Grass Range, MT
Full City Profile · Montana · Petroleum County County
2.2
/5.0
C
Fair
97
Population
693/sq mi density
$900
Median Rent
42.5% income on rent
46°F
Avg Temperature
C
Overall
2.2 / 5.0
Fair overall score based on economy, affordability, safety and education
C
Education
2.2 / 5.0
15.1% bachelor's degree or higher
Grass Range experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 26°F in January while summers reach 68°F in July. Annual precipitation totals 17.9 inches. The area receives 50.1 inches of snow annually.
Temperature
26°F Jan (-4°C)
68°F Jul (20°C)
| Annual Average | 45.5°F |
| 16% below US avg | |
| January Average | 26°F (-4°C) |
| July Average | 68°F (20°C) |
Geography
| Elevation | 3,483 ft (1,062 m) |
| Area | 0.1 sq mi (0.4 km²) |
| Population Density | 693/sq mi |
| Coordinates | 47.0261°N, 108.8031°W |
| Timezone | America/Denver |
| County | Petroleum County County |
| Nearest Airport | Billings Logan International (BIL) 85 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 1.3 / 100 |
| Social Vulnerability | 27.4 / 100 |
| Community Resilience | 12.9 / 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 | Very Low |
| Lightning | Relatively Moderate |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-4°C) | 0.7 in | Coldest |
| February | 27°F (-3°C) | 0.5 in | Driest |
| March | 36°F (2°C) | 0.9 in | |
| April | 44°F (7°C) | 1.9 in | |
| May | 53°F (12°C) | 3.4 in | Wettest |
| June | 61°F (16°C) | 3.2 in | |
| July | 68°F (20°C) | 1.7 in | Warmest |
| August | 67°F (20°C) | 1.7 in | |
| September | 58°F (14°C) | 1.5 in | |
| October | 46°F (8°C) | 1.3 in | |
| November | 35°F (1°C) | 0.7 in | |
| December | 26°F (-3°C) | 0.6 in |
Grass Range has a seasonal temperature swing of 42°F / from 26°F in January to 68°F in July. Total annual precipitation is 17.9 inches, with May being the wettest month (3.4") and February the driest (0.5").