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DeWitt, IA
Full City Profile · Iowa · Clinton County County
3.5
/5.0
B+
Good
5,535
Population
890/sq mi density
$84,474
Median Income
$42,588 per capita
$223,100
Home Value
$225,061 Zillow
$950
Median Rent
24.9% income on rent
50°F
Avg Temperature
275 sunny days/yr
155
Violent Crime/100K
2,018 property/100K
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.5 / 5.0
$84,474 median income, 3.0% unemployment
A+
Affordability
5.0 / 5.0
$223,100 home value, $950/mo rent
F
Safety
1.0 / 5.0
155 violent crimes/100K
B+
Education
3.7 / 5.0
33.6% bachelor's degree or higher
DeWitt experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 22°F in January while summers reach 74°F in July. The area gets 275 sunny days per year. Annual precipitation totals 37.9 inches. Air quality is rated Good with a median AQI of 43.
Temperature
22°F Jan (-6°C)
74°F Jul (23°C)
| Annual Average | 49.8°F |
| 8% below US avg | |
| January Average | 22°F (-6°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 705 ft (215 m) |
| Area | 6.0 sq mi (15.5 km²) |
| Population Density | 890/sq mi |
| Coordinates | 41.8227°N, 90.5441°W |
| Timezone | America/Chicago |
| County | Clinton County County |
| Nearest Airport | Quad Cities International (MLI) 26 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0477 ppm |
| SO₂ (Sulfur Dioxide) | 1.32 ppb |
| PM2.5 (Fine Particles) | 11.0 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 64.8 / 100 |
| Social Vulnerability | 34.6 / 100 |
| Community Resilience | 87.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | Relatively High |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-6°C) | 1.4 in | Coldest |
| February | 25°F (-4°C) | 1.1 in | Driest |
| March | 37°F (3°C) | 2.4 in | |
| April | 50°F (10°C) | 3.5 in | |
| May | 61°F (16°C) | 3.9 in | |
| June | 71°F (21°C) | 4.4 in | Wettest |
| July | 74°F (23°C) | 4.1 in | Warmest |
| August | 72°F (22°C) | 4.1 in | |
| September | 64°F (18°C) | 3.9 in | |
| October | 52°F (11°C) | 2.7 in | |
| November | 38°F (3°C) | 2.3 in | |
| December | 25°F (-4°C) | 1.9 in |
DeWitt has a seasonal temperature swing of 53°F / from 22°F in January to 74°F in July. Total annual precipitation is 35.7 inches, with June being the wettest month (4.4") and February the driest (1.1").