Swan, IA
Full City Profile · Iowa · Marion County County
2.7
/5.0
C+
Fair
58
Population
94/sq mi density
$44,861
Median Income
$29,702 per capita
50°F
Avg Temperature
C+
Overall
2.7 / 5.0
Fair overall score based on economy, affordability, safety and education
B+
Economy
3.8 / 5.0
$44,861 median income, 0.0% unemployment
D
Education
1.6 / 5.0
7.1% bachelor's degree or higher
Swan 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 36.6 inches. The area receives 36.5 inches of snow annually.
Temperature
21°F Jan (-6°C)
74°F Jul (23°C)
| Annual Average | 49.5°F |
| 8% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 74°F (23°C) |
Geography
| Elevation | 753 ft (230 m) |
| Area | 0.6 sq mi (1.7 km²) |
| Population Density | 94/sq mi |
| Coordinates | 41.4676°N, 93.3095°W |
| Timezone | America/Chicago |
| County | Marion County County |
| Nearest Airport | Des Moines International (DSM) 20 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 34.4 / 100 |
| Social Vulnerability | 13.4 / 100 |
| Community Resilience | 96.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 1.0 in | Coldest, Driest |
| February | 26°F (-3°C) | 1.4 in | |
| March | 39°F (4°C) | 2.3 in | |
| April | 50°F (10°C) | 3.8 in | |
| May | 61°F (16°C) | 4.8 in | |
| June | 70°F (21°C) | 5.6 in | Wettest |
| July | 74°F (23°C) | 3.9 in | Warmest |
| August | 72°F (22°C) | 4.2 in | |
| September | 64°F (18°C) | 3.2 in | |
| October | 52°F (11°C) | 2.9 in | |
| November | 38°F (4°C) | 1.9 in | |
| December | 27°F (-3°C) | 1.6 in |
Swan has a seasonal temperature swing of 52°F / from 21°F in January to 74°F in July. Total annual precipitation is 36.6 inches, with June being the wettest month (5.6") and January the driest (1.0").