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Weather & Climate in Jefferson, OH
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Jefferson experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 26°F in January while summers reach 70°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 37.1 inches. Air quality is rated Good with a median AQI of 45. 62% of days have good air quality. The city sits at an elevation of 961 feet.
Temperature
26°F Jan (-3°C)
70°F Jul (21°C)
| Annual Average | 48.9°F |
| 9% below US avg | |
| January Average | 26°F (-3°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 961 ft (293 m) |
| Area | 1.0 sq mi (2.5 km²) |
| Population Density | 1,344/sq mi |
| Coordinates | 41.7384°N, 80.7688°W |
| Timezone | America/New_York |
| County | Ashtabula County County |
| Nearest Airport | Northeast Ohio Regional (JFN) 5 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 45.0 |
| Rating | Good |
| Good Days % | 62.0% |
| Unhealthy Days | 0 |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 62.6 / 100 |
| Social Vulnerability | 63.7 / 100 |
| Community Resilience | 88.7 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | No Rating |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Earthquake History
39 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 | 42 km | 5 km |
| Jun 10, 2019 | 1 km NW of Timberlake, Ohio | M4.0 | 58 km | 2 km |
| Jan 26, 2001 | 8 km NNW of Edgewood, Ohio | M3.9 | 23 km | 5 km |
| Mar 12, 2007 | Ohio | M3.7 | 72 km | 5 km |
| Aug 28, 2023 | 7 km SE of Madison, Ohio | M3.6 | 17 km | 5 km |
| Jun 30, 2003 | 6 km NW of Perry, Ohio | M3.6 | 36 km | 5 km |
| Oct 16, 1993 | 8 km SSE of Madison, Ohio | M3.6 | 21 km | 5 km |
| Jun 20, 2006 | 9 km WNW of North Perry, Ohio | M3.5 | 40 km | 5 km |
| Mar 15, 1992 | 15 km NW of North Perry, Ohio | M3.5 | 44 km | 5 km |
| Jan 26, 1991 | 1 km NNE of Mayfield Heights, Ohio | M3.4 | 61 km | 5 km |
| Jun 3, 2001 | 3 km N of Edgewood, Ohio | M3.4 | 19 km | 5 km |
| Jun 30, 2004 | 2 km WNW of Madison, Ohio | M3.3 | 26 km | 5 km |
| Jul 1, 2013 | 5 km NNW of Fairport Harbor, Ohio | M3.2 | 44 km | 5 km |
| Jan 9, 2008 | 6 km WNW of Mentor-on-the-Lake, Ohio | M3.1 | 55 km | 5 km |
| Mar 11, 2006 | 8 km NNW of Mentor-on-the-Lake, Ohio | M3.1 | 52 km | 5 km |
| Feb 23, 2011 | 18 km NE of Leamington, Canada | M3.0 | 145 km | 5 km |
| Apr 25, 2010 | 2 km WNW of Madison, Ohio | M3.0 | 26 km | 5 km |
| Jun 5, 2011 | 5 km W of Lodi, Ohio | M3.0 | 135 km | 5 km |
| Mar 30, 2024 | 2 km SSW of Maple Ridge, Ohio | M3.0 | 96 km | 6 km |
| Aug 7, 2000 | 2 km S of Limaville, Ohio | M2.9 | 93 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tornado History
229 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 65 fatalities, 812 injuries.
| Date | Rating | Distance | Path | Fatalities |
| May 31, 1985 | EF5 | 68 km | 47.0 mi | 18 |
| May 31, 1985 | EF4 | 35 km | 56.2 mi | 16 |
| May 31, 1985 | EF4 | 98 km | 29.0 mi | 7 |
| May 31, 1985 | EF4 | 71 km | 28.0 mi | 0 |
| May 31, 1985 | EF4 | 21 km | 14.0 mi | 12 |
| Jul 12, 1992 | EF3 | 90 km | 8.0 mi | 0 |
| May 31, 1985 | EF3 | 39 km | 15.0 mi | 0 |
| May 31, 1985 | EF3 | 80 km | 8.0 mi | 0 |
| May 31, 1985 | EF3 | 52 km | 23.0 mi | 2 |
| May 2, 1983 | EF3 | 86 km | 12.0 mi | 1 |
| Jun 3, 1973 | EF3 | 81 km | 12.9 mi | 0 |
| May 2, 1972 | EF3 | 55 km | 7.9 mi | 0 |
| Jun 2, 1971 | EF3 | 55 km | 29.3 mi | 0 |
| Jun 20, 1969 | EF3 | 99 km | 84.1 mi | 0 |
| Sep 29, 1966 | EF3 | 72 km | 4.5 mi | 0 |
| Aug 5, 1956 | EF3 | 66 km | 0.1 mi | 2 |
| Mar 1, 1955 | EF3 | 53 km | 2.5 mi | 1 |
| Aug 24, 2023 | EF2 | 71 km | 1.5 mi | 0 |
| Aug 24, 2023 | EF2 | 38 km | 0.7 mi | 0 |
| Oct 2, 2018 | EF2 | 34 km | 4.1 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 | — | 64 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-3°C) | 2.3 in | |
| February | 25°F (-4°C) | 2.1 in | Coldest, Driest |
| March | 35°F (1°C) | 2.9 in | |
| April | 45°F (7°C) | 3.4 in | |
| May | 56°F (13°C) | 3.5 in | |
| June | 65°F (18°C) | 4.1 in | Wettest |
| July | 70°F (21°C) | 3.8 in | Warmest |
| August | 69°F (20°C) | 4.0 in | |
| September | 62°F (17°C) | 4.0 in | |
| October | 51°F (11°C) | 3.5 in | |
| November | 41°F (5°C) | 3.9 in | |
| December | 31°F (-1°C) | 3.4 in |
Jefferson has a seasonal temperature swing of 45°F / from 25°F in February to 70°F in July. Total annual precipitation is 40.9 inches, with June being the wettest month (4.1") and February the driest (2.1").