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Garnavillo, IA
Full City Profile · Iowa · Clayton County County
3.2
/5.0
B
Good
815
Population
867/sq mi density
$81,250
Median Income
$35,177 per capita
$117,200
Home Value
$165,254 Zillow
$920
Median Rent
38.0% income on rent
49°F
Avg Temperature
260 sunny days/yr
145
Violent Crime/100K
1,114 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.5 / 5.0
$81,250 median income, 0.7% unemployment
A+
Affordability
5.0 / 5.0
$117,200 home value, $920/mo rent
F
Safety
1.0 / 5.0
145 violent crimes/100K
C
Education
2.4 / 5.0
17.6% bachelor's degree or higher
Garnavillo experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 19°F in January while summers reach 74°F in July. The area gets 260 sunny days per year. Annual precipitation totals 37.3 inches. The area receives 34.4 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
19°F Jan (-7°C)
74°F Jul (23°C)
| Annual Average | 48.5°F |
| 10% below US avg | |
| January Average | 19°F (-7°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 1,042 ft (318 m) |
| Area | 1.0 sq mi (2.6 km²) |
| Population Density | 867/sq mi |
| Coordinates | 42.8667°N, 91.2362°W |
| Timezone | America/Chicago |
| County | Clayton County County |
| Nearest Airport | Dubuque Regional (DBQ) 42 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 42.2 / 100 |
| Social Vulnerability | 27.6 / 100 |
| Community Resilience | 63.7 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 19°F (-7°C) | 0.9 in | Coldest, Driest |
| February | 22°F (-6°C) | 1.1 in | |
| March | 34°F (1°C) | 2.1 in | |
| April | 47°F (9°C) | 3.4 in | |
| May | 59°F (15°C) | 3.9 in | |
| June | 68°F (20°C) | 4.2 in | |
| July | 74°F (23°C) | 4.0 in | Warmest |
| August | 70°F (21°C) | 4.3 in | Wettest |
| September | 62°F (16°C) | 3.5 in | |
| October | 50°F (10°C) | 2.4 in | |
| November | 35°F (2°C) | 2.2 in | |
| December | 22°F (-6°C) | 1.4 in |
Garnavillo has a seasonal temperature swing of 55°F / from 19°F in January to 74°F in July. Total annual precipitation is 33.4 inches, with August being the wettest month (4.3") and January the driest (0.9").