map
Select or type your Glacier Country, Montana, city in selection box below to locate its USDA Planting zone on map given below.
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USDA Planting Zone
This zone’s data comes from the United States Department of Agriculture (USDA), with the most recent zone updates released in 2023
Planting Zones
Planting Zones
Glacier Country Montana USDA Growing Zones table
The table given below lists all the location in Glacier Country, Montana, (Kalispell, Whitefish, Columbia Falls, Libby, Troy, Eureka, Polson, Seeley Lake, Hot Springs, St Regis, Thompson Falls, Niarada, West Glacier, East Glacier Park Village, Bigfork, Lakeside, St. Mary, Apgar, Nyack, Martin City) alongwith there USDA Hardiness zones.
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6 USDA hardiness zones in Glacier Country Montana
The 6 USDA hardiness zones in Glacier Country Montana from Kalispell to Whitefish are Zone 4a, Zone 4b, Zone 5a, Zone 5b, Zone 6a, and Zone 6b, as declared by USDA update of 2023. The 6 USDA hardiness zones in Glacier Country Montana are listed below.
Zone 4a
Zone 4a includes locations like Seeley Lake with minimum winter temperatures ranging from -30°F to -25°F (-34°C to -32°C). Zone 4a represents the coldest growing conditions in Glacier Country Montana, found in higher elevation and mountainous areas where extreme winter cold limits plant survival.
These areas experience the harshest conditions due to high alpine elevations within Glacier National Park‘s interior, where continental air masses bring severe winter cold without geographic protection.
Zone 4b
Zone 4b includes locations like East Glacier Park Village, Roy, and also some part of Seeley Lake with minimum winter temperatures ranging from -25°F to -20°F (-32°C to -29°C). Zone 4b areas are mostly located near national park boundaries and mountainous regions.
These locations benefit from partial geographic protection provided by surrounding mountain ranges of Glacier National Park but are still effected by the elevated terrain effects.
Zone 5a
Zone 5a includes many gateway communities to Glacier National Park like Columbia Falls, West Glacier, Whitefish, and Seeley Lake with minimum winter temperatures ranging from -20°F to -15°F (-29°C to -26°C).
These areas experience milder conditions due to their position on the western side of the Continental Divide, which receives moderating Pacific air masses and benefits from lower elevation compared to the Glacier National park’s interior.
Zone 5b
Zone 5b is the most common hardiness zone in Glacier Country Montana, covering major population centers and lake communities like Bigfork, Eureka, Kalispell, Lakeside, Libby, Martin City, Niarada, Polson, Seeley Lake, and Whitefish with minimum winter temperatures ranging from -15°F to -10°F (-26°C to -23°C).
This zone’s climate is influenced by the moderating effects of Flathead Lake and other water bodies, which help stabilize temperatures and reduce extreme winter cold in surrounding communities.
Zone 6a
Zone 6a is found in lower elevation areas and communities near larger bodies of water where the moderating influence creates warmer winter conditions, it includes locations like Big Fork, Hot Springs, Lakeside, Libby, Niarada, Polson, Thompson Falls, and Troy with minimum winter temperatures ranging from -10°F to -5°F (-23°C to -21°C).
These locations benefit significantly from Flathead Lake’s thermal mass, which stores heat during summer and releases it gradually through winter, preventing extreme temperature drops.
Zone 6b
Zone 6b is the warmest growing conditions in Glacier Country Montana, typically found in river valleys and includes locations like Lakeside, Niarada, Thompson Falls, and Troy with minimum winter temperatures ranging from -5°F to 0°F (-21°C to -18°C).
These areas exist in sheltered river valleys and locations with optimal geographic positioning that provides maximum protection from continental Arctic air masses while benefiting from lower elevations and proximity to moderating water features.