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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. The area gets 266 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 38.6 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) |
| Sunny Days | 266 days/yr |
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").