Garrison, MT
Full City Profile · Montana · Powell County County
2.1
/5.0
C
Fair
138
Population
14/sq mi density
$46,250
Median Income
$20,338 per capita
$350,000
Home Value
$1,217,823 Zillow
40°F
Avg Temperature
C
Overall
2.1 / 5.0
Fair overall score based on economy, affordability, safety and education
C+
Economy
2.7 / 5.0
$46,250 median income, 15.2% unemployment
C
Affordability
2.4 / 5.0
$350,000 home value, /mo rent
F
Education
1.1 / 5.0
1.4% bachelor's degree or higher
Garrison has a cool climate with an average annual temperature of 40°F (4°C). Winters average 22°F in January while summers reach 62°F in July. Annual precipitation totals 14.6 inches. The area receives 30.5 inches of snow annually.
Temperature
22°F Jan (-6°C)
62°F Jul (16°C)
| Annual Average | 40.3°F |
| 25% below US avg | |
| January Average | 22°F (-6°C) |
| July Average | 62°F (16°C) |
Geography
| Elevation | 4,395 ft (1,340 m) |
| Area | 9.6 sq mi (25.0 km²) |
| Population Density | 14/sq mi |
| Coordinates | 46.5402°N, 112.8168°W |
| Timezone | America/Denver |
| County | Powell County County |
| Nearest Airport | Helena Regional (HLN) 40 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 10.0 / 100 |
| Social Vulnerability | 58.1 / 100 |
| Community Resilience | 19.4 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively Moderate |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-6°C) | 0.5 in | Driest |
| February | 25°F (-4°C) | 0.7 in | |
| March | 32°F (-0°C) | 1.3 in | |
| April | 39°F (4°C) | 1.1 in | |
| May | 48°F (9°C) | 2.2 in | |
| June | 54°F (12°C) | 2.7 in | Wettest |
| July | 62°F (16°C) | 1.5 in | Warmest |
| August | 61°F (16°C) | 1.3 in | |
| September | 52°F (11°C) | 1.4 in | |
| October | 41°F (5°C) | 1.0 in | |
| November | 28°F (-2°C) | 0.5 in | |
| December | 21°F (-6°C) | 0.5 in | Coldest |
Garrison has a seasonal temperature swing of 41°F / from 21°F in December to 62°F in July. Total annual precipitation is 14.6 inches, with June being the wettest month (2.7") and January the driest (0.5").