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St. Donatus, IA
Full City Profile · Iowa · Jackson County County
2.5
/5.0
C+
Fair
131
Population
354/sq mi density
$41,813
Median Income
$27,417 per capita
$207,400
Home Value
$195,611 Zillow
$945
Median Rent
51.0% income on rent
47°F
Avg Temperature
260 sunny days/yr
248
Violent Crime/100K
2,590 property/100K
C+
Overall
2.5 / 5.0
Fair overall score based on economy, affordability, safety and education
B+
Economy
3.6 / 5.0
$41,813 median income, 0.0% unemployment
B+
Affordability
3.9 / 5.0
$207,400 home value, $945/mo rent
F
Safety
1.0 / 5.0
248 violent crimes/100K
D
Education
1.6 / 5.0
7.8% bachelor's degree or higher
St. Donatus experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 19°F in January while summers reach 72°F in July. The area gets 260 sunny days per year. Annual precipitation totals 38.2 inches. The area receives 42.5 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
19°F Jan (-7°C)
72°F Jul (22°C)
| Annual Average | 47.2°F |
| 13% below US avg | |
| January Average | 19°F (-7°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 677 ft (206 m) |
| Area | 0.4 sq mi (1.0 km²) |
| Population Density | 354/sq mi |
| Coordinates | 42.3624°N, 90.5422°W |
| Timezone | America/Chicago |
| County | Jackson County County |
| Nearest Airport | Dubuque Regional (DBQ) 9 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 36.1 / 100 |
| Social Vulnerability | 15.9 / 100 |
| Community Resilience | 75.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Relatively 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) | 1.1 in | Coldest, Driest |
| February | 24°F (-5°C) | 1.2 in | |
| March | 35°F (2°C) | 2.3 in | |
| April | 48°F (9°C) | 3.3 in | |
| May | 59°F (15°C) | 3.7 in | |
| June | 69°F (20°C) | 4.3 in | Wettest |
| July | 72°F (22°C) | 3.7 in | Warmest |
| August | 71°F (22°C) | 4.3 in | |
| September | 62°F (17°C) | 3.9 in | |
| October | 51°F (11°C) | 2.5 in | |
| November | 36°F (2°C) | 2.4 in | |
| December | 24°F (-5°C) | 1.6 in |
St. Donatus has a seasonal temperature swing of 53°F / from 19°F in January to 72°F in July. Total annual precipitation is 34.3 inches, with June being the wettest month (4.3") and January the driest (1.1").