Shellsburg, IA
Full City Profile · Iowa · Linn County County
3.8
/5.0
B+
Good
752
Population
940/sq mi density
$69,750
Median Income
$33,674 per capita
$184,100
Home Value
$344,785 Zillow
$928
Median Rent
22.5% income on rent
46°F
Avg Temperature
B+
Overall
3.8 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.4 / 5.0
$69,750 median income, 2.0% unemployment
A+
Affordability
5.0 / 5.0
$184,100 home value, $928/mo rent
C
Education
2.1 / 5.0
14.1% bachelor's degree or higher
Shellsburg experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 17°F in January while summers reach 71°F in July. Annual precipitation totals 37.9 inches. The area receives 33.6 inches of snow annually. Air quality is rated Good with a median AQI of 44.
Temperature
17°F Jan (-8°C)
71°F Jul (22°C)
| Annual Average | 46.0°F |
| 15% below US avg | |
| January Average | 17°F (-8°C) |
| July Average | 71°F (22°C) |
Geography
| Elevation | 775 ft (236 m) |
| Area | 0.8 sq mi (2.0 km²) |
| Population Density | 940/sq mi |
| Coordinates | 42.0929°N, 91.8713°W |
| Timezone | America/Chicago |
| County | Linn County County |
| Nearest Airport | The Eastern Iowa (CID) 16 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 44.0 |
| Rating | Good |
| Good Days % | 64.2% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0481 ppm |
| SO₂ (Sulfur Dioxide) | 0.46 ppb |
| PM2.5 (Fine Particles) | 11.3 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 86.7 / 100 |
| Social Vulnerability | 15.4 / 100 |
| Community Resilience | 98.7 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively High |
| Strong Wind | Very High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-8°C) | 1.2 in | Coldest, Driest |
| February | 21°F (-6°C) | 1.3 in | |
| March | 34°F (1°C) | 2.1 in | |
| April | 47°F (8°C) | 3.9 in | |
| May | 58°F (14°C) | 5.0 in | |
| June | 68°F (20°C) | 5.6 in | Wettest |
| July | 71°F (22°C) | 4.2 in | Warmest |
| August | 69°F (20°C) | 4.2 in | |
| September | 62°F (16°C) | 3.7 in | |
| October | 49°F (9°C) | 3.2 in | |
| November | 35°F (2°C) | 2.1 in | |
| December | 23°F (-5°C) | 1.6 in |
Shellsburg has a seasonal temperature swing of 54°F / from 17°F in January to 71°F in July. Total annual precipitation is 37.9 inches, with June being the wettest month (5.6") and January the driest (1.2").