California Junction, IA
Full City Profile · Iowa · Harrison County County
5.0
/5.0
A+
Excellent
32
Population
70/sq mi density
50°F
Avg Temperature
A+
Overall
5.0 / 5.0
Strong
A+
Education
5.0 / 5.0
0.0% bachelor's degree or higher
California Junction experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 22°F in January while summers reach 75°F in July. Annual precipitation totals 33.4 inches. The area receives 28.7 inches of snow annually. Air quality is rated Good with a median AQI of 42.
Temperature
22°F Jan (-5°C)
75°F Jul (24°C)
| Annual Average | 50.2°F |
| 7% below US avg | |
| January Average | 22°F (-5°C) |
| July Average | 75°F (24°C) |
Geography
| Elevation | 1,008 ft (307 m) |
| Area | 0.5 sq mi (1.2 km²) |
| Population Density | 70/sq mi |
| Coordinates | 41.5602°N, 95.9948°W |
| Timezone | America/Chicago |
| County | Harrison County County |
| Nearest Airport | Eppley Airfield (OMA) 19 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
| Good Days % | 85.2% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0488 ppm |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 31.3 / 100 |
| Social Vulnerability | 44.2 / 100 |
| Community Resilience | 69.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | No Rating |
| 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 Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-5°C) | 0.8 in | Coldest, Driest |
| February | 27°F (-3°C) | 0.9 in | |
| March | 39°F (4°C) | 1.8 in | |
| April | 50°F (10°C) | 3.3 in | |
| May | 61°F (16°C) | 5.0 in | |
| June | 71°F (22°C) | 5.1 in | Wettest |
| July | 75°F (24°C) | 3.9 in | Warmest |
| August | 73°F (23°C) | 4.2 in | |
| September | 65°F (19°C) | 3.3 in | |
| October | 53°F (12°C) | 2.4 in | |
| November | 39°F (4°C) | 1.4 in | |
| December | 27°F (-3°C) | 1.3 in |
California Junction has a seasonal temperature swing of 53°F / from 22°F in January to 75°F in July. Total annual precipitation is 33.4 inches, with June being the wettest month (5.1") and January the driest (0.8").