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Weather & Climate in Leon, IA
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Leon experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 23°F in January while summers reach 74°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 39.3 inches. The area receives 28.5 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 1,066 feet.
Temperature
23°F Jan (-5°C)
74°F Jul (23°C)
| Annual Average | 49.6°F |
| 8% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 1,066 ft (325 m) |
| Area | 3.2 sq mi (8.2 km²) |
| Population Density | 573/sq mi |
| Coordinates | 40.7413°N, 93.7556°W |
| Timezone | America/Chicago |
| County | Decatur County County |
| Nearest Airport | Des Moines International (DSM) 53 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 23.6 / 100 |
| Social Vulnerability | 43.0 / 100 |
| Community Resilience | 41.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Relatively High |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
2 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.1.
| Feb 11, 1995 | 6 km E of Clearmont, Missouri | M3.1 | 104 km | 5 km |
| Jul 15, 2025 | 3 km W of Hale, Missouri | M2.5 | 131 km | 8 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
513 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 14 fatalities, 181 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Mar 5, 2022 | EF4 | 66 km | 70.6 mi | 6 |
| Apr 8, 1999 | EF4 | 57 km | 56.0 mi | 0 |
| Apr 8, 1999 | EF4 | 97 km | 49.0 mi | 0 |
| May 27, 1995 | EF4 | 67 km | 57.0 mi | 0 |
| May 24, 1989 | EF4 | 85 km | 49.0 mi | 0 |
| Jun 7, 1984 | EF4 | 43 km | 134.0 mi | 3 |
| Jun 2, 1980 | EF4 | 19 km | 31.2 mi | 0 |
| Apr 21, 1973 | EF4 | 49 km | 14.6 mi | 0 |
| May 20, 1959 | EF4 | 51 km | 17.2 mi | 0 |
| May 10, 1953 | EF4 | 39 km | 6.4 mi | 0 |
| Mar 5, 2022 | EF3 | 38 km | 11.3 mi | 1 |
| Aug 20, 2019 | EF3 | 61 km | 5.4 mi | 0 |
| Jun 22, 2015 | EF3 | 71 km | 11.1 mi | 0 |
| Apr 11, 2001 | EF3 | 66 km | 76.5 mi | 0 |
| Apr 8, 1999 | EF3 | 42 km | 39.0 mi | 0 |
| May 27, 1995 | EF3 | 28 km | 30.4 mi | 0 |
| Apr 14, 1994 | EF3 | 99 km | 14.0 mi | 0 |
| Mar 29, 1979 | EF3 | 53 km | 57.0 mi | 0 |
| May 5, 1971 | EF3 | 74 km | 2.0 mi | 0 |
| Apr 16, 1960 | EF3 | 75 km | 27.0 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 0.9 in | Coldest, Driest |
| February | 28°F (-2°C) | 1.0 in | |
| March | 39°F (4°C) | 2.3 in | |
| April | 51°F (11°C) | 3.5 in | |
| May | 61°F (16°C) | 4.4 in | Wettest |
| June | 71°F (21°C) | 4.3 in | |
| July | 74°F (23°C) | 4.3 in | Warmest |
| August | 73°F (23°C) | 4.3 in | |
| September | 65°F (18°C) | 4.3 in | |
| October | 53°F (12°C) | 3.0 in | |
| November | 39°F (4°C) | 2.1 in | |
| December | 27°F (-3°C) | 1.3 in |
Leon has a seasonal temperature swing of 52°F / from 23°F in January to 74°F in July. Total annual precipitation is 35.8 inches, with May being the wettest month (4.4") and January the driest (0.9").