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Weather & Climate in Underwood, IA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Underwood experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 24°F in January while summers reach 78°F in July. The area gets 275 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 31.9 inches. The area receives 27.1 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 1,058 feet.
Temperature
24°F Jan (-4°C)
78°F Jul (26°C)
| Annual Average | 52.4°F |
| 3% below US avg | |
| January Average | 24°F (-4°C) |
| July Average | 78°F (26°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 1,058 ft (322 m) |
| Area | 0.5 sq mi (1.2 km²) |
| Population Density | 896/sq mi |
| Coordinates | 41.3802°N, 95.6825°W |
| Timezone | America/Chicago |
| County | Pottawattamie County County |
| Nearest Airport | Eppley Airfield (OMA) 12 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 80.4 / 100 |
| Social Vulnerability | 21.9 / 100 |
| Community Resilience | 69.2 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | No Rating |
| Earthquake | Very Low |
| Wildfire | Relatively Low |
| Flood | Relatively Moderate |
| Hail | Relatively High |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Moderate |
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 | 109 km | 5 km |
| Jul 16, 2004 | 6 km SSE of Riverton, Iowa | M3.5 | 84 km | 5 km |
| Aug 9, 1997 | 9 km NW of Clarkson, Nebraska | M3.4 | 133 km | 5 km |
| Feb 11, 1995 | 6 km E of Clearmont, Missouri | M3.1 | 115 km | 5 km |
| Mar 31, 1993 | 2 km SE of Nemaha, Nebraska | M2.9 | 118 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
606 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 22 fatalities, 560 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 27, 1953 | EF5 | 82 km | 0.1 mi | 1 |
| May 21, 2024 | EF4 | 83 km | 40.7 mi | 5 |
| Apr 26, 2024 | EF4 | 58 km | 31.9 mi | 0 |
| Apr 8, 1999 | EF4 | 88 km | 49.0 mi | 0 |
| May 27, 1995 | EF4 | 97 km | 30.0 mi | 0 |
| May 24, 1989 | EF4 | 92 km | 49.0 mi | 0 |
| Jun 26, 1976 | EF4 | 10 km | 5.1 mi | 0 |
| May 6, 1975 | EF4 | 40 km | 8.0 mi | 3 |
| Jun 22, 1964 | EF4 | 78 km | 11.9 mi | 0 |
| Apr 12, 1964 | EF4 | 88 km | 13.1 mi | 1 |
| May 10, 1959 | EF4 | 89 km | 41.1 mi | 0 |
| Apr 5, 1954 | EF4 | 96 km | 6.3 mi | 0 |
| Aug 13, 1952 | EF4 | 77 km | 26.7 mi | 0 |
| Jul 15, 1950 | EF4 | 89 km | 10.0 mi | 0 |
| May 21, 2024 | EF3 | 71 km | 33.9 mi | 0 |
| Apr 26, 2024 | EF3 | 23 km | 13.3 mi | 0 |
| Apr 26, 2024 | EF3 | 97 km | 5.3 mi | 0 |
| Apr 26, 2024 | EF3 | 23 km | 19.1 mi | 0 |
| Apr 26, 2024 | EF3 | 9 km | 40.3 mi | 1 |
| Apr 9, 2011 | EF3 | 87 km | 3.4 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 | 35 km |
| 2010 | UNNAMED | 629 | 15 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-4°C) | 0.8 in | Coldest, Driest |
| February | 27°F (-3°C) | 0.8 in | |
| March | 38°F (4°C) | 2.1 in | |
| April | 51°F (10°C) | 3.0 in | |
| May | 62°F (17°C) | 4.4 in | Wettest |
| June | 71°F (22°C) | 4.3 in | |
| July | 78°F (26°C) | 3.9 in | Warmest |
| August | 73°F (23°C) | 3.6 in | |
| September | 65°F (18°C) | 3.6 in | |
| October | 53°F (11°C) | 2.4 in | |
| November | 37°F (3°C) | 1.5 in | |
| December | 25°F (-4°C) | 1.0 in |
Underwood has a seasonal temperature swing of 54°F / from 24°F in January to 78°F in July. Total annual precipitation is 31.5 inches, with May being the wettest month (4.4") and January the driest (0.8").