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Weather & Climate in Westport, ON
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Westport has a cool climate with an average annual temperature of 43°F (6°C). Winters average 14°F in January while summers reach 68°F in July. The area gets 269 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 36.9 inches. The area receives 10.6 inches of snow annually. The city sits at an elevation of 440 feet.
Temperature
14°F Jan (-10°C)
68°F Jul (20°C)
| Annual Average | 42.7°F |
| 21% below US avg | |
| January Average | 14°F (-10°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 269 days/yr |
Geography
| Elevation | 440 ft (134 m) |
| Area | 0.9 sq mi (2.2 km²) |
| Population Density | 749/sq mi |
| Coordinates | 44.6785°N, 76.3975°W |
| Timezone | America/Toronto |
Precipitation & Snow
Air Quality
Earthquake History
60 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.1.
| May 17, 2013 | 20 km NNE of Shawville, Canada | M5.1 | 120 km | 13 km |
| Apr 18, 1998 | 4 km N of Plantagenet, Canada | M4.1 | 148 km | 18 km |
| Feb 25, 2006 | 4 km NE of Thurso, Canada | M4.0 | 141 km | 11 km |
| Sep 18, 2011 | 1 km E of Thurso, Canada | M3.8 | 137 km | 5 km |
| May 17, 2013 | 20 km NNE of Shawville, Canada | M3.6 | 120 km | 11 km |
| Apr 23, 2023 | New York | M3.6 | 96 km | 9 km |
| Oct 20, 2013 | 34 km SSW of Petawawa, Canada | M3.6 | 133 km | 18 km |
| May 28, 2002 | 11 km WNW of Shawville, Canada | M3.4 | 107 km | 18 km |
| Jun 29, 2024 | 14 km W of Ellisburg, New York | M3.3 | 107 km | 5 km |
| Jun 11, 2008 | 6 km NNE of Buckingham, Canada | M3.3 | 133 km | 18 km |
| Jun 24, 2010 | 27 km NNE of Val-des-Monts, Canada | M3.2 | 149 km | 17 km |
| Jul 31, 1997 | 0 km WSW of Lyons Falls, New York | M3.2 | 143 km | 5 km |
| Sep 9, 2015 | 20 km NNE of Shawville, Canada | M3.2 | 121 km | 10 km |
| Jun 30, 2013 | 19 km NNE of Shawville, Canada | M3.1 | 119 km | 14 km |
| May 8, 2009 | 9 km E of Constance Bay, Canada | M3.1 | 97 km | 21 km |
| Feb 24, 2002 | 7 km WSW of Casselman, Canada | M3.1 | 118 km | 18 km |
| May 17, 2013 | 21 km NNE of Shawville, Canada | M3.1 | 121 km | 18 km |
| May 28, 2009 | 17 km N of Wakefield, Canada | M3.0 | 135 km | 4 km |
| Oct 13, 1997 | 18 km NW of Cranberry Lake, New York | M3.0 | 119 km | 4 km |
| Nov 7, 2002 | 13 km SSW of Belleville, Canada | M3.0 | 108 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 | 137 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 14°F (-10°C) | 3.0 in | Coldest |
| February | 16°F (-9°C) | 2.3 in | Driest |
| March | 27°F (-3°C) | 2.5 in | |
| April | 41°F (5°C) | 2.8 in | |
| May | 54°F (12°C) | 3.2 in | |
| June | 63°F (17°C) | 3.3 in | |
| July | 68°F (20°C) | 3.0 in | Warmest |
| August | 67°F (19°C) | 3.3 in | |
| September | 58°F (15°C) | 3.9 in | Wettest |
| October | 47°F (8°C) | 3.2 in | |
| November | 36°F (2°C) | 3.6 in | |
| December | 22°F (-6°C) | 2.8 in |
Westport has a seasonal temperature swing of 54°F / from 14°F in January to 68°F in July. Total annual precipitation is 36.9 inches, with September being the wettest month (3.9") and February the driest (2.3").