Lake St. Louis, MO

Full City Profile · Missouri

3.9 /5.0
B+ Good
17,538 Population 2,051/sq mi density
$123,427 Median Income $60,780 per capita
$375,300 Home Value $393,315 Zillow
$1,608 Median Rent 21.5% income on rent
56°F Avg Temperature
62 Violent Crime/100K 610 property/100K
B+
Overall
3.9 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.6 / 5.0
$123,427 median income, 4.5% unemployment
A+
Affordability
5.0 / 5.0
$375,300 home value, $1,608/mo rent
F
Safety
1.0 / 5.0
62 violent crimes/100K
A+
Education
5.0 / 5.0
49.5% bachelor's degree or higher
Lake St. Louis enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 32°F in January while summers reach 79°F in July. Annual precipitation totals 39.8 inches. The area receives 13.5 inches of snow annually.

Temperature

32°F Jan (-0°C) 79°F Jul (26°C)
Annual Average56.1°F
4% above US avg
January Average32°F (-0°C)
July Average79°F (26°C)

Geography

Elevation577 ft (176 m)
Area8.6 sq mi (22.1 km²)
Population Density2,051/sq mi
Coordinates38.7850°N, 90.7935°W
TimezoneAmerica/Chicago
Nearest AirportSt Louis Lambert International (STL)
23 miles away

Precipitation & Snow

Annual Rainfall 39.8"
5% above US avg
Snowfall 13.5"
Wettest Month (Apr) 4.58"
Driest Month (Feb) 1.98"

Air Quality

Earthquake History

25 earthquakes (M2.5+) within 150 km since 1990. Strongest: M3.9. Most recent: M2.6 on Sep 19, 2024.

Jun 7, 2011 18 km NNW of Potosi, Missouri M3.9 79 km
Mar 2, 1990 9 km NW of Vernon, Illinois M3.4 141 km
Aug 27, 1993 5 km SSE of Olympian Village, Missouri M3.3 83 km
Jul 1, 2017 9 km SSE of Mulberry Grove, Illinois M3.1 136 km
Jul 8, 2003 1 km N of Leasburg, Missouri M2.9 87 km
Feb 8, 2004 6 km SSW of Stoutsville, Missouri M2.9 123 km
May 18, 2006 9 km SSE of De Soto, Missouri M2.9 85 km
Apr 29, 2022 1 km SSW of Peerless Park, Missouri M2.8 38 km
Mar 28, 2024 1 km NNE of Germantown, Illinois M2.8 112 km
Jul 31, 1995 8 km SSW of Caledonia, Missouri M2.8 122 km
May 5, 2008 3 km SSE of Fenton, Missouri M2.8 47 km
Sep 13, 1997 3 km SSE of Darmstadt, Illinois M2.8 109 km
Jul 15, 1990 7 km SW of Potosi, Missouri M2.7 101 km
Nov 12, 1996 15 km SSE of Olympian Village, Missouri M2.7 94 km
Jul 22, 1998 12 km NE of Mine La Motte, Missouri M2.7 133 km
Sep 5, 2015 5 km SE of High Ridge, Missouri M2.7 48 km
Feb 3, 2014 18 km NW of Potosi, Missouri M2.6 81 km
Nov 25, 2013 8 km NE of Bonne Terre, Missouri M2.6 94 km
Mar 7, 2009 7 km S of Miramiguoa Park, Missouri M2.6 72 km
Jun 11, 1996 2 km SSE of Perryville, Missouri M2.6 145 km
Source: USGS (M2.5+, 1990-2025)

Tornado History

527 tornadoes (EF0+) within 100 km since 1950. Strongest: EF4. Total: 57 fatalities, 1,066 injuries.

Date Rating Distance Fatalities
Apr 22, 2011 EF4 27 km 0
Apr 3, 1981 EF4 58 km 0
Jun 22, 1969 EF4 97 km 2
Jan 24, 1967 EF4 24 km 3
Feb 10, 1959 EF4 33 km 21
Feb 24, 1956 EF4 39 km 6
Dec 10, 2021 EF3 23 km 1
Dec 10, 2021 EF3 64 km 6
May 31, 2013 EF3 56 km 0
May 31, 2013 EF3 12 km 0
Dec 31, 2010 EF3 43 km 1
Mar 13, 2006 EF3 58 km 0
Mar 13, 2006 EF3 46 km 0
Mar 11, 2006 EF3 84 km 0
Nov 15, 1988 EF3 8 km 0
Nov 15, 1988 EF3 71 km 0
Apr 29, 1984 EF3 21 km 0
May 1, 1983 EF3 73 km 0
May 1, 1983 EF3 58 km 0
Dec 2, 1982 EF3 99 km 2
Source: NOAA SPC (EF0+, 1950-2024)

Wildfire History

12 wildfires (100+ acres) within 100 km. Largest: SMITH MILL HOLLOW (3,978 ac, 2022).

Year Name Acres Distance
2022 SMITH MILL HOLLOW 3,978 94 km
2019 UNNAMED 2,688 94 km
2004 CICERO CREEK 1,846 86 km
2021 BERRYMAN BLOCK B AND C 1,728 97 km
2024 HARMON SPRING RX 1,330 92 km
2018 UNNAMED 1,285 92 km
2024 FLATWOODS RX 796 96 km
2022 NORTH KOFFER HOLLOW 783 95 km
1989 UNNAMED 600 95 km
2000 UNNAMED 549 90 km
1992 UNNAMED 533 96 km
1997 FLATWOODS 530 95 km
Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 32°F (-0°C) 2.4 in Coldest
February 36°F (2°C) 2.0 in Driest
March 46°F (8°C) 3.5 in
April 56°F (14°C) 4.6 in Wettest
May 66°F (19°C) 4.6 in
June 75°F (24°C) 4.3 in
July 79°F (26°C) 3.3 in Warmest
August 77°F (25°C) 3.4 in
September 69°F (20°C) 3.0 in
October 57°F (14°C) 3.1 in
November 45°F (7°C) 3.3 in
December 36°F (2°C) 2.3 in

Lake St. Louis has a seasonal temperature swing of 47°F / from 32°F in January to 79°F in July. Total annual precipitation is 39.8 inches, with April being the wettest month (4.6") and February the driest (2.0").

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