Roy, MT
Full City Profile · Montana · Petroleum County County
3.6
/5.0
B+
Good
133
Population
39/sq mi density
$50,000
Median Income
$24,347 per capita
$48,300
Home Value
$302,824 Zillow
$871
Median Rent
28.3% income on rent
45°F
Avg Temperature
B+
Overall
3.6 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.7 / 5.0
$50,000 median income, 1.4% unemployment
A+
Affordability
5.0 / 5.0
$48,300 home value, $871/mo rent
C
Education
2.1 / 5.0
13.5% bachelor's degree or higher
Roy has a cool climate with an average annual temperature of 45°F (7°C). Winters average 22°F in January while summers reach 70°F in July. Annual precipitation totals 13.3 inches. The area receives 36.3 inches of snow annually.
Temperature
22°F Jan (-5°C)
70°F Jul (21°C)
| Annual Average | 45.4°F |
| 16% below US avg | |
| January Average | 22°F (-5°C) |
| July Average | 70°F (21°C) |
Geography
| Elevation | 3,490 ft (1,064 m) |
| Area | 3.4 sq mi (8.8 km²) |
| Population Density | 39/sq mi |
| Coordinates | 47.3343°N, 108.9600°W |
| Timezone | America/Denver |
| County | Petroleum County County |
| Nearest Airport | Billings Logan International (BIL) 107 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 | 22°F (-5°C) | 0.5 in | Coldest |
| February | 25°F (-4°C) | 0.4 in | Driest |
| March | 35°F (2°C) | 0.5 in | |
| April | 44°F (7°C) | 1.3 in | |
| May | 54°F (12°C) | 2.5 in | |
| June | 62°F (17°C) | 2.6 in | Wettest |
| July | 70°F (21°C) | 1.7 in | Warmest |
| August | 69°F (21°C) | 1.3 in | |
| September | 59°F (15°C) | 0.9 in | |
| October | 46°F (8°C) | 0.7 in | |
| November | 33°F (1°C) | 0.5 in | |
| December | 24°F (-4°C) | 0.4 in |
Roy has a seasonal temperature swing of 48°F / from 22°F in January to 70°F in July. Total annual precipitation is 13.3 inches, with June being the wettest month (2.6") and February the driest (0.4").