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Roy, UT
Full City Profile · Utah · Davis County County
3.3
/5.0
B
Good
39,021
Population
4,788/sq mi density
$91,112
Median Income
$33,893 per capita
$350,800
Home Value
$432,027 Zillow
$1,557
Median Rent
27.5% income on rent
52°F
Avg Temperature
316 sunny days/yr
141
Violent Crime/100K
1,195 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.8 / 5.0
$91,112 median income, 1.7% unemployment
A+
Affordability
4.5 / 5.0
$350,800 home value, $1,557/mo rent
F
Safety
1.0 / 5.0
141 violent crimes/100K
C+
Education
2.8 / 5.0
23.1% bachelor's degree or higher
Roy experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 29°F in January while summers reach 78°F in July. The area gets 316 sunny days per year. Annual precipitation totals 16.4 inches. Air quality is rated Good with a median AQI of 41.
Temperature
29°F Jan (-2°C)
78°F Jul (26°C)
| Annual Average | 51.7°F |
| 4% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 78°F (26°C) |
| Sunny Days | 316 days/yr |
Geography
| Elevation | 4,377 ft (1,334 m) |
| Area | 7.8 sq mi (20.3 km²) |
| Population Density | 4,788/sq mi |
| Coordinates | 41.1715°N, 112.0485°W |
| Timezone | America/Denver |
| County | Davis County County |
| Nearest Airport | Brigham City Regional (BMC) 26 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0457 ppm |
| NO₂ (Nitrogen Dioxide) | 16.6 ppb |
| PM2.5 (Fine Particles) | 6.9 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 87.8 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 97.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Relatively Moderate |
| Wildfire | Relatively Moderate |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Very High |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively Moderate |
| Coastal Flood | No Rating |
| Volcano | Very Low |
| Avalanche | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 3.6 m (12 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1909 | UTAH | Earthquake | 3.6 m | — | 89 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 1.7 in | Coldest |
| February | 32°F (0°C) | 1.6 in | |
| March | 42°F (5°C) | 1.9 in | |
| April | 49°F (10°C) | 2.0 in | |
| May | 58°F (15°C) | 2.4 in | Wettest |
| June | 68°F (20°C) | 1.1 in | |
| July | 78°F (26°C) | 0.8 in | Warmest, Driest |
| August | 74°F (23°C) | 0.9 in | |
| September | 64°F (18°C) | 1.5 in | |
| October | 51°F (11°C) | 1.9 in | |
| November | 39°F (4°C) | 1.7 in | |
| December | 29°F (-2°C) | 1.5 in |
Roy has a seasonal temperature swing of 50°F / from 29°F in January to 78°F in July. Total annual precipitation is 18.8 inches, with May being the wettest month (2.4") and July the driest (0.8").