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Weather & Climate in Port Stanley, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Port Stanley experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 22°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 39.0 inches. The area receives 11.2 inches of snow annually. The city sits at an elevation of 587 feet.
Temperature
22°F Jan (-6°C)
69°F Jul (21°C)
| Annual Average | 46.5°F |
| 14% below US avg | |
| January Average | 22°F (-6°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 265 days/yr |
Geography
| Elevation | 587 ft (179 m) |
| Area | 13.8 sq mi (35.6 km²) |
| Population Density | 156/sq mi |
| Coordinates | 42.6668°N, 81.2164°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
35 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 | 147 km | 5 km |
| Jun 10, 2019 | 1 km NW of Timberlake, Ohio | M4.0 | 112 km | 2 km |
| Jan 26, 2001 | 8 km NNW of Edgewood, Ohio | M3.9 | 88 km | 5 km |
| Jun 30, 2003 | 6 km NW of Perry, Ohio | M3.6 | 96 km | 5 km |
| Oct 16, 1993 | 8 km SSE of Madison, Ohio | M3.6 | 109 km | 5 km |
| Aug 28, 2023 | 7 km SE of Madison, Ohio | M3.6 | 106 km | 5 km |
| Jun 20, 2006 | 9 km WNW of North Perry, Ohio | M3.5 | 92 km | 5 km |
| Mar 15, 1992 | 15 km NW of North Perry, Ohio | M3.5 | 84 km | 5 km |
| Jun 3, 2001 | 3 km N of Edgewood, Ohio | M3.4 | 92 km | 5 km |
| Jan 26, 1991 | 1 km NNE of Mayfield Heights, Ohio | M3.4 | 127 km | 5 km |
| Jun 30, 2004 | 2 km WNW of Madison, Ohio | M3.3 | 99 km | 5 km |
| Jul 1, 2013 | 5 km NNW of Fairport Harbor, Ohio | M3.2 | 97 km | 5 km |
| Jan 9, 2008 | 6 km WNW of Mentor-on-the-Lake, Ohio | M3.1 | 107 km | 5 km |
| Mar 11, 2006 | 8 km NNW of Mentor-on-the-Lake, Ohio | M3.1 | 100 km | 5 km |
| Apr 25, 2010 | 2 km WNW of Madison, Ohio | M3.0 | 99 km | 5 km |
| Feb 23, 2011 | 18 km NE of Leamington, Canada | M3.0 | 115 km | 5 km |
| Feb 23, 1995 | 3 km W of Ashtabula, Ohio | M2.9 | 94 km | 5 km |
| Jan 4, 2022 | 3 km NW of Timberlake, Ohio | M2.8 | 111 km | 5 km |
| Sep 22, 1999 | 16 km NW of Mentor-on-the-Lake, Ohio | M2.8 | 96 km | 18 km |
| Mar 8, 2013 | 5 km NNW of Timberlake, Ohio | M2.7 | 108 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 | - | 46 km |
| 1952 | LAKE HURON, MI | Avalanche | 1.5 m | - | 108 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-6°C) | 2.7 in | Coldest |
| February | 23°F (-5°C) | 2.3 in | Driest |
| March | 32°F (0°C) | 2.8 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 | 69°F (21°C) | 3.3 in | Warmest |
| August | 68°F (20°C) | 3.5 in | |
| September | 61°F (16°C) | 3.7 in | |
| October | 50°F (10°C) | 3.2 in | |
| November | 40°F (4°C) | 3.9 in | Wettest |
| December | 29°F (-2°C) | 3.5 in |
Port Stanley has a seasonal temperature swing of 47°F / from 22°F in January to 69°F in July. Total annual precipitation is 39.0 inches, with November being the wettest month (3.9") and February the driest (2.3").