Unionville, MT
Full City Profile · Montana · Jefferson County County
3.9
/5.0
B+
Good
386
Population
302/sq mi density
$67,417
Median Income
$28,843 per capita
$446,300
Home Value
$466,393 Zillow
46°F
Avg Temperature
B+
Overall
3.9 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.3 / 5.0
$67,417 median income, 0.0% unemployment
C+
Affordability
2.9 / 5.0
$446,300 home value, /mo rent
A
Education
4.4 / 5.0
42.1% bachelor's degree or higher
Unionville experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 23°F in January while summers reach 71°F in July. Annual precipitation totals 11.4 inches. The area receives 37.2 inches of snow annually.
Temperature
23°F Jan (-5°C)
71°F Jul (21°C)
| Annual Average | 45.5°F |
| 16% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 71°F (21°C) |
Geography
| Elevation | 5,060 ft (1,542 m) |
| Area | 1.3 sq mi (3.3 km²) |
| Population Density | 302/sq mi |
| Coordinates | 46.5464°N, 112.0852°W |
| Timezone | America/Denver |
| County | Jefferson County County |
| Nearest Airport | Helena Regional (HLN) 6 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 21.6 / 100 |
| Social Vulnerability | 24.0 / 100 |
| Community Resilience | 34.4 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Moderate |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| 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 | 23°F (-5°C) | 0.4 in | Coldest, Driest |
| February | 27°F (-3°C) | 0.4 in | |
| March | 36°F (2°C) | 0.5 in | |
| April | 45°F (7°C) | 1.0 in | |
| May | 54°F (12°C) | 2.0 in | |
| June | 62°F (17°C) | 2.2 in | Wettest |
| July | 71°F (21°C) | 1.1 in | Warmest |
| August | 69°F (20°C) | 1.0 in | |
| September | 59°F (15°C) | 1.0 in | |
| October | 46°F (8°C) | 0.8 in | |
| November | 33°F (0°C) | 0.6 in | |
| December | 23°F (-5°C) | 0.5 in |
Unionville has a seasonal temperature swing of 48°F / from 23°F in January to 71°F in July. Total annual precipitation is 11.4 inches, with June being the wettest month (2.2") and January the driest (0.4").