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Weather & Climate in Twelve Mile, IN
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Twelve Mile experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 25°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 41.3 inches. The area receives 19.4 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 790 feet.
Temperature
25°F Jan (-4°C)
74°F Jul (23°C)
| Annual Average | 51.0°F |
| 6% below US avg | |
| January Average | 25°F (-4°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 790 ft (241 m) |
| Area | 0.6 sq mi (1.7 km²) |
| Population Density | 555/sq mi |
| Coordinates | 40.8641°N, 86.2160°W |
| Timezone | America/Indiana/Indianapolis |
| County | Cass County County |
| Nearest Airport | Fort Wayne International (FWA) 54 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 56.8 / 100 |
| Social Vulnerability | 68.7 / 100 |
| Community Resilience | 71.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
9 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.
| Jun 17, 2021 | Illinois-Indiana border region | M3.8 | 146 km | 6 km |
| Sep 12, 2004 | 4 km NW of Manilla, Indiana | M3.8 | 148 km | 2 km |
| Dec 20, 1990 | 5 km S of Stilesville, Indiana | M3.7 | 146 km | 5 km |
| Apr 14, 2000 | 4 km NW of Heritage Lake, Indiana | M3.6 | 131 km | 5 km |
| Dec 17, 1990 | Illinois-Indiana border region | M3.2 | 113 km | 10 km |
| Jan 26, 2012 | 5 km NE of Topeka, Indiana | M3.0 | 100 km | 5 km |
| Apr 17, 1990 | 8 km NW of Fort Recovery, Ohio | M3.0 | 124 km | 5 km |
| Jun 12, 2015 | 6 km NW of Convoy, Ohio | M2.6 | 123 km | 5 km |
| Jan 30, 2004 | 2 km S of Rockford, Ohio | M2.5 | 134 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
584 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 143 fatalities, 2,460 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Apr 26, 1994 | EF4 | 75 km | 14.0 mi | 3 |
| Mar 20, 1976 | EF4 | 79 km | 16.7 mi | 0 |
| Apr 3, 1974 | EF4 | 87 km | 108.7 mi | 18 |
| Apr 11, 1965 | EF4 | 95 km | 21.6 mi | 5 |
| Apr 11, 1965 | EF4 | 79 km | 52.5 mi | 4 |
| Apr 11, 1965 | EF4 | 80 km | 37.0 mi | 36 |
| Apr 11, 1965 | EF4 | 53 km | 48.0 mi | 25 |
| Apr 11, 1965 | EF4 | 74 km | 21.2 mi | 31 |
| Apr 11, 1965 | EF4 | 79 km | 21.8 mi | 0 |
| Mar 6, 1956 | EF4 | 64 km | 1.9 mi | 1 |
| Mar 31, 2023 | EF3 | 68 km | 6.4 mi | 0 |
| May 27, 2019 | EF3 | 15 km | 13.7 mi | 0 |
| May 27, 2019 | EF3 | 76 km | 12.8 mi | 0 |
| Aug 24, 2016 | EF3 | 45 km | 8.6 mi | 0 |
| Nov 17, 2013 | EF3 | 78 km | 37.9 mi | 0 |
| Jun 5, 2010 | EF3 | 25 km | 7.5 mi | 0 |
| Oct 18, 2007 | EF3 | 49 km | 20.3 mi | 0 |
| May 30, 2004 | EF3 | 17 km | 4.5 mi | 0 |
| Oct 24, 2001 | EF3 | 86 km | 47.0 mi | 1 |
| Jun 11, 1998 | EF3 | 53 km | 18.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 3.0 m (10 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1954 | MICHIGAN CITY, IN (LAKE MICHIGAN) | Avalanche | 3.0 m | 7 | 108 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 25°F (-4°C) | 2.0 in | Coldest |
| February | 27°F (-3°C) | 1.8 in | Driest |
| March | 38°F (3°C) | 2.8 in | |
| April | 49°F (9°C) | 3.8 in | |
| May | 60°F (16°C) | 4.0 in | Wettest |
| June | 70°F (21°C) | 3.9 in | |
| July | 74°F (23°C) | 4.0 in | Warmest |
| August | 71°F (22°C) | 3.6 in | |
| September | 64°F (18°C) | 3.4 in | |
| October | 53°F (11°C) | 2.8 in | |
| November | 41°F (5°C) | 3.2 in | |
| December | 29°F (-2°C) | 2.8 in |
Twelve Mile has a seasonal temperature swing of 49°F / from 25°F in January to 74°F in July. Total annual precipitation is 37.9 inches, with May being the wettest month (4.0") and February the driest (1.8").