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Weather & Climate in Grafton, OH
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Grafton experiences four distinct seasons with an average annual temperature of 53°F (11°C). Winters average 29°F in January while summers reach 75°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 42.0 inches. The area receives 43.6 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 813 feet.
Temperature
29°F Jan (-2°C)
75°F Jul (24°C)
| Annual Average | 52.6°F |
| 3% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 813 ft (248 m) |
| Area | 4.7 sq mi (12.3 km²) |
| Population Density | 1,149/sq mi |
| Coordinates | 41.2841°N, 82.0300°W |
| Timezone | America/New_York |
| County | Lorain County County |
| Nearest Airport | Cleveland-Hopkins International (CLE) 13 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 86.3 / 100 |
| Social Vulnerability | 30.1 / 100 |
| Community Resilience | 95.9 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | No Rating |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
48 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.5.
| Sep 25, 1998 | 2 km SW of Adamsville, Pennsylvania | M4.5 | 139 km | 5 km |
| Jun 10, 2019 | 1 km NW of Timberlake, Ohio | M4.0 | 65 km | 2 km |
| Jan 26, 2001 | 8 km NNW of Edgewood, Ohio | M3.9 | 126 km | 5 km |
| Mar 12, 2007 | Ohio | M3.7 | 54 km | 5 km |
| Jun 30, 2003 | 6 km NW of Perry, Ohio | M3.6 | 90 km | 5 km |
| Aug 28, 2023 | 7 km SE of Madison, Ohio | M3.6 | 101 km | 5 km |
| Oct 16, 1993 | 8 km SSE of Madison, Ohio | M3.6 | 97 km | 5 km |
| Jun 20, 2006 | 9 km WNW of North Perry, Ohio | M3.5 | 91 km | 5 km |
| Mar 15, 1992 | 15 km NW of North Perry, Ohio | M3.5 | 96 km | 5 km |
| Apr 20, 2018 | Michigan | M3.4 | 124 km | 3 km |
| Jun 3, 2001 | 3 km N of Edgewood, Ohio | M3.4 | 126 km | 5 km |
| Jan 26, 1991 | 1 km NNE of Mayfield Heights, Ohio | M3.4 | 56 km | 5 km |
| Jun 30, 2004 | 2 km WNW of Madison, Ohio | M3.3 | 96 km | 5 km |
| Jul 1, 2013 | 5 km NNW of Fairport Harbor, Ohio | M3.2 | 84 km | 5 km |
| Mar 11, 2006 | 8 km NNW of Mentor-on-the-Lake, Ohio | M3.1 | 77 km | 5 km |
| Jan 9, 2008 | 6 km WNW of Mentor-on-the-Lake, Ohio | M3.1 | 70 km | 5 km |
| Feb 23, 2011 | 18 km NE of Leamington, Canada | M3.0 | 103 km | 5 km |
| Jun 5, 2011 | 5 km W of Lodi, Ohio | M3.0 | 29 km | 5 km |
| Mar 30, 2024 | 2 km SSW of Maple Ridge, Ohio | M3.0 | 92 km | 6 km |
| Apr 25, 2010 | 2 km WNW of Madison, Ohio | M3.0 | 96 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
337 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 50 fatalities, 851 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 31, 1985 | EF5 | 74 km | 47.0 mi | 18 |
| Apr 11, 1965 | EF4 | 19 km | 22.0 mi | 18 |
| Nov 10, 2002 | EF3 | 98 km | 21.0 mi | 1 |
| Jul 12, 1992 | EF3 | 7 km | 7.0 mi | 0 |
| Jul 12, 1992 | EF3 | 49 km | 8.0 mi | 0 |
| May 31, 1985 | EF3 | 88 km | 15.0 mi | 0 |
| May 2, 1983 | EF3 | 32 km | 12.0 mi | 1 |
| Jun 3, 1973 | EF3 | 51 km | 12.9 mi | 0 |
| Sep 29, 1966 | EF3 | 44 km | 4.5 mi | 0 |
| Apr 11, 1965 | EF3 | 95 km | 15.0 mi | 4 |
| Mar 14, 2024 | EF2 | 76 km | 10.3 mi | 0 |
| Aug 24, 2023 | EF2 | 82 km | 0.7 mi | 0 |
| Aug 24, 2023 | EF2 | 46 km | 1.5 mi | 0 |
| Jun 15, 2023 | EF2 | 57 km | 8.7 mi | 0 |
| Jun 15, 2023 | EF2 | 95 km | 3.4 mi | 0 |
| Apr 14, 2019 | EF2 | 75 km | 17.0 mi | 0 |
| Nov 5, 2017 | EF2 | 80 km | 0.6 mi | 0 |
| Nov 5, 2017 | EF2 | 89 km | 1.1 mi | 0 |
| Sep 4, 2017 | EF2 | 90 km | 16.7 mi | 0 |
| Sep 16, 2010 | EF2 | 57 km | 11.5 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 2.7 m (9 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1823 | LAKE ERIE | Unknown | 2.7 m | — | 141 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 2.2 in | |
| February | 27°F (-3°C) | 2.1 in | Coldest, Driest |
| March | 37°F (3°C) | 2.8 in | |
| April | 48°F (9°C) | 3.2 in | |
| May | 59°F (15°C) | 3.6 in | |
| June | 68°F (20°C) | 3.9 in | Wettest |
| July | 75°F (24°C) | 3.7 in | Warmest |
| August | 70°F (21°C) | 3.5 in | |
| September | 64°F (18°C) | 3.4 in | |
| October | 52°F (11°C) | 2.5 in | |
| November | 42°F (5°C) | 3.2 in | |
| December | 31°F (-1°C) | 2.8 in |
Grafton has a seasonal temperature swing of 47°F / from 27°F in February to 75°F in July. Total annual precipitation is 36.7 inches, with June being the wettest month (3.9") and February the driest (2.1").