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Weather & Climate in Colwell, IA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Colwell experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 17°F in January while summers reach 72°F in July. The area gets 260 sunny days per year, above the national average. Annual precipitation totals 37.7 inches. The area receives 37.5 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 1,147 feet.
Temperature
17°F Jan (-9°C)
72°F Jul (22°C)
| Annual Average | 46.5°F |
| 14% below US avg | |
| January Average | 17°F (-9°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 1,147 ft (350 m) |
| Area | 0.2 sq mi (0.5 km²) |
| Population Density | 329/sq mi |
| Coordinates | 43.1572°N, 92.5916°W |
| Timezone | America/Chicago |
| County | Floyd County County |
| Nearest Airport | Northeast Iowa Regional (CCY) 6 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 47.7 / 100 |
| Social Vulnerability | 46.0 / 100 |
| Community Resilience | 83.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Moderate |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively High |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tornado History
592 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 54 fatalities, 1,198 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 25, 2008 | EF5 | 72 km | 41.0 mi | 9 |
| May 15, 1968 | EF5 | 61 km | 62.1 mi | 13 |
| May 15, 1968 | EF5 | 76 km | 13.1 mi | 5 |
| Oct 14, 1966 | EF5 | 95 km | 9.7 mi | 6 |
| Jun 17, 2010 | EF4 | 97 km | 16.9 mi | 1 |
| Jul 12, 1971 | EF4 | 14 km | 10.9 mi | 0 |
| Apr 30, 1967 | EF4 | 50 km | 13.3 mi | 0 |
| Apr 30, 1967 | EF4 | 57 km | 7.6 mi | 0 |
| Apr 30, 1967 | EF4 | 82 km | 38.7 mi | 5 |
| May 5, 1965 | EF4 | 23 km | 41.6 mi | 0 |
| Sep 16, 1962 | EF4 | 91 km | 0.5 mi | 0 |
| Sep 1, 1961 | EF4 | 54 km | 26.6 mi | 0 |
| May 10, 1953 | EF4 | 76 km | 26.6 mi | 0 |
| May 10, 1953 | EF4 | 36 km | 162.0 mi | 2 |
| Jun 12, 2013 | EF3 | 94 km | 6.2 mi | 0 |
| Jun 17, 2010 | EF3 | 85 km | 5.0 mi | 0 |
| Jun 17, 2010 | EF3 | 89 km | 4.3 mi | 0 |
| Jun 17, 2010 | EF3 | 90 km | 18.2 mi | 0 |
| May 25, 2008 | EF3 | 78 km | 32.0 mi | 0 |
| Jun 11, 2004 | EF3 | 27 km | 12.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-9°C) | 0.9 in | Coldest |
| February | 21°F (-6°C) | 0.9 in | Driest |
| March | 33°F (1°C) | 2.1 in | |
| April | 47°F (8°C) | 3.4 in | |
| May | 59°F (15°C) | 4.2 in | |
| June | 69°F (20°C) | 4.8 in | Wettest |
| July | 72°F (22°C) | 4.5 in | Warmest |
| August | 70°F (21°C) | 4.5 in | |
| September | 61°F (16°C) | 3.6 in | |
| October | 50°F (10°C) | 2.6 in | |
| November | 34°F (1°C) | 2.1 in | |
| December | 20°F (-7°C) | 1.2 in |
Colwell has a seasonal temperature swing of 55°F / from 17°F in January to 72°F in July. Total annual precipitation is 34.7 inches, with June being the wettest month (4.8") and February the driest (0.9").