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Marion, IA
Full City Profile · Iowa · Linn County County
3.7
/5.0
B+
Good
41,690
Population
2,316/sq mi density
$87,105
Median Income
$43,334 per capita
$230,800
Home Value
$268,012 Zillow
$978
Median Rent
29.7% income on rent
50°F
Avg Temperature
260 sunny days/yr
167
Violent Crime/100K
1,278 property/100K
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.6 / 5.0
$87,105 median income, 2.3% unemployment
A+
Affordability
5.0 / 5.0
$230,800 home value, $978/mo rent
F
Safety
1.0 / 5.0
167 violent crimes/100K
A
Education
4.1 / 5.0
39.2% bachelor's degree or higher
Marion experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 21°F in January while summers reach 74°F in July. The area gets 260 sunny days per year. Annual precipitation totals 38.8 inches. The area receives 34.3 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
21°F Jan (-6°C)
74°F Jul (24°C)
| Annual Average | 49.9°F |
| 8% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 74°F (24°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 827 ft (252 m) |
| Area | 17.6 sq mi (45.6 km²) |
| Population Density | 2,316/sq mi |
| Coordinates | 42.0454°N, 91.5862°W |
| Timezone | America/Chicago |
| County | Linn County County |
| Nearest Airport | The Eastern Iowa (CID) 12 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
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 | 21°F (-6°C) | 1.1 in | Coldest |
| February | 24°F (-4°C) | 1.0 in | Driest |
| March | 36°F (2°C) | 2.2 in | |
| April | 49°F (10°C) | 3.4 in | |
| May | 61°F (16°C) | 4.1 in | |
| June | 70°F (21°C) | 4.7 in | Wettest |
| July | 74°F (24°C) | 4.3 in | Warmest |
| August | 72°F (22°C) | 4.4 in | |
| September | 63°F (17°C) | 4.1 in | |
| October | 52°F (11°C) | 2.6 in | |
| November | 37°F (3°C) | 2.1 in | |
| December | 24°F (-5°C) | 1.5 in |
Marion has a seasonal temperature swing of 53°F / from 21°F in January to 74°F in July. Total annual precipitation is 35.4 inches, with June being the wettest month (4.7") and February the driest (1.0").