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. 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 Average46.2°F
14% below US avg
January Average21°F (-6°C)
July Average69°F (21°C)

Geography

Elevation705 ft (215 m)
Area227.1 sq mi (588.2 km²)
Population Density11/sq mi
Coordinates42.9168°N, 81.4165°W
TimezoneAmerica/Toronto

Precipitation & Snow

Annual Rainfall 38.9"
2% above US avg
Snowfall 11.6"
Wettest Month (Nov) 3.82"
Driest Month (Feb) 2.44"

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").

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