All Countries
Deerfield Colony, MT
Full City Profile · Montana · Fergus County County
1.0
/5.0
F
Poor
20
Population
35/sq mi density
43°F
Avg Temperature
273 sunny days/yr
390
Violent Crime/100K
1,220 property/100K
F
Overall
1.0 / 5.0
Below average overall score based on economy, affordability, safety and education
F
Safety
1.0 / 5.0
390 violent crimes/100K (3% above avg)
Deerfield Colony has a cool climate with an average annual temperature of 43°F (6°C). Winters average 22°F in January while summers reach 66°F in July. The area gets 273 sunny days per year. Annual precipitation totals 15.8 inches. Air quality is rated Good with a median AQI of 26.
Temperature
22°F Jan (-5°C)
66°F Jul (19°C)
| Annual Average | 42.8°F |
| 21% below US avg | |
| January Average | 22°F (-5°C) |
| July Average | 66°F (19°C) |
| Sunny Days | 273 days/yr |
Geography
| Elevation | 3,463 ft (1,056 m) |
| Area | 0.6 sq mi (1.5 km²) |
| Population Density | 35/sq mi |
| Coordinates | 47.2571°N, 109.6769°W |
| Timezone | America/Denver |
| County | Fergus County County |
| Nearest Airport | Great Falls International (GTF) 81 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 26.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0469 ppm |
| NO₂ (Nitrogen Dioxide) | 1.7 ppb |
| PM2.5 (Fine Particles) | 5.3 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 45.1 / 100 |
| Social Vulnerability | 45.2 / 100 |
| Community Resilience | 70.3 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Very Low |
| Drought | Relatively Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-5°C) | 0.7 in | Coldest |
| February | 26°F (-3°C) | 0.4 in | Driest |
| March | 34°F (1°C) | 0.8 in | |
| April | 43°F (6°C) | 1.1 in | |
| May | 53°F (11°C) | 3.0 in | Wettest |
| June | 61°F (16°C) | 2.7 in | |
| July | 66°F (19°C) | 1.7 in | |
| August | 67°F (19°C) | 1.7 in | Warmest |
| September | 57°F (14°C) | 1.4 in | |
| October | 46°F (8°C) | 0.9 in | |
| November | 32°F (-0°C) | 0.5 in | |
| December | 24°F (-5°C) | 0.6 in |
Deerfield Colony has a seasonal temperature swing of 45°F / from 22°F in January to 67°F in August. Total annual precipitation is 15.5 inches, with May being the wettest month (3.0") and February the driest (0.4").