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New Castle, CO
Full City Profile · Colorado · Garfield County County
3.3
/5.0
B
Good
4,878
Population
1,951/sq mi density
$88,421
Median Income
$39,321 per capita
$488,600
Home Value
$638,030 Zillow
$1,627
Median Rent
31.4% income on rent
46°F
Avg Temperature
330 sunny days/yr
79
Violent Crime/100K
903 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.8 / 5.0
$88,421 median income, 0.8% unemployment
B+
Affordability
3.6 / 5.0
$488,600 home value, $1,627/mo rent
F
Safety
1.0 / 5.0
79 violent crimes/100K
B+
Education
3.9 / 5.0
36.4% bachelor's degree or higher
New Castle experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 24°F in January while summers reach 70°F in July. The area gets 330 sunny days per year. Annual precipitation totals 12.8 inches. The area receives 26.8 inches of snow annually. Air quality is rated Good with a median AQI of 41.
Temperature
24°F Jan (-5°C)
70°F Jul (21°C)
| Annual Average | 46.4°F |
| 14% below US avg | |
| January Average | 24°F (-5°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 5,825 ft (1,775 m) |
| Area | 2.7 sq mi (7.0 km²) |
| Population Density | 1,951/sq mi |
| Coordinates | 39.5776°N, 107.5265°W |
| Timezone | America/Denver |
| County | Garfield County County |
| Nearest Airport | Eagle County Regional (EGE) 33 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0506 ppm |
| NO₂ (Nitrogen Dioxide) | 3.9 ppb |
| PM2.5 (Fine Particles) | 4.1 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 64.5 / 100 |
| Social Vulnerability | 15.4 / 100 |
| Community Resilience | 12.3 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Moderate |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Very Low |
| Lightning | Relatively High |
| Ice Storm | Very Low |
| Drought | Relatively Low |
| Cold Wave | Very Low |
| Landslide | Relatively High |
| Volcano | Very Low |
| Avalanche | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-5°C) | 1.1 in | Coldest |
| February | 28°F (-2°C) | 1.1 in | Driest |
| March | 36°F (2°C) | 1.3 in | |
| April | 43°F (6°C) | 1.3 in | |
| May | 52°F (11°C) | 1.4 in | |
| June | 62°F (16°C) | 1.1 in | |
| July | 70°F (21°C) | 1.3 in | Warmest |
| August | 66°F (19°C) | 1.4 in | |
| September | 58°F (14°C) | 1.4 in | |
| October | 47°F (8°C) | 1.5 in | Wettest |
| November | 34°F (1°C) | 1.2 in | |
| December | 24°F (-5°C) | 1.4 in |
New Castle has a seasonal temperature swing of 47°F / from 24°F in January to 70°F in July. Total annual precipitation is 15.4 inches, with October being the wettest month (1.5") and February the driest (1.1").