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Altona, CO
Full City Profile · Colorado · Boulder County County
3.7
/5.0
B+
Good
532
Population
315/sq mi density
$250,001
Median Income
$171,369 per capita
$1,168,400
Home Value
$534,532 Zillow
$3,501
Median Rent
51.0% income on rent
50°F
Avg Temperature
316 sunny days/yr
232
Violent Crime/100K
2,663 property/100K
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.8 / 5.0
$250,001 median income, 3.4% unemployment
A
Affordability
4.0 / 5.0
$1,168,400 home value, $3,501/mo rent
F
Safety
1.0 / 5.0
232 violent crimes/100K
A+
Education
5.0 / 5.0
71.3% bachelor's degree or higher
Altona experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 29°F in January while summers reach 73°F in July. The area gets 316 sunny days per year. Annual precipitation totals 15.2 inches. Air quality is rated Good with a median AQI of 41.
Temperature
29°F Jan (-1°C)
73°F Jul (23°C)
| Annual Average | 50.0°F |
| 7% below US avg | |
| January Average | 29°F (-1°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 316 days/yr |
Geography
| Elevation | 6,017 ft (1,834 m) |
| Area | 1.7 sq mi (4.5 km²) |
| Population Density | 315/sq mi |
| Coordinates | 40.1219°N, 105.2962°W |
| Timezone | America/Denver |
| County | Boulder County County |
| Nearest Airport | Northern Colorado Regional (FNL) 27 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0497 ppm |
| PM2.5 (Fine Particles) | 5.9 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 90.7 / 100 |
| Social Vulnerability | 11.4 / 100 |
| Community Resilience | 91.2 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Earthquake | Relatively Low |
| Wildfire | Relatively High |
| Flood | Relatively Moderate |
| Hail | Relatively High |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Very High |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-1°C) | 0.6 in | Coldest, Driest |
| February | 33°F (1°C) | 0.6 in | |
| March | 39°F (4°C) | 1.7 in | |
| April | 46°F (8°C) | 2.3 in | |
| May | 56°F (13°C) | 2.7 in | Wettest |
| June | 65°F (18°C) | 1.9 in | |
| July | 73°F (23°C) | 1.9 in | Warmest |
| August | 69°F (21°C) | 1.6 in | |
| September | 61°F (16°C) | 1.6 in | |
| October | 50°F (10°C) | 1.2 in | |
| November | 37°F (3°C) | 1.2 in | |
| December | 31°F (-0°C) | 0.7 in |
Altona has a seasonal temperature swing of 44°F / from 29°F in January to 73°F in July. Total annual precipitation is 17.9 inches, with May being the wettest month (2.7") and January the driest (0.6").