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Weather & Climate in Greenville, IA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Greenville experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 16°F in January while summers reach 73°F in July. The area gets 260 sunny days per year, above the national average. Annual precipitation totals 31.0 inches. The area receives 43.3 inches of snow annually, making winter weather a significant factor for residents. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 1,393 feet.
Temperature
16°F Jan (-9°C)
73°F Jul (23°C)
| Annual Average | 46.1°F |
| 15% below US avg | |
| January Average | 16°F (-9°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 1,393 ft (425 m) |
| Area | 0.2 sq mi (0.4 km²) |
| Population Density | 412/sq mi |
| Coordinates | 43.0170°N, 95.1461°W |
| Timezone | America/Chicago |
| County | Clay County County |
| Nearest Airport | Fort Dodge Regional (FOD) 58 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 36.4 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 72.0 / 100 |
Hazard Breakdown
| Tornado | Relatively 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 Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
1 earthquake (M2.5+) recorded within 150 km since 1990. Strongest on record: M2.7.
| Jun 30, 2021 | 4 km E of Rembrandt, Iowa | M2.7 | 22 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
572 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 9 fatalities, 189 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 9, 2011 | EF4 | 40 km | 3.2 mi | 0 |
| Jun 25, 2010 | EF4 | 80 km | 13.7 mi | 0 |
| Jun 28, 1979 | EF4 | 62 km | 14.9 mi | 3 |
| May 4, 1977 | EF4 | 98 km | 2.0 mi | 0 |
| Jun 8, 1967 | EF4 | 96 km | 2.0 mi | 0 |
| May 5, 1965 | EF4 | 97 km | 9.9 mi | 0 |
| Aug 29, 1964 | EF4 | 75 km | 15.8 mi | 0 |
| Jun 9, 1954 | EF4 | 89 km | 9.9 mi | 1 |
| Jun 23, 1952 | EF4 | 65 km | 24.1 mi | 0 |
| Jul 14, 2021 | EF3 | 89 km | 10.8 mi | 0 |
| Apr 9, 2011 | EF3 | 75 km | 10.1 mi | 0 |
| Apr 9, 2011 | EF3 | 55 km | 29.4 mi | 0 |
| Jun 11, 2004 | EF3 | 16 km | 6.1 mi | 0 |
| Aug 7, 1994 | EF3 | 76 km | 4.5 mi | 0 |
| Jun 7, 1984 | EF3 | 78 km | 9.0 mi | 0 |
| Sep 20, 1980 | EF3 | 15 km | 1.5 mi | 0 |
| Jun 28, 1979 | EF3 | 77 km | 15.9 mi | 2 |
| Jun 10, 1977 | EF3 | 39 km | 14.9 mi | 0 |
| Sep 21, 1973 | EF3 | 92 km | 2.3 mi | 0 |
| Oct 1, 1971 | EF3 | 27 km | 11.2 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Wildfire History
1 wildfire (100+ acres) recorded within 100 km. Largest: DEWEYS PASTURE (641 acres, 2008).
| Year | Name | Acres Burned | Distance |
| 2008 | DEWEYS PASTURE | 641 | 26 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 16°F (-9°C) | 0.5 in | Coldest, Driest |
| February | 21°F (-6°C) | 0.7 in | |
| March | 33°F (0°C) | 1.9 in | |
| April | 47°F (8°C) | 2.8 in | |
| May | 60°F (15°C) | 3.5 in | |
| June | 69°F (21°C) | 4.1 in | Wettest |
| July | 73°F (23°C) | 4.0 in | Warmest |
| August | 70°F (21°C) | 3.9 in | |
| September | 62°F (17°C) | 3.4 in | |
| October | 49°F (10°C) | 2.1 in | |
| November | 33°F (0°C) | 1.2 in | |
| December | 19°F (-7°C) | 0.8 in |
Greenville has a seasonal temperature swing of 57°F / from 16°F in January to 73°F in July. Total annual precipitation is 29.0 inches, with June being the wettest month (4.1") and January the driest (0.5").