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Weather & Climate in Treynor, IA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Treynor 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 1,242 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 | 1,242 ft (379 m) |
| Area | 0.6 sq mi (1.5 km²) |
| Population Density | 1,889/sq mi |
| Coordinates | 41.2320°N, 95.6065°W |
| Timezone | America/Chicago |
| County | Pottawattamie County County |
| Nearest Airport | Eppley Airfield (OMA) 16 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
6 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 | 94 km | 5 km |
| Jul 16, 2004 | 6 km SSE of Riverton, Iowa | M3.5 | 67 km | 5 km |
| Aug 9, 1997 | 9 km NW of Clarkson, Nebraska | M3.4 | 146 km | 5 km |
| Feb 11, 1995 | 6 km E of Clearmont, Missouri | M3.1 | 98 km | 5 km |
| Jan 6, 2014 | 5 km NW of Liberty, Nebraska | M2.9 | 147 km | 5 km |
| Mar 31, 1993 | 2 km SE of Nemaha, Nebraska | M2.9 | 101 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
652 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 23 fatalities, 550 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Jun 27, 1953 | EF5 | 80 km | 0.1 mi | 1 |
| May 21, 2024 | EF4 | 68 km | 40.7 mi | 5 |
| Apr 26, 2024 | EF4 | 61 km | 31.9 mi | 0 |
| Apr 8, 1999 | EF4 | 73 km | 49.0 mi | 0 |
| May 24, 1989 | EF4 | 79 km | 49.0 mi | 0 |
| Mar 29, 1979 | EF4 | 92 km | 18.8 mi | 0 |
| Jun 26, 1976 | EF4 | 24 km | 5.1 mi | 0 |
| May 6, 1975 | EF4 | 39 km | 8.0 mi | 3 |
| Jun 22, 1964 | EF4 | 61 km | 11.9 mi | 0 |
| Apr 12, 1964 | EF4 | 70 km | 13.1 mi | 1 |
| May 10, 1959 | EF4 | 87 km | 41.1 mi | 0 |
| Apr 5, 1954 | EF4 | 78 km | 6.3 mi | 0 |
| Aug 13, 1952 | EF4 | 81 km | 26.7 mi | 0 |
| May 21, 2024 | EF3 | 54 km | 33.9 mi | 0 |
| Apr 26, 2024 | EF3 | 10 km | 40.3 mi | 1 |
| Apr 26, 2024 | EF3 | 25 km | 19.1 mi | 0 |
| Apr 26, 2024 | EF3 | 94 km | 5.3 mi | 0 |
| Apr 26, 2024 | EF3 | 12 km | 13.3 mi | 0 |
| Jun 11, 2008 | EF3 | 76 km | 14.2 mi | 4 |
| May 16, 1999 | EF3 | 46 km | 7.5 mi | 2 |
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 | 27 km |
| 2010 | UNNAMED | 629 | 29 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-4°C) | 0.7 in | Coldest, Driest |
| February | 27°F (-3°C) | 0.9 in | |
| March | 38°F (4°C) | 2.1 in | |
| April | 51°F (10°C) | 3.1 in | |
| May | 62°F (17°C) | 4.4 in | |
| June | 72°F (22°C) | 4.5 in | Wettest |
| July | 78°F (26°C) | 4.0 in | Warmest |
| August | 73°F (23°C) | 3.9 in | |
| September | 65°F (18°C) | 3.9 in | |
| October | 53°F (12°C) | 2.5 in | |
| November | 37°F (3°C) | 1.5 in | |
| December | 25°F (-4°C) | 1.0 in |
Treynor has a seasonal temperature swing of 54°F / from 24°F in January to 78°F in July. Total annual precipitation is 32.5 inches, with June being the wettest month (4.5") and January the driest (0.7").