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Roy, MT
Full City Profile · Montana · Petroleum County County
2.9
/5.0
C+
Fair
133
Population
39/sq mi density
$50,000
Median Income
$24,347 per capita
$48,300
Home Value
$334,788 Zillow
$871
Median Rent
28.3% income on rent
45°F
Avg Temperature
273 sunny days/yr
390
Violent Crime/100K
1,220 property/100K
C+
Overall
2.9 / 5.0
Fair overall score based on economy, affordability, safety and education
B+
Economy
3.7 / 5.0
$50,000 median income, 0.9% unemployment
A+
Affordability
5.0 / 5.0
$48,300 home value, $871/mo rent
F
Safety
1.0 / 5.0
390 violent crimes/100K (3% above avg)
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. The area gets 273 sunny days per year. Annual precipitation totals 13.3 inches. The area receives 36.3 inches of snow annually. Air quality is rated Good with a median AQI of 26.
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) |
| Sunny Days | 273 days/yr |
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
| AQI Median | 26.0 |
| Rating | Good |
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) | 0.6 in | Coldest |
| February | 27°F (-3°C) | 0.4 in | Driest |
| March | 34°F (1°C) | 0.7 in | |
| April | 44°F (7°C) | 1.1 in | |
| May | 54°F (12°C) | 2.9 in | Wettest |
| June | 63°F (17°C) | 2.4 in | |
| July | 70°F (21°C) | 1.7 in | Warmest |
| August | 68°F (20°C) | 1.6 in | |
| September | 57°F (14°C) | 1.3 in | |
| October | 46°F (8°C) | 0.8 in | |
| November | 32°F (0°C) | 0.5 in | |
| December | 23°F (-5°C) | 0.6 in |
Roy has a seasonal temperature swing of 48°F / from 22°F in January to 70°F in July. Total annual precipitation is 14.5 inches, with May being the wettest month (2.9") and February the driest (0.4").