St. Thomas, ON

Full City Profile · Ontario

2.7 /5.0

C+ Fair

42,840 Population 3,116/sq mi density

$75,000 Median Income $43,880 per capita

$448,000 Home Value

$940 Median Rent 19.1% income on rent

49°F Avg Temperature 265 sunny days/yr

C+

Overall

2.7 / 5.0

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

Economy

3.0 / 5.0

$75,000 median income, 11.2% unemployment

Affordability

3.3 / 5.0

$448,000 home value, $940/mo rent

C+

Safety

2.5 / 5.0

Education

1.8 / 5.0

10.1% bachelor's degree or higher

St. Thomas experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 26°F in January while summers reach 71°F in July. The area gets 265 sunny days per year. Annual precipitation totals 37.8 inches. The area receives 35.1 inches of snow annually.

Temperature

26°F Jan (-4°C) 71°F Jul (22°C)

Annual Average	48.9°F
	9% below US avg
January Average	26°F (-4°C)
July Average	71°F (22°C)
Sunny Days	265 days/yr

Geography

Elevation	764 ft (233 m)
Area	13.8 sq mi (35.6 km²)
Population Density	3,116/sq mi
Coordinates	42.7736°N, 81.1804°W
Timezone	America/Toronto

Precipitation & Snow

Annual Rainfall 37.8"

1% below US avg

Snowfall 35.1"

Wettest Month (Nov) 3.86"

Driest Month (Feb) 2.32"

Air Quality

Earthquake History

34 earthquakes (M2.5+) within 150 km since 1990. Strongest: M4.0. Most recent: M2.5 on May 12, 2025.

Jun 10, 2019	1 km NW of Timberlake, Ohio	M4.0	124 km
Jan 26, 2001	8 km NNW of Edgewood, Ohio	M3.9	98 km
Jun 30, 2003	6 km NW of Perry, Ohio	M3.6	108 km
Oct 16, 1993	8 km SSE of Madison, Ohio	M3.6	120 km
Aug 28, 2023	7 km SE of Madison, Ohio	M3.6	117 km
Jun 20, 2006	9 km WNW of North Perry, Ohio	M3.5	104 km
Mar 15, 1992	15 km NW of North Perry, Ohio	M3.5	96 km
Jun 3, 2001	3 km N of Edgewood, Ohio	M3.4	102 km
Jan 26, 1991	1 km NNE of Mayfield Heights, Ohio	M3.4	139 km
Jun 30, 2004	2 km WNW of Madison, Ohio	M3.3	111 km
Jul 1, 2013	5 km NNW of Fairport Harbor, Ohio	M3.2	109 km
Jan 9, 2008	6 km WNW of Mentor-on-the-Lake, Ohio	M3.1	119 km
Mar 11, 2006	8 km NNW of Mentor-on-the-Lake, Ohio	M3.1	112 km
Apr 25, 2010	2 km WNW of Madison, Ohio	M3.0	111 km
Feb 23, 2011	18 km NE of Leamington, Canada	M3.0	123 km
Feb 23, 1995	3 km W of Ashtabula, Ohio	M2.9	105 km
Jan 4, 2022	3 km NW of Timberlake, Ohio	M2.8	123 km
Sep 22, 1999	16 km NW of Mentor-on-the-Lake, Ohio	M2.8	108 km
Mar 8, 2013	5 km NNW of Timberlake, Ohio	M2.7	121 km
Apr 28, 2002	Ohio	M2.7	104 km

Source: USGS (M2.5+, 1990-2025)

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	-	56 km
1952	LAKE HURON, MI	Avalanche	1.5 m	-	106 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	26°F (-4°C)	2.7 in
February	23°F (-5°C)	2.3 in	Coldest, 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	71°F (22°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

St. Thomas has a seasonal temperature swing of 48°F / from 23°F in February to 71°F in July. Total annual precipitation is 39.0 inches, with November being the wettest month (3.9") and February the driest (2.3").

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