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Weather & Climate in Delaware, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Delaware experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 21°F in January while summers reach 69°F in July. The area gets 265 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 38.9 inches. The area receives 11.6 inches of snow annually. The city sits at an elevation of 705 feet.
Temperature
21°F Jan (-6°C)
69°F Jul (21°C)
| Annual Average | 46.2°F |
| 14% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 265 days/yr |
Geography
| Elevation | 705 ft (215 m) |
| Area | 227.1 sq mi (588.2 km²) |
| Population Density | 11/sq mi |
| Coordinates | 42.9168°N, 81.4165°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
32 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.0.
| Jun 10, 2019 | 1 km NW of Timberlake, Ohio | M4.0 | 138 km | 2 km |
| Jan 26, 2001 | 8 km NNW of Edgewood, Ohio | M3.9 | 120 km | 5 km |
| Oct 16, 1993 | 8 km SSE of Madison, Ohio | M3.6 | 140 km | 5 km |
| Jun 30, 2003 | 6 km NW of Perry, Ohio | M3.6 | 125 km | 5 km |
| Aug 28, 2023 | 7 km SE of Madison, Ohio | M3.6 | 137 km | 5 km |
| Jun 20, 2006 | 9 km WNW of North Perry, Ohio | M3.5 | 121 km | 5 km |
| Mar 15, 1992 | 15 km NW of North Perry, Ohio | M3.5 | 113 km | 5 km |
| Jun 3, 2001 | 3 km N of Edgewood, Ohio | M3.4 | 125 km | 5 km |
| Jun 30, 2004 | 2 km WNW of Madison, Ohio | M3.3 | 129 km | 5 km |
| Jul 1, 2013 | 5 km NNW of Fairport Harbor, Ohio | M3.2 | 125 km | 5 km |
| Jan 9, 2008 | 6 km WNW of Mentor-on-the-Lake, Ohio | M3.1 | 133 km | 5 km |
| Mar 11, 2006 | 8 km NNW of Mentor-on-the-Lake, Ohio | M3.1 | 126 km | 5 km |
| Apr 25, 2010 | 2 km WNW of Madison, Ohio | M3.0 | 129 km | 5 km |
| Feb 23, 2011 | 18 km NE of Leamington, Canada | M3.0 | 119 km | 5 km |
| Feb 23, 1995 | 3 km W of Ashtabula, Ohio | M2.9 | 126 km | 5 km |
| Jan 4, 2022 | 3 km NW of Timberlake, Ohio | M2.8 | 137 km | 5 km |
| Sep 22, 1999 | 16 km NW of Mentor-on-the-Lake, Ohio | M2.8 | 121 km | 18 km |
| Apr 28, 2002 | Ohio | M2.7 | 119 km | 5 km |
| Mar 8, 2013 | 5 km NNW of Timberlake, Ohio | M2.7 | 134 km | 5 km |
| Jun 10, 2010 | 8 km NW of Mentor-on-the-Lake, Ohio | M2.6 | 129 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
2 tsunamis 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 | - | 78 km |
| 1952 | LAKE HURON, MI | Avalanche | 1.5 m | - | 83 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 2.9 in | Coldest |
| February | 22°F (-5°C) | 2.4 in | Driest |
| March | 32°F (-0°C) | 2.7 in | |
| April | 44°F (7°C) | 3.3 in | |
| May | 56°F (13°C) | 3.3 in | |
| June | 65°F (18°C) | 3.3 in | |
| July | 69°F (21°C) | 3.3 in | Warmest |
| August | 68°F (20°C) | 3.3 in | |
| September | 61°F (16°C) | 3.8 in | |
| October | 50°F (10°C) | 3.3 in | |
| November | 39°F (4°C) | 3.8 in | Wettest |
| December | 28°F (-2°C) | 3.5 in |
Delaware has a seasonal temperature swing of 48°F / from 21°F in January to 69°F in July. Total annual precipitation is 38.9 inches, with November being the wettest month (3.8") and February the driest (2.4").