Weather & Climate in Alexander, IL

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Alexander experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 27°F in January while summers reach 75°F in July. The area gets 302 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 39.3 inches. The area receives 16.2 inches of snow annually, a moderate snowfall amount. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 658 feet.

Temperature

27°F Jan (-3°C) 75°F Jul (24°C)

Annual Average	52.7°F
	2% below US avg
January Average	27°F (-3°C)
July Average	75°F (24°C)
Sunny Days	302 days/yr

Geography

Elevation	658 ft (201 m)
Area	1.0 sq mi (2.5 km²)
Population Density	263/sq mi
Coordinates	39.7218°N, 90.0368°W
Timezone	America/Chicago
County	Morgan County County
Nearest Airport	St Louis Regional (ALN) 57 miles away

Precipitation & Snow

Annual Rainfall 39.3"

3% above US avg

Snowfall 16.2"

Wettest Month (May) 4.57"

Driest Month (Jan) 1.50"

Air Quality

AQI Median	43.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	71.1 / 100
Social Vulnerability	46.0 / 100
Community Resilience	78.2 / 100

Hazard Breakdown

Tornado	Relatively Low
Hurricane	Very Low
Earthquake	Relatively Low
Wildfire	Very Low
Flood	Relatively Low
Hail	Relatively Low
Strong Wind	Relatively High
Heat Wave	Relatively Moderate
Winter Weather	Relatively Low
Lightning	Relatively Low
Ice Storm	Relatively Low
Drought	Relatively High
Cold Wave	Relatively High
Landslide	Relatively Low

Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

10 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.4.

Mar 2, 1990	9 km NW of Vernon, Illinois	M3.4	122 km	0 km
Jan 29, 1993	7 km WNW of Brownstown, Illinois	M3.2	116 km	5 km
Jul 1, 2017	9 km SSE of Mulberry Grove, Illinois	M3.1	119 km	17 km
Sep 5, 2004	3 km WNW of Saint Peter, Illinois	M2.9	136 km	33 km
Apr 29, 2022	1 km SSW of Peerless Park, Missouri	M2.8	139 km	8 km
Mar 28, 2024	1 km NNE of Germantown, Illinois	M2.8	135 km	24 km
May 5, 2008	3 km SSE of Fenton, Missouri	M2.8	141 km	19 km
Sep 5, 2015	5 km SE of High Ridge, Missouri	M2.7	149 km	8 km
Sep 19, 2024	1 km S of Old Monroe, Missouri	M2.6	108 km	2 km
Jan 15, 1998	1 km SSE of Fenton, Missouri	M2.5	140 km	16 km

Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Tornado History

659 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 20 fatalities, 704 injuries.

Date	Rating	Distance	Path	Fatalities
May 13, 1995	EF4	76 km	7.0 mi	0
May 5, 1977	EF4	89 km	7.3 mi	0
Jun 14, 1957	EF4	29 km	4.3 mi	2
Apr 4, 2023	EF3	72 km	19.9 mi	0
Dec 1, 2018	EF3	65 km	12.5 mi	0
Apr 19, 2011	EF3	36 km	4.3 mi	0
Dec 31, 2010	EF3	33 km	3.6 mi	0
Aug 19, 2009	EF3	48 km	24.3 mi	0
May 10, 2003	EF3	89 km	17.5 mi	0
Jun 1, 1999	EF3	55 km	10.0 mi	1
Apr 19, 1996	EF3	89 km	9.4 mi	0
Apr 19, 1996	EF3	74 km	14.5 mi	0
May 13, 1995	EF3	78 km	25.0 mi	0
May 9, 1995	EF3	32 km	50.0 mi	0
May 1, 1983	EF3	51 km	4.0 mi	0
Jun 21, 1981	EF3	76 km	8.8 mi	1
Jul 26, 1978	EF3	24 km	8.9 mi	0
Aug 6, 1977	EF3	29 km	4.1 mi	0
Mar 20, 1976	EF3	46 km	8.8 mi	0
Jul 23, 1975	EF3	95 km	11.1 mi	0

Source: NOAA Storm Prediction Center (EF0+, 1950–2024, US only).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	27°F (-3°C)	1.5 in	Coldest, Driest
February	30°F (-1°C)	1.7 in
March	41°F (5°C)	3.2 in
April	53°F (12°C)	3.7 in
May	64°F (18°C)	4.6 in	Wettest
June	72°F (22°C)	4.0 in
July	75°F (24°C)	3.7 in	Warmest
August	74°F (23°C)	3.4 in
September	67°F (19°C)	3.5 in
October	55°F (13°C)	2.7 in
November	42°F (6°C)	3.2 in
December	30°F (-1°C)	2.6 in

Alexander has a seasonal temperature swing of 48°F / from 27°F in January to 75°F in July. Total annual precipitation is 37.7 inches, with May being the wettest month (4.6") and January the driest (1.5").

View full profile of Alexander, IL →