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Boulder, MT
Full City Profile · Montana · Jefferson County County
3.2
/5.0
B
Good
1,326
Population
1,184/sq mi density
$61,250
Median Income
$32,483 per capita
$194,800
Home Value
$340,651 Zillow
$692
Median Rent
13.8% income on rent
43°F
Avg Temperature
273 sunny days/yr
156
Violent Crime/100K
782 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.9 / 5.0
$61,250 median income, 4.0% unemployment
A+
Affordability
4.9 / 5.0
$194,800 home value, $692/mo rent
F
Safety
1.0 / 5.0
156 violent crimes/100K
B
Education
3.1 / 5.0
26.5% bachelor's degree or higher
Boulder has a cool climate with an average annual temperature of 43°F (6°C). Winters average 24°F in January while summers reach 65°F in July. The area gets 273 sunny days per year. Annual precipitation totals 10.8 inches. Air quality is rated Good with a median AQI of 26.
Temperature
24°F Jan (-5°C)
65°F Jul (19°C)
| Annual Average | 42.6°F |
| 21% below US avg | |
| January Average | 24°F (-5°C) |
| July Average | 65°F (19°C) |
| Sunny Days | 273 days/yr |
Geography
| Elevation | 4,906 ft (1,495 m) |
| Area | 1.1 sq mi (2.9 km²) |
| Population Density | 1,184/sq mi |
| Coordinates | 46.2358°N, 112.1197°W |
| Timezone | America/Denver |
| County | Jefferson County County |
| Nearest Airport | Helena Regional (HLN) 26 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 26.0 |
| Rating | Good |
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 | 24°F (-5°C) | 0.7 in | |
| February | 26°F (-3°C) | 0.4 in | Driest |
| March | 32°F (0°C) | 0.8 in | |
| April | 40°F (4°C) | 0.9 in | |
| May | 48°F (9°C) | 2.1 in | |
| June | 57°F (14°C) | 2.2 in | Wettest |
| July | 65°F (19°C) | 1.4 in | Warmest |
| August | 62°F (17°C) | 1.4 in | |
| September | 53°F (12°C) | 1.3 in | |
| October | 43°F (6°C) | 0.7 in | |
| November | 30°F (-1°C) | 0.6 in | |
| December | 22°F (-6°C) | 0.6 in | Coldest |
Boulder has a seasonal temperature swing of 44°F / from 22°F in December to 65°F in July. Total annual precipitation is 13.0 inches, with June being the wettest month (2.2") and February the driest (0.4").