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West Branch, IA
Full City Profile · Iowa · Johnson County County
3.5
/5.0
B+
Good
2,526
Population
983/sq mi density
$87,891
Median Income
$35,101 per capita
$226,700
Home Value
$289,094 Zillow
$958
Median Rent
22.5% income on rent
49°F
Avg Temperature
275 sunny days/yr
134
Violent Crime/100K
886 property/100K
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.6 / 5.0
$87,891 median income, 0.3% unemployment
A+
Affordability
5.0 / 5.0
$226,700 home value, $958/mo rent
F
Safety
1.0 / 5.0
134 violent crimes/100K
B
Education
3.3 / 5.0
28.7% bachelor's degree or higher
West Branch 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 36.5 inches. Air quality is rated Good with a median AQI of 43.
Temperature
20°F Jan (-7°C)
74°F Jul (23°C)
| Annual Average | 49.3°F |
| 9% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 740 ft (226 m) |
| Area | 3.2 sq mi (8.3 km²) |
| Population Density | 983/sq mi |
| Coordinates | 41.6662°N, 91.3442°W |
| Timezone | America/Chicago |
| County | Johnson County County |
| Nearest Airport | The Eastern Iowa (CID) 24 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| PM2.5 (Fine Particles) | 10.3 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 87.4 / 100 |
| Social Vulnerability | 11.4 / 100 |
| Community Resilience | 96.7 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Relatively Moderate |
| Hail | Relatively High |
| Strong Wind | Very High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively High |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 1.2 in | Coldest |
| February | 26°F (-3°C) | 1.1 in | Driest |
| March | 38°F (3°C) | 2.4 in | |
| April | 51°F (10°C) | 3.6 in | |
| May | 62°F (17°C) | 4.1 in | |
| June | 71°F (22°C) | 4.4 in | |
| July | 74°F (23°C) | 4.5 in | Warmest, Wettest |
| August | 73°F (23°C) | 4.2 in | |
| September | 65°F (18°C) | 4.1 in | |
| October | 53°F (12°C) | 2.9 in | |
| November | 38°F (4°C) | 2.2 in | |
| December | 25°F (-4°C) | 1.8 in |
West Branch has a seasonal temperature swing of 54°F / from 20°F in January to 74°F in July. Total annual precipitation is 36.4 inches, with July being the wettest month (4.5") and February the driest (1.1").