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St. Joseph, IA
Full City Profile · Iowa · Humboldt County County
2.9
/5.0
C+
Fair
78
Population
91/sq mi density
$45,347
Median Income
$25,587 per capita
47°F
Avg Temperature
260 sunny days/yr
254
Violent Crime/100K
636 property/100K
C+
Overall
2.9 / 5.0
Fair overall score based on economy, affordability, safety and education
C+
Economy
2.7 / 5.0
$45,347 median income, 0.0% unemployment
F
Safety
1.0 / 5.0
254 violent crimes/100K
A+
Education
5.0 / 5.0
68.1% bachelor's degree or higher
St. Joseph experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 17°F in January while summers reach 73°F in July. The area gets 260 sunny days per year. Annual precipitation totals 35.8 inches. Air quality is rated Good with a median AQI of 43.
Temperature
17°F Jan (-8°C)
73°F Jul (23°C)
| Annual Average | 46.8°F |
| 13% below US avg | |
| January Average | 17°F (-8°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 1,142 ft (348 m) |
| Area | 0.9 sq mi (2.2 km²) |
| Population Density | 91/sq mi |
| Coordinates | 42.9123°N, 94.2309°W |
| Timezone | America/Chicago |
| County | Humboldt County County |
| Nearest Airport | Fort Dodge Regional (FOD) 25 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 24.1 / 100 |
| Social Vulnerability | 19.3 / 100 |
| Community Resilience | 74.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively High |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-8°C) | 0.7 in | Coldest, Driest |
| February | 20°F (-7°C) | 0.8 in | |
| March | 33°F (1°C) | 1.9 in | |
| April | 47°F (8°C) | 3.0 in | |
| May | 60°F (15°C) | 3.8 in | |
| June | 70°F (21°C) | 4.6 in | Wettest |
| July | 73°F (23°C) | 4.2 in | Warmest |
| August | 70°F (21°C) | 3.9 in | |
| September | 63°F (17°C) | 3.2 in | |
| October | 50°F (10°C) | 2.3 in | |
| November | 34°F (1°C) | 1.7 in | |
| December | 20°F (-7°C) | 1.0 in |
St. Joseph has a seasonal temperature swing of 56°F / from 17°F in January to 73°F in July. Total annual precipitation is 30.9 inches, with June being the wettest month (4.6") and January the driest (0.7").