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
$279,823 Zillow
$978
Median Rent
29.7% income on rent
50°F
Avg Temperature
146
Violent Crime/100K
563 property/100K
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.5 / 5.0
$87,105 median income, 3.4% unemployment
A+
Affordability
5.0 / 5.0
$230,800 home value, $978/mo rent
F
Safety
1.0 / 5.0
146 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. 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 44.
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) |
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 | 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 | 21°F (-6°C) | 1.2 in | Coldest, Driest |
| February | 26°F (-3°C) | 1.3 in | |
| March | 38°F (3°C) | 2.1 in | |
| April | 51°F (11°C) | 4.0 in | |
| May | 62°F (17°C) | 4.7 in | |
| June | 71°F (22°C) | 5.7 in | Wettest |
| July | 74°F (24°C) | 4.5 in | Warmest |
| August | 72°F (22°C) | 4.4 in | |
| September | 65°F (18°C) | 4.0 in | |
| October | 53°F (12°C) | 3.0 in | |
| November | 39°F (4°C) | 2.2 in | |
| December | 27°F (-3°C) | 1.7 in |
Marion has a seasonal temperature swing of 53°F / from 21°F in January to 74°F in July. Total annual precipitation is 38.8 inches, with June being the wettest month (5.7") and January the driest (1.2").