Weather & Climate in Kaskaskia, IL

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

Kaskaskia enjoys a temperate climate with an average annual temperature of 56°F (14°C). Winters average 32°F in January while summers reach 79°F in July. The area gets 305 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 42.8 inches. The area receives 4.3 inches of snow annually. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 375 feet.

Temperature

32°F Jan (0°C) 79°F Jul (26°C)

Annual Average	56.4°F
	4% above US avg
January Average	32°F (0°C)
July Average	79°F (26°C)
Sunny Days	305 days/yr

Geography

Elevation	375 ft (114 m)
Area	0.1 sq mi (0.3 km²)
Population Density	309/sq mi
Coordinates	37.9213°N, 89.9163°W
Timezone	America/Chicago
County	Perry County County
Nearest Airport	Farmington Regional (FAM) 28 miles away

Precipitation & Snow

Annual Rainfall 42.8"

13% above US avg

Snowfall 4.3"

Wettest Month (May) 4.29"

Driest Month (Jan) 2.20"

Air Quality

AQI Median	43.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	46.2 / 100
Social Vulnerability	14.4 / 100
Community Resilience	79.4 / 100

Hazard Breakdown

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

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

Earthquake History

144 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	90 km	1 km
May 4, 1991	2 km NNW of Risco, Missouri	M4.5	150 km	11 km
Feb 5, 1994	2 km WNW of Dongola, Illinois	M4.2	89 km	16 km
Jun 6, 2003	1 km NE of Bardwell, Kentucky	M4.0	142 km	3 km
Feb 21, 2012	4 km SSE of Bertrand, Missouri	M3.9	124 km	8 km
Jun 7, 2011	18 km NNW of Potosi, Missouri	M3.9	88 km	21 km
Mar 2, 2010	2 km ENE of East Prairie, Missouri	M3.7	135 km	8 km
Sep 22, 2011	6 km E of Grandin, Missouri	M3.6	143 km	11 km
Jun 20, 2005	4 km WSW of Blandville, Kentucky	M3.6	137 km	19 km
Jan 2, 2006	3 km NNE of Eldorado, Illinois	M3.6	132 km	7 km
Mar 15, 2017	9 km ESE of Wyatt, Missouri	M3.6	135 km	8 km
May 1, 2016	5 km SE of New Grand Chain, Illinois	M3.5	114 km	16 km
Jun 15, 2004	3 km S of Canalou, Missouri	M3.5	135 km	5 km
Jul 16, 2004	6 km SE of Wyatt, Missouri	M3.5	135 km	4 km
Sep 26, 1994	4 km ENE of Blandville, Kentucky	M3.4	138 km	13 km
May 30, 2015	4 km ENE of Geff, Illinois	M3.4	149 km	26 km
Mar 2, 1990	9 km NW of Vernon, Illinois	M3.4	122 km	0 km
Aug 27, 1993	5 km SSE of Olympian Village, Missouri	M3.3	49 km	22 km
Feb 6, 1993	6 km NNW of Catron, Missouri	M3.3	141 km	8 km
May 16, 2017	9 km ESE of Wyatt, Missouri	M3.3	136 km	9 km

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

Tornado History

610 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 98 fatalities, 1,296 injuries.

Date	Rating	Distance	Path	Fatalities
Dec 18, 1957	EF5	61 km	5.4 mi	1
Feb 28, 2017	EF4	23 km	53.5 mi	1
Nov 17, 2013	EF4	69 km	10.6 mi	2
Sep 22, 2006	EF4	28 km	27.5 mi	0
May 29, 1982	EF4	70 km	17.0 mi	10
Apr 3, 1981	EF4	91 km	11.9 mi	0
Jun 22, 1969	EF4	60 km	15.1 mi	4
Feb 10, 1959	EF4	90 km	23.9 mi	21
Dec 18, 1957	EF4	83 km	16.8 mi	1
Dec 18, 1957	EF4	46 km	28.3 mi	11
May 26, 2024	EF3	88 km	4.9 mi	0
Dec 10, 2021	EF3	94 km	4.2 mi	6
Oct 24, 2021	EF3	59 km	18.8 mi	0
Oct 24, 2021	EF3	50 km	16.7 mi	0
May 31, 2013	EF3	100 km	10.6 mi	0
Dec 31, 2010	EF3	80 km	6.7 mi	1
Mar 11, 2006	EF3	42 km	5.1 mi	0
Mar 11, 2006	EF3	13 km	53.5 mi	2
May 6, 2003	EF3	64 km	2.0 mi	0
Apr 28, 2002	EF3	80 km	19.3 mi	1

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

Wildfire History

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

Year	Name	Acres Burned	Distance
2022	SMITH MILL HOLLOW	3,978	96 km
2021	COUNCIL BLUFF	3,035	93 km
2024	COUNCIL BLUFF WEST RX	2,846	93 km
2005	UNNAMED	2,751	94 km
2010	COUNCIL BLUFF LAKE	2,651	93 km
2006	UNNAMED	2,512	93 km
2021	RED SHALE UNIT RX	2,123	78 km
2021	BEAR PAW	2,080	98 km
2024	BEAR PAW RX	2,067	98 km
2004	CICERO CREEK	1,846	97 km
2014	UNNAMED	1,627	77 km
2019	ATWOOD RIDGE RX	1,622	77 km
2015	UNNAMED	1,586	93 km
2010	DELBRIDGE SOUTH	1,574	93 km
2000	UNNAMED	1,552	70 km
1999	UNNAMED	1,483	70 km
2020	UNNAMED	1,334	93 km
2000	UNNAMED	1,260	84 km
2024	RED SHALE RX	1,259	78 km
2017	UNNAMED	1,257	83 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	32°F (0°C)	2.2 in	Coldest, Driest
February	35°F (2°C)	2.5 in
March	45°F (7°C)	4.1 in
April	56°F (13°C)	3.8 in
May	65°F (19°C)	4.3 in	Wettest
June	74°F (23°C)	3.7 in
July	79°F (26°C)	4.0 in	Warmest
August	76°F (25°C)	3.5 in
September	70°F (21°C)	3.5 in
October	58°F (15°C)	2.9 in
November	46°F (8°C)	4.0 in
December	36°F (2°C)	3.5 in

Kaskaskia has a seasonal temperature swing of 47°F / from 32°F in January to 79°F in July. Total annual precipitation is 41.8 inches, with May being the wettest month (4.3") and January the driest (2.2").

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