Weather & Climate in St. Libory, IL

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

St. Libory experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 31°F in January while summers reach 77°F in July. The area gets 293 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 45.6 inches. The area receives 10.6 inches of snow annually. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 422 feet.

Temperature

31°F Jan (-1°C) 77°F Jul (25°C)

Annual Average	55.1°F
	2% above US avg
January Average	31°F (-1°C)
July Average	77°F (25°C)
Sunny Days	293 days/yr

Geography

Elevation	422 ft (129 m)
Area	0.3 sq mi (0.9 km²)
Population Density	631/sq mi
Coordinates	38.3631°N, 89.7181°W
Timezone	America/Chicago
County	St. Clair County County
Nearest Airport	St Louis Regional (ALN) 40 miles away

Precipitation & Snow

Annual Rainfall 45.6"

20% above US avg

Snowfall 10.6"

Wettest Month (May) 4.13"

Driest Month (Jan) 2.09"

Air Quality

AQI Median	43.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively High
Risk Score	94.9 / 100
Social Vulnerability	37.9 / 100
Community Resilience	74.9 / 100

Hazard Breakdown

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

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

Earthquake History

61 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.

Sep 26, 1990	4 km SE of Chaffee, Missouri	M4.8	135 km	1 km
Feb 5, 1994	2 km WNW of Dongola, Illinois	M4.2	120 km	16 km
Jun 7, 2011	18 km NNW of Potosi, Missouri	M3.9	108 km	21 km
Jan 2, 2006	3 km NNE of Eldorado, Illinois	M3.6	128 km	7 km
May 1, 2016	5 km SE of New Grand Chain, Illinois	M3.5	143 km	16 km
May 30, 2015	4 km ENE of Geff, Illinois	M3.4	119 km	26 km
Mar 2, 1990	9 km NW of Vernon, Illinois	M3.4	72 km	0 km
Aug 27, 1993	5 km SSE of Olympian Village, Missouri	M3.3	70 km	22 km
Apr 6, 1994	2 km NE of Tamaroa, Illinois	M3.2	50 km	15 km
Jan 29, 1993	7 km WNW of Brownstown, Illinois	M3.2	96 km	5 km
Dec 27, 1992	2 km E of Pocahontas, Missouri	M3.2	96 km	10 km
May 2, 2003	10 km ENE of Thompsonville, Illinois	M3.2	102 km	0 km
Oct 24, 1990	5 km ENE of Woodlawn, Illinois	M3.2	65 km	1 km
Jul 1, 2017	9 km SSE of Mulberry Grove, Illinois	M3.1	69 km	17 km
Mar 12, 2002	6 km S of Marble Hill, Missouri	M3.1	126 km	10 km
Jan 23, 1991	3 km WSW of Logan, Illinois	M3.1	88 km	1 km
Jun 27, 2005	6 km E of Grand Tower, Illinois	M3.0	85 km	10 km
Mar 1, 2006	2 km N of Buncombe, Illinois	M3.0	116 km	6 km
Feb 28, 1994	5 km NW of Harrison, Illinois	M3.0	66 km	5 km
Sep 5, 2004	3 km WNW of Saint Peter, Illinois	M2.9	92 km	33 km

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

Tornado History

631 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 83 fatalities, 1,565 injuries.

Date	Rating	Distance	Path	Fatalities
Dec 18, 1957	EF5	52 km	5.4 mi	1
Feb 28, 2017	EF4	75 km	53.5 mi	1
Nov 17, 2013	EF4	24 km	10.6 mi	2
Apr 22, 2011	EF4	79 km	21.3 mi	0
Sep 22, 2006	EF4	77 km	27.5 mi	0
May 29, 1982	EF4	81 km	17.0 mi	10
Apr 3, 1981	EF4	54 km	11.9 mi	0
Jan 24, 1967	EF4	81 km	25.0 mi	3
Feb 10, 1959	EF4	79 km	23.9 mi	21
Dec 18, 1957	EF4	56 km	16.8 mi	1
Dec 18, 1957	EF4	77 km	28.3 mi	11
Dec 10, 2021	EF3	53 km	4.2 mi	6
Oct 24, 2021	EF3	95 km	16.7 mi	0
May 31, 2013	EF3	97 km	31.7 mi	0
May 31, 2013	EF3	61 km	10.6 mi	0
Dec 31, 2010	EF3	67 km	6.7 mi	1
Mar 11, 2006	EF3	60 km	5.1 mi	0
Mar 11, 2006	EF3	65 km	53.5 mi	2
Apr 21, 2002	EF3	86 km	31.5 mi	1
Apr 19, 1996	EF3	72 km	11.5 mi	0

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

Wildfire History

15 wildfires (100+ acres) recorded within 100 km. Largest: RED SHALE UNIT RX (2,123 acres, 2021).

Year	Name	Acres Burned	Distance
2021	RED SHALE UNIT RX	2,123	95 km
2024	RED SHALE RX	1,259	95 km
2019	KINKAID RX	1,215	66 km
2022	KINKAID STATE FISH AND WILDLIFE AREA RX	1,115	66 km
2021	STATE OF ILLINOIS TRACT RX	1,011	58 km
2021	MILL CREEK RX	898	93 km
2024	HAMPTON NORTH RX	807	93 km
2005	UNNAMED	741	94 km
2018	UNNAMED	729	65 km
1995	UNNAMED	724	94 km
2024	HERRIN FLATS RX	713	96 km
2020	UNNAMED	687	65 km
2024	HAMPTON RX	628	94 km
2022	BLOWDOWN 16 RX	553	68 km
2019	PINE HILLS RX	542	96 km

Source: NIFC/IRWIN Wildfire Records (100+ acres).

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	31°F (-1°C)	2.1 in	Coldest, Driest
February	34°F (1°C)	2.4 in
March	45°F (7°C)	3.6 in
April	55°F (13°C)	3.8 in
May	65°F (18°C)	4.1 in	Wettest
June	74°F (23°C)	3.7 in
July	77°F (25°C)	3.7 in	Warmest
August	76°F (24°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)	3.2 in
December	35°F (1°C)	3.0 in

St. Libory has a seasonal temperature swing of 46°F / from 31°F in January to 77°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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