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Arnold, MO

Full City Profile · Missouri

3.3 /5.0
B Good
20,884 Population 1,811/sq mi density
$75,194 Median Income $37,093 per capita
$209,700 Home Value $266,927 Zillow
$1,085 Median Rent 24.9% income on rent
58°F Avg Temperature 293 sunny days/yr
152 Violent Crime/100K 2,981 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.3 / 5.0
$75,194 median income, 2.7% unemployment
A+
Affordability
5.0 / 5.0
$209,700 home value, $1,085/mo rent
F
Safety
1.0 / 5.0
152 violent crimes/100K
C+
Education
2.9 / 5.0
24.0% bachelor's degree or higher
Arnold enjoys a temperate climate with an average annual temperature of 58°F (14°C). Winters average 38°F in January while summers reach 78°F in July. The area gets 293 sunny days per year. Annual precipitation totals 45.6 inches. The area receives 7.6 inches of snow annually. Air quality is rated Good with a median AQI of 41.

Temperature

38°F Jan (3°C) 78°F Jul (26°C)
Annual Average58.2°F
8% above US avg
January Average38°F (3°C)
July Average78°F (26°C)
Sunny Days293 days/yr

Geography

Elevation600 ft (183 m)
Area11.9 sq mi (30.9 km²)
Population Density1,811/sq mi
Coordinates38.4328°N, 90.3776°W
TimezoneAmerica/Chicago
Nearest AirportSt Louis Lambert International (STL)
22 miles away

Precipitation & Snow

Annual Rainfall 45.6"
20% above US avg
Snowfall 7.6"
Wettest Month (May) 4.13"
Driest Month (Jan) 2.05"

Air Quality

AQI Median41.0
RatingGood

Earthquake History

44 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 61 km
Mar 2, 1990 9 km NW of Vernon, Illinois M3.4 115 km
Aug 27, 1993 5 km SSE of Olympian Village, Missouri M3.3 38 km
Oct 24, 1990 5 km ENE of Woodlawn, Illinois M3.2 123 km
Jan 29, 1993 7 km WNW of Brownstown, Illinois M3.2 135 km
Dec 27, 1992 2 km E of Pocahontas, Missouri M3.2 123 km
Apr 6, 1994 2 km NE of Tamaroa, Illinois M3.2 106 km
Jul 1, 2017 9 km SSE of Mulberry Grove, Illinois M3.1 110 km
Mar 12, 2002 6 km S of Marble Hill, Missouri M3.1 137 km
Jan 23, 1991 3 km WSW of Logan, Illinois M3.1 143 km
Jun 27, 2005 6 km E of Grand Tower, Illinois M3.0 122 km
Feb 28, 1994 5 km NW of Harrison, Illinois M3.0 110 km
May 18, 2006 9 km SSE of De Soto, Missouri M2.9 44 km
Sep 5, 1995 3 km N of Woodlawn, Illinois M2.9 117 km
Sep 5, 2004 3 km WNW of Saint Peter, Illinois M2.9 139 km
Jul 8, 2003 1 km N of Leasburg, Missouri M2.9 88 km
Apr 29, 2022 1 km SSW of Peerless Park, Missouri M2.8 15 km
Mar 28, 2024 1 km NNE of Germantown, Illinois M2.8 75 km
Aug 26, 1992 5 km W of Frohna, Missouri M2.8 107 km
Sep 13, 1997 3 km SSE of Darmstadt, Illinois M2.8 60 km
Source: USGS (M2.5+, 1990–2025)

Tornado History

581 tornadoes (EF0+) within 100 km since 1950. Strongest: EF4. Total: 76 fatalities, 1,214 injuries.

Date Rating Distance Fatalities
Feb 28, 2017 EF4 85 km 1
Nov 17, 2013 EF4 81 km 2
Apr 22, 2011 EF4 35 km 0
Sep 22, 2006 EF4 97 km 0
Apr 3, 1981 EF4 39 km 0
Jun 22, 1969 EF4 80 km 4
Jun 22, 1969 EF4 83 km 2
Jan 24, 1967 EF4 31 km 3
Feb 10, 1959 EF4 22 km 21
Feb 24, 1956 EF4 47 km 6
Dec 10, 2021 EF3 50 km 1
Dec 10, 2021 EF3 46 km 6
Oct 24, 2021 EF3 81 km 0
Oct 24, 2021 EF3 99 km 0
May 31, 2013 EF3 43 km 0
May 31, 2013 EF3 46 km 0
Dec 31, 2010 EF3 10 km 1
Mar 13, 2006 EF3 94 km 0
Mar 11, 2006 EF3 35 km 0
Mar 11, 2006 EF3 76 km 2
Source: NOAA SPC (EF0+, 1950–2024)

Wildfire History

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

Year Name Acres Distance
2022 SMITH MILL HOLLOW 3,978 76 km
2021 COUNCIL BLUFF 3,035 94 km
2024 COUNCIL BLUFF WEST RX 2,846 94 km
2005 UNNAMED 2,751 89 km
2019 UNNAMED 2,688 79 km
2010 COUNCIL BLUFF LAKE 2,651 94 km
2006 UNNAMED 2,512 94 km
2021 BEAR PAW 2,080 89 km
2024 BEAR PAW RX 2,067 89 km
2004 CICERO CREEK 1,846 71 km
2021 BERRYMAN BLOCK B AND C 1,728 81 km
2015 UNNAMED 1,586 89 km
2010 DELBRIDGE SOUTH 1,574 89 km
2000 UNNAMED 1,552 90 km
1999 UNNAMED 1,483 90 km
2024 HARMON SPRING RX 1,330 78 km
2018 UNNAMED 1,285 78 km
2013 UNNAMED 1,196 89 km
2022 JOHNSON MOUNTAIN 1,155 93 km
2024 RENAULT 1,085 78 km
Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 38°F (3°C) 2.1 in Driest
February 35°F (2°C) 2.2 in
March 45°F (7°C) 3.7 in
April 55°F (13°C) 3.7 in
May 65°F (18°C) 4.1 in Wettest
June 73°F (23°C) 3.5 in
July 78°F (26°C) 3.5 in Warmest
August 76°F (25°C) 3.2 in
September 69°F (20°C) 3.3 in
October 57°F (14°C) 2.8 in
November 45°F (7°C) 3.6 in
December 35°F (1°C) 3.1 in Coldest

Arnold has a seasonal temperature swing of 44°F / from 35°F in December to 78°F in July. Total annual precipitation is 38.8 inches, with May being the wettest month (4.1") and January the driest (2.1").

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