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Johnstown, WY
Full City Profile · Wyoming · Fremont County County
2.9
/5.0
C+
Fair
227
Population
7/sq mi density
$56,458
Median Income
$34,309 per capita
$725
Median Rent
20.0% income on rent
45°F
Avg Temperature
310 sunny days/yr
26
Violent Crime/100K
3,184 property/100K
C+
Overall
2.9 / 5.0
Fair overall score based on economy, affordability, safety and education
B+
Economy
3.5 / 5.0
$56,458 median income, 6.1% unemployment
A+
Affordability
5.0 / 5.0
F
Safety
1.0 / 5.0
26 violent crimes/100K
C
Education
2.1 / 5.0
13.5% bachelor's degree or higher
Johnstown 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 310 sunny days per year. Annual precipitation totals 8.8 inches. The area receives 28.4 inches of snow annually. Air quality is rated Good with a median AQI of 34.
Temperature
22°F Jan (-6°C)
70°F Jul (21°C)
| Annual Average | 45.0°F |
| 17% below US avg | |
| January Average | 22°F (-6°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 310 days/yr |
Geography
| Elevation | 5,237 ft (1,596 m) |
| Area | 32.2 sq mi (83.3 km²) |
| Population Density | 7/sq mi |
| Coordinates | 43.1138°N, 108.6899°W |
| Timezone | America/Denver |
| County | Fremont County County |
| Nearest Airport | Central Wyoming Regional (RIW) 12 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 34.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0494 ppm |
| NO₂ (Nitrogen Dioxide) | 2.8 ppb |
| SO₂ (Sulfur Dioxide) | 1.82 ppb |
| PM2.5 (Fine Particles) | 4.0 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 59.7 / 100 |
| Social Vulnerability | 52.8 / 100 |
| Community Resilience | 11.8 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Very Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-6°C) | 0.3 in | |
| February | 25°F (-4°C) | 0.2 in | Driest |
| March | 35°F (2°C) | 0.5 in | |
| April | 43°F (6°C) | 1.2 in | |
| May | 53°F (11°C) | 1.8 in | Wettest |
| June | 63°F (17°C) | 1.0 in | |
| July | 70°F (21°C) | 0.8 in | Warmest |
| August | 68°F (20°C) | 0.6 in | |
| September | 57°F (14°C) | 0.9 in | |
| October | 45°F (7°C) | 0.8 in | |
| November | 30°F (-1°C) | 0.5 in | |
| December | 20°F (-7°C) | 0.3 in | Coldest |
Johnstown has a seasonal temperature swing of 50°F / from 20°F in December to 70°F in July. Total annual precipitation is 8.9 inches, with May being the wettest month (1.8") and February the driest (0.2").