Weather & Climate in North Middlesex, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
North Middlesex experiences four distinct seasons with an average annual temperature of 46°F (8°C). Winters average 21°F in January while summers reach 70°F in July. Annual precipitation totals 38.6 inches. The area receives 11.9 inches of snow annually. The city sits at an elevation of 764 feet.
Temperature
21°F Jan (-6°C)
70°F Jul (21°C)
| Annual Average | 46.1°F |
| 15% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 70°F (21°C) |
Geography
| Elevation | 764 ft (233 m) |
| Area | 231.1 sq mi (598.7 km²) |
| Population Density | 27/sq mi |
| Coordinates | 43.1522°N, 81.6263°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
8 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.5.
| Mar 15, 1992 | 15 km NW of North Perry, Ohio | M3.5 | 142 km | 5 km |
| Jun 20, 2006 | 9 km WNW of North Perry, Ohio | M3.5 | 150 km | 5 km |
| Feb 23, 2011 | 18 km NE of Leamington, Canada | M3.0 | 129 km | 5 km |
| Sep 22, 1999 | 16 km NW of Mentor-on-the-Lake, Ohio | M2.8 | 148 km | 18 km |
| Apr 28, 2002 | Ohio | M2.7 | 146 km | 5 km |
| May 14, 2017 | 18 km ENE of Leamington, Canada | M2.6 | 130 km | 5 km |
| May 23, 2022 | 2 km NNW of Corunna, Canada | M2.5 | 72 km | 5 km |
| Feb 17, 2013 | 31 km E of Leamington, Canada | M2.5 | 135 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 | - | 109 km |
| 1952 | LAKE HURON, MI | Avalanche | 1.5 m | - | 63 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 3.2 in | Coldest |
| February | 22°F (-6°C) | 2.5 in | Driest |
| March | 32°F (-0°C) | 2.6 in | |
| April | 43°F (6°C) | 3.1 in | |
| May | 55°F (13°C) | 3.3 in | |
| June | 65°F (18°C) | 3.2 in | |
| July | 70°F (21°C) | 3.3 in | Warmest |
| August | 68°F (20°C) | 3.1 in | |
| September | 61°F (16°C) | 3.8 in | Wettest |
| October | 50°F (10°C) | 3.4 in | |
| November | 39°F (4°C) | 3.7 in | |
| December | 28°F (-2°C) | 3.6 in |
North Middlesex has a seasonal temperature swing of 48°F / from 21°F in January to 70°F in July. Total annual precipitation is 38.6 inches, with September being the wettest month (3.8") and February the driest (2.5").