All Countries
Weather & Climate in Aylmer, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Aylmer experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 32°F in January while summers reach 70°F in July. The area gets 249 sunny days per year, above the national average. Annual precipitation totals 41.7 inches. The area receives 29.5 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 751 feet.
Temperature
32°F Jan (-0°C)
70°F Jul (21°C)
| Annual Average | 49.6°F |
| 8% below US avg | |
| January Average | 32°F (-0°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 249 days/yr |
Geography
| Elevation | 751 ft (229 m) |
| Area | 2.5 sq mi (6.4 km²) |
| Population Density | 3,130/sq mi |
| Coordinates | 42.7668°N, 80.9830°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
36 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 | 150 km | 5 km |
| Jun 10, 2019 | 1 km NW of Timberlake, Ohio | M4.0 | 127 km | 2 km |
| Jan 26, 2001 | 8 km NNW of Edgewood, Ohio | M3.9 | 93 km | 5 km |
| Jun 30, 2003 | 6 km NW of Perry, Ohio | M3.6 | 109 km | 5 km |
| Oct 16, 1993 | 8 km SSE of Madison, Ohio | M3.6 | 119 km | 5 km |
| Aug 28, 2023 | 7 km SE of Madison, Ohio | M3.6 | 115 km | 5 km |
| Jun 20, 2006 | 9 km WNW of North Perry, Ohio | M3.5 | 105 km | 5 km |
| Mar 15, 1992 | 15 km NW of North Perry, Ohio | M3.5 | 98 km | 5 km |
| Jun 3, 2001 | 3 km N of Edgewood, Ohio | M3.4 | 98 km | 5 km |
| Jan 26, 1991 | 1 km NNE of Mayfield Heights, Ohio | M3.4 | 142 km | 5 km |
| Jun 30, 2004 | 2 km WNW of Madison, Ohio | M3.3 | 110 km | 5 km |
| Jul 1, 2013 | 5 km NNW of Fairport Harbor, Ohio | M3.2 | 111 km | 5 km |
| Jan 9, 2008 | 6 km WNW of Mentor-on-the-Lake, Ohio | M3.1 | 122 km | 5 km |
| Mar 11, 2006 | 8 km NNW of Mentor-on-the-Lake, Ohio | M3.1 | 115 km | 5 km |
| Apr 25, 2010 | 2 km WNW of Madison, Ohio | M3.0 | 110 km | 5 km |
| Feb 23, 2011 | 18 km NE of Leamington, Canada | M3.0 | 137 km | 5 km |
| Feb 23, 1995 | 3 km W of Ashtabula, Ohio | M2.9 | 101 km | 5 km |
| Jan 4, 2022 | 3 km NW of Timberlake, Ohio | M2.8 | 127 km | 5 km |
| Sep 22, 1999 | 16 km NW of Mentor-on-the-Lake, Ohio | M2.8 | 112 km | 18 km |
| Mar 8, 2013 | 5 km NNW of Timberlake, Ohio | M2.7 | 124 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 | - | 53 km |
| 1952 | LAKE HURON, MI | Avalanche | 1.5 m | - | 121 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (-0°C) | 2.7 in | |
| February | 23°F (-5°C) | 2.2 in | Coldest, Driest |
| March | 33°F (0°C) | 2.9 in | |
| April | 44°F (7°C) | 3.4 in | |
| May | 56°F (13°C) | 3.3 in | |
| June | 65°F (18°C) | 3.6 in | |
| July | 70°F (21°C) | 3.4 in | Warmest |
| August | 68°F (20°C) | 3.5 in | |
| September | 61°F (16°C) | 3.7 in | |
| October | 50°F (10°C) | 3.3 in | |
| November | 40°F (4°C) | 3.9 in | Wettest |
| December | 29°F (-2°C) | 3.5 in |
Aylmer has a seasonal temperature swing of 47°F / from 23°F in February to 70°F in July. Total annual precipitation is 39.3 inches, with November being the wettest month (3.9") and February the driest (2.2").