Cornwall, ON

Full City Profile · Ontario

2.7 /5.0

C+ Fair

47,845 Population 2,015/sq mi density

$60,000 Median Income $38,520 per capita

$280,000 Home Value

$880 Median Rent 22.1% income on rent

47°F Avg Temperature 265 sunny days/yr

C+

Overall

2.7 / 5.0

Fair overall score based on economy, affordability, safety and education

Economy

2.4 / 5.0

$60,000 median income, 12.4% unemployment

Affordability

4.0 / 5.0

$280,000 home value, $880/mo rent

C+

Safety

2.5 / 5.0

Education

1.7 / 5.0

8.3% bachelor's degree or higher

Cornwall experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 19°F in January while summers reach 71°F in July. The area gets 265 sunny days per year. Annual precipitation totals 47.6 inches. The area receives 63.3 inches of snow annually.

Temperature

19°F Jan (-7°C) 71°F Jul (22°C)

Annual Average	46.8°F
	13% below US avg
January Average	19°F (-7°C)
July Average	71°F (22°C)
Sunny Days	265 days/yr

Geography

Elevation	197 ft (60 m)
Area	23.8 sq mi (61.5 km²)
Population Density	2,015/sq mi
Coordinates	45.0181°N, 74.7282°W
Timezone	America/Toronto

Precipitation & Snow

Annual Rainfall 47.6"

25% above US avg

Snowfall 63.3"

Wettest Month (Jun) 3.74"

Driest Month (Mar) 2.40"

Air Quality

Earthquake History

159 earthquakes (M2.5+) within 150 km since 1990. Strongest: M5.4. Most recent: M2.5 on Jan 1, 2025.

Jun 23, 2010	29 km NNE of Val-des-Monts, Canada	M5.4	113 km
Apr 20, 2002	8 km NNW of Au Sable Forks, New York	M5.3	99 km
Mar 14, 1996	7 km WNW of Saint-Adolphe-d'Howard, Canada	M4.5	111 km
May 17, 1991	7 km WNW of Rigaud, Canada	M4.4	59 km
Oct 31, 1999	7 km SW of Morin-Heights, Canada	M4.2	98 km
May 24, 1997	6 km W of Saint-Adolphe-d'Howard, Canada	M4.2	109 km
Apr 18, 1998	4 km N of Plantagenet, Canada	M4.1	65 km
Aug 6, 2000	7 km SSW of La Minerve, Canada	M4.0	132 km
Nov 17, 1992	16 km ENE of Saint-André-Avellin, Canada	M4.0	84 km
Feb 25, 2006	4 km NE of Thurso, Canada	M4.0	77 km
Oct 10, 2012	7 km ESE of Verchères, Canada	M3.9	140 km
Jul 30, 1993	1 km NE of Salaberry-de-Valleyfield, Canada	M3.9	55 km
Oct 7, 1990	21 km WNW of La Minerve, Canada	M3.9	149 km
Mar 16, 2011	6 km ENE of Hawkesbury, Canada	M3.9	68 km
Sep 18, 2011	1 km E of Thurso, Canada	M3.8	76 km
Apr 20, 2000	7 km WSW of Newcomb, New York	M3.8	125 km
Jul 30, 1998	0 km ENE of Lac-Simon, Canada	M3.8	127 km
Sep 23, 1993	11 km SE of La Conception, Canada	M3.8	117 km
Oct 6, 2000	1 km WSW of Ormstown, Canada	M3.8	57 km
Nov 16, 1993	5 km SSE of Saint-Édouard, Canada	M3.8	99 km

Source: USGS (M2.5+, 1990–2025)

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	108 km

Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Wildfire History

1 wildfire (100+ acres) within 100 km. Largest: FLAT ROCK FIRE (658 ac, 2018).

Year	Name	Acres	Distance
2018	FLAT ROCK FIRE	658	87 km

Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	19°F (-7°C)	2.9 in
February	16°F (-9°C)	2.6 in	Coldest
March	27°F (-3°C)	2.4 in	Driest
April	42°F (5°C)	3.2 in
May	55°F (13°C)	3.3 in
June	64°F (18°C)	3.7 in	Wettest
July	71°F (22°C)	3.6 in	Warmest
August	68°F (20°C)	3.5 in
September	59°F (15°C)	3.7 in
October	47°F (8°C)	3.4 in
November	36°F (2°C)	3.5 in
December	21°F (-6°C)	3.0 in

Cornwall has a seasonal temperature swing of 55°F / from 16°F in February to 71°F in July. Total annual precipitation is 38.8 inches, with June being the wettest month (3.7") and March the driest (2.4").

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