Weather & Climate in Merriam, IN
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Merriam experiences four distinct seasons with an average annual temperature of 49°F (10°C). Winters average 24°F in January while summers reach 72°F in July. Annual precipitation totals 37.9 inches. The area receives 21.4 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 938 feet.
Temperature
24°F Jan (-4°C)
72°F Jul (22°C)
| Annual Average | 49.4°F |
| 9% below US avg | |
| January Average | 24°F (-4°C) |
| July Average | 72°F (22°C) |
Geography
| Elevation | 938 ft (286 m) |
| Area | 1.0 sq mi (2.6 km²) |
| Population Density | 312/sq mi |
| Coordinates | 41.2869°N, 85.4332°W |
| Timezone | America/Indiana/Indianapolis |
| County | Noble County County |
| Nearest Airport | Fort Wayne International (FWA) 25 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 44.2 / 100 |
| Social Vulnerability | 48.7 / 100 |
| Community Resilience | 71.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
8 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.2.
| May 2, 2015 | 5 km S of Galesburg, Michigan | M4.2 | 106 km | 4 km |
| Jun 30, 2015 | 5 km NNE of Burlington, Michigan | M3.3 | 101 km | 5 km |
| Jan 26, 2012 | 5 km NE of Topeka, Indiana | M3.0 | 33 km | 5 km |
| Apr 17, 1990 | 8 km NW of Fort Recovery, Ohio | M3.0 | 104 km | 5 km |
| Apr 4, 1994 | 2 km WNW of Minster, Ohio | M2.9 | 131 km | 5 km |
| May 12, 2006 | 2 km E of Lima, Ohio | M2.8 | 129 km | 5 km |
| Jun 12, 2015 | 6 km NW of Convoy, Ohio | M2.6 | 67 km | 5 km |
| Jan 30, 2004 | 2 km S of Rockford, Ohio | M2.5 | 95 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tornado History
484 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 147 fatalities, 1,803 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Nov 10, 2002 | EF4 | 79 km | 52.8 mi | 4 |
| Feb 18, 1992 | EF4 | 95 km | 2.8 mi | 0 |
| Apr 11, 1965 | EF4 | 72 km | 37.0 mi | 36 |
| Apr 11, 1965 | EF4 | 82 km | 52.5 mi | 4 |
| Apr 11, 1965 | EF4 | 59 km | 21.2 mi | 31 |
| Apr 11, 1965 | EF4 | 54 km | 90.3 mi | 23 |
| Apr 11, 1965 | EF4 | 43 km | 21.6 mi | 5 |
| Apr 11, 1965 | EF4 | 68 km | 80.5 mi | 21 |
| Mar 6, 1956 | EF4 | 81 km | 1.9 mi | 1 |
| Mar 31, 2023 | EF3 | 91 km | 6.4 mi | 0 |
| May 27, 2019 | EF3 | 67 km | 13.7 mi | 0 |
| May 27, 2019 | EF3 | 79 km | 12.8 mi | 0 |
| Aug 24, 2016 | EF3 | 46 km | 5.2 mi | 0 |
| Jun 5, 2010 | EF3 | 96 km | 7.5 mi | 0 |
| Oct 18, 2007 | EF3 | 62 km | 20.3 mi | 0 |
| May 30, 2004 | EF3 | 85 km | 4.5 mi | 0 |
| Nov 10, 2002 | EF3 | 81 km | 5.0 mi | 0 |
| Oct 24, 2001 | EF3 | 91 km | 47.0 mi | 1 |
| Mar 27, 1991 | EF3 | 41 km | 21.0 mi | 1 |
| Mar 27, 1991 | EF3 | 85 km | 5.0 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 | 129 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-4°C) | 2.3 in | Coldest |
| February | 27°F (-3°C) | 2.0 in | Driest |
| March | 37°F (3°C) | 2.5 in | |
| April | 49°F (9°C) | 3.9 in | |
| May | 60°F (15°C) | 4.6 in | Wettest |
| June | 69°F (21°C) | 4.1 in | |
| July | 72°F (22°C) | 3.5 in | Warmest |
| August | 70°F (21°C) | 3.7 in | |
| September | 64°F (18°C) | 3.1 in | |
| October | 52°F (11°C) | 3.0 in | |
| November | 40°F (4°C) | 2.9 in | |
| December | 30°F (-1°C) | 2.4 in |
Merriam has a seasonal temperature swing of 48°F / from 24°F in January to 72°F in July. Total annual precipitation is 37.9 inches, with May being the wettest month (4.6") and February the driest (2.0").