All Countries
Weather & Climate in Winchester, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Winchester has a cool climate with an average annual temperature of 43°F (6°C). Winters average 13°F in January while summers reach 69°F in July. The area gets 268 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 37.7 inches. The area receives 14.1 inches of snow annually. The city sits at an elevation of 240 feet.
Temperature
13°F Jan (-11°C)
69°F Jul (21°C)
| Annual Average | 42.7°F |
| 21% below US avg | |
| January Average | 13°F (-11°C) |
| July Average | 69°F (21°C) |
| Sunny Days | 268 days/yr |
Geography
| Elevation | 240 ft (73 m) |
| Area | 194.0 sq mi (502.4 km²) |
| Population Density | 12/sq mi |
| Coordinates | 45.0834°N, 75.3493°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
165 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.4.
| Jun 23, 2010 | 29 km NNE of Val-des-Monts, Canada | M5.4 | 90 km | 19 km |
| Apr 20, 2002 | 8 km NNW of Au Sable Forks, New York | M5.3 | 145 km | 5 km |
| May 17, 2013 | 20 km NNE of Shawville, Canada | M5.1 | 108 km | 13 km |
| Mar 14, 1996 | 7 km WNW of Saint-Adolphe-d'Howard, Canada | M4.5 | 124 km | 18 km |
| May 17, 1991 | 7 km WNW of Rigaud, Canada | M4.4 | 88 km | 18 km |
| Oct 31, 1999 | 7 km SW of Morin-Heights, Canada | M4.2 | 117 km | 18 km |
| May 24, 1997 | 6 km W of Saint-Adolphe-d'Howard, Canada | M4.2 | 123 km | 10 km |
| Apr 18, 1998 | 4 km N of Plantagenet, Canada | M4.1 | 61 km | 18 km |
| Nov 17, 1992 | 16 km ENE of Saint-André-Avellin, Canada | M4.0 | 85 km | 18 km |
| Aug 6, 2000 | 7 km SSW of La Minerve, Canada | M4.0 | 127 km | 18 km |
| Feb 25, 2006 | 4 km NE of Thurso, Canada | M4.0 | 62 km | 11 km |
| Jul 30, 1993 | 1 km NE of Salaberry-de-Valleyfield, Canada | M3.9 | 98 km | 8 km |
| Oct 7, 1990 | 21 km WNW of La Minerve, Canada | M3.9 | 138 km | 18 km |
| Mar 16, 2011 | 6 km ENE of Hawkesbury, Canada | M3.9 | 87 km | 10 km |
| Sep 18, 2011 | 1 km E of Thurso, Canada | M3.8 | 58 km | 5 km |
| Jul 30, 1998 | 0 km ENE of Lac-Simon, Canada | M3.8 | 129 km | 10 km |
| Oct 6, 2000 | 1 km WSW of Ormstown, Canada | M3.8 | 105 km | 18 km |
| Nov 16, 1993 | 5 km SSE of Saint-Édouard, Canada | M3.8 | 146 km | 17 km |
| Sep 23, 1993 | 11 km SE of La Conception, Canada | M3.8 | 124 km | 18 km |
| Jul 5, 1991 | 7 km WSW of Sainte-Martine, Canada | M3.8 | 115 km | 18 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 15.0 m (49 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1908 | NOTRE DAME DE LA SALETTE | Meteorological | 15.0 m | 33 | 79 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 13°F (-11°C) | 2.7 in | Coldest |
| February | 15°F (-9°C) | 2.5 in | |
| March | 27°F (-3°C) | 2.4 in | Driest |
| April | 42°F (5°C) | 3.2 in | |
| May | 55°F (13°C) | 3.2 in | |
| June | 64°F (18°C) | 3.3 in | |
| July | 69°F (21°C) | 3.6 in | Warmest, Wettest |
| August | 67°F (19°C) | 3.5 in | |
| September | 58°F (15°C) | 3.4 in | |
| October | 47°F (8°C) | 3.3 in | |
| November | 35°F (2°C) | 3.5 in | |
| December | 20°F (-7°C) | 3.1 in |
Winchester has a seasonal temperature swing of 56°F / from 13°F in January to 69°F in July. Total annual precipitation is 37.7 inches, with July being the wettest month (3.6") and March the driest (2.4").