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Delmar, IA
Full City Profile · Iowa · Clinton County County
3.4
/5.0
B
Good
417
Population
549/sq mi density
$74,583
Median Income
$35,898 per capita
$123,400
Home Value
$145,575 Zillow
49°F
Avg Temperature
275 sunny days/yr
165
Violent Crime/100K
3,111 property/100K
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.5 / 5.0
$74,583 median income, 0.6% unemployment
A+
Affordability
5.0 / 5.0
$123,400 home value, /mo rent
F
Safety
1.0 / 5.0
165 violent crimes/100K
B
Education
3.1 / 5.0
26.6% bachelor's degree or higher
Delmar experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 20°F in January while summers reach 74°F in July. The area gets 275 sunny days per year. Annual precipitation totals 39.6 inches. The area receives 39.8 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
20°F Jan (-7°C)
74°F Jul (23°C)
| Annual Average | 49.0°F |
| 9% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 811 ft (247 m) |
| Area | 0.8 sq mi (2.0 km²) |
| Population Density | 549/sq mi |
| Coordinates | 41.9989°N, 90.6079°W |
| Timezone | America/Chicago |
| County | Clinton County County |
| Nearest Airport | Dubuque Regional (DBQ) 28 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 | 20°F (-7°C) | 1.3 in | Coldest |
| February | 24°F (-4°C) | 1.1 in | Driest |
| March | 36°F (2°C) | 2.4 in | |
| April | 49°F (9°C) | 3.4 in | |
| May | 61°F (16°C) | 3.9 in | |
| June | 70°F (21°C) | 4.5 in | Wettest |
| July | 74°F (23°C) | 3.9 in | Warmest |
| August | 71°F (22°C) | 4.3 in | |
| September | 63°F (17°C) | 4.0 in | |
| October | 52°F (11°C) | 2.6 in | |
| November | 37°F (3°C) | 2.4 in | |
| December | 24°F (-4°C) | 1.9 in |
Delmar has a seasonal temperature swing of 53°F / from 20°F in January to 74°F in July. Total annual precipitation is 35.6 inches, with June being the wettest month (4.5") and February the driest (1.1").