Weather & Climate in California Junction, IA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
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, a moderate snowfall amount. Air quality is rated Good with a median AQI of 42. 85% of days have good air quality. The city sits at an elevation of 1,008 feet.
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 |
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)
Earthquake History
5 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.6.
| Dec 17, 2009 | 2 km NW of Auburn, Nebraska | M3.6 | 129 km | 5 km |
| Jul 16, 2004 | 6 km SSE of Riverton, Iowa | M3.5 | 110 km | 5 km |
| Aug 9, 1997 | 9 km NW of Clarkson, Nebraska | M3.4 | 102 km | 5 km |
| Feb 11, 1995 | 6 km E of Clearmont, Missouri | M3.1 | 146 km | 5 km |
| Mar 31, 1993 | 2 km SE of Nemaha, Nebraska | M2.9 | 141 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
601 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 15 fatalities, 487 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 26, 2024 | EF4 | 49 km | 31.9 mi | 0 |
| Jun 16, 2014 | EF4 | 96 km | 15.8 mi | 0 |
| Jun 16, 2014 | EF4 | 98 km | 11.5 mi | 1 |
| Oct 4, 2013 | EF4 | 86 km | 24.7 mi | 0 |
| Jul 7, 1977 | EF4 | 88 km | 22.6 mi | 0 |
| Jun 26, 1976 | EF4 | 35 km | 5.1 mi | 0 |
| May 6, 1975 | EF4 | 44 km | 8.0 mi | 3 |
| Aug 13, 1952 | EF4 | 62 km | 26.7 mi | 0 |
| Jul 15, 1950 | EF4 | 57 km | 10.0 mi | 0 |
| Apr 26, 2024 | EF3 | 48 km | 13.3 mi | 0 |
| Apr 26, 2024 | EF3 | 41 km | 40.3 mi | 1 |
| Apr 26, 2024 | EF3 | 34 km | 19.1 mi | 0 |
| Apr 26, 2024 | EF3 | 94 km | 5.3 mi | 0 |
| Apr 9, 2011 | EF3 | 67 km | 3.4 mi | 0 |
| Jun 11, 2008 | EF3 | 29 km | 14.2 mi | 4 |
| May 16, 1999 | EF3 | 11 km | 7.5 mi | 2 |
| May 16, 1999 | EF3 | 11 km | 6.2 mi | 0 |
| Jul 5, 1994 | EF3 | 89 km | 1.8 mi | 0 |
| Jun 16, 1992 | EF3 | 19 km | 26.0 mi | 0 |
| May 27, 1991 | EF3 | 53 km | 6.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
2 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (4,195 acres, 2005).
| Year | Name | Acres Burned | Distance |
| 2005 | UNNAMED | 4,195 | 67 km |
| 2010 | UNNAMED | 629 | 20 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
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").