St. Olaf, IA
Full City Profile · Iowa · Clayton County County
3.8
/5.0
B+
Good
75
Population
313/sq mi density
$88,750
Median Income
$40,461 per capita
$76,700
Home Value
$283,956 Zillow
$775
Median Rent
31.3% income on rent
46°F
Avg Temperature
B+
Overall
3.8 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.2 / 5.0
$88,750 median income, 6.1% unemployment
A+
Affordability
5.0 / 5.0
$76,700 home value, $775/mo rent
C
Education
2.1 / 5.0
13.3% bachelor's degree or higher
St. Olaf experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 16°F in January while summers reach 71°F in July. Annual precipitation totals 38.8 inches. The area receives 35.6 inches of snow annually.
Temperature
16°F Jan (-9°C)
71°F Jul (22°C)
| Annual Average | 45.9°F |
| 15% below US avg | |
| January Average | 16°F (-9°C) |
| July Average | 71°F (22°C) |
Geography
| Elevation | 867 ft (264 m) |
| Area | 0.2 sq mi (0.6 km²) |
| Population Density | 313/sq mi |
| Coordinates | 42.9268°N, 91.3877°W |
| Timezone | America/Chicago |
| County | Clayton County County |
| Nearest Airport | Dubuque Regional (DBQ) 50 miles away |
Precipitation & Snow
Air Quality
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 | 16°F (-9°C) | 1.3 in | Coldest, Driest |
| February | 21°F (-6°C) | 1.3 in | |
| March | 33°F (1°C) | 2.0 in | |
| April | 46°F (8°C) | 4.0 in | |
| May | 58°F (14°C) | 4.7 in | |
| June | 68°F (20°C) | 6.7 in | Wettest |
| July | 71°F (22°C) | 4.6 in | Warmest |
| August | 69°F (21°C) | 3.9 in | |
| September | 61°F (16°C) | 3.6 in | |
| October | 49°F (10°C) | 2.9 in | |
| November | 35°F (2°C) | 2.3 in | |
| December | 23°F (-5°C) | 1.6 in |
St. Olaf has a seasonal temperature swing of 55°F / from 16°F in January to 71°F in July. Total annual precipitation is 38.8 inches, with June being the wettest month (6.7") and January the driest (1.3").