Weather & Climate in Coulterville, IL

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

Coulterville 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 551 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	551 ft (168 m)
Area	0.2 sq mi (0.6 km²)
Population Density	1,351/sq mi
Coordinates	38.1851°N, 89.6043°W
Timezone	America/Chicago
County	Perry County County
Nearest Airport	Farmington Regional (FAM) 51 miles away

Precipitation & Snow

Annual Rainfall 45.6"

20% above US avg

Snowfall 10.6"

Wettest Month (May) 4.29"

Driest Month (Jan) 2.17"

Air Quality

AQI Median	43.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	72.1 / 100
Social Vulnerability	64.1 / 100
Community Resilience	82.2 / 100

Hazard Breakdown

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

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

Earthquake History

86 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	115 km	1 km
Feb 5, 1994	2 km WNW of Dongola, Illinois	M4.2	98 km	16 km
Feb 21, 2012	4 km SSE of Bertrand, Missouri	M3.9	147 km	8 km
Jun 7, 2011	18 km NNW of Potosi, Missouri	M3.9	114 km	21 km
Jan 2, 2006	3 km NNE of Eldorado, Illinois	M3.6	111 km	7 km
Jun 20, 2005	4 km WSW of Blandville, Kentucky	M3.6	150 km	19 km
May 1, 2016	5 km SE of New Grand Chain, Illinois	M3.5	121 km	16 km
May 30, 2015	4 km ENE of Geff, Illinois	M3.4	113 km	26 km
Sep 26, 1994	4 km ENE of Blandville, Kentucky	M3.4	149 km	13 km
Mar 2, 1990	9 km NW of Vernon, Illinois	M3.4	83 km	0 km
Aug 27, 1993	5 km SSE of Olympian Village, Missouri	M3.3	74 km	22 km
Jan 29, 1993	7 km WNW of Brownstown, Illinois	M3.2	107 km	5 km
Apr 8, 1998	2 km NNW of Blandville, Kentucky	M3.2	147 km	13 km
Dec 27, 1992	2 km E of Pocahontas, Missouri	M3.2	76 km	10 km
Apr 6, 1994	2 km NE of Tamaroa, Illinois	M3.2	34 km	15 km
May 2, 2003	10 km ENE of Thompsonville, Illinois	M3.2	86 km	0 km
Oct 24, 1990	5 km ENE of Woodlawn, Illinois	M3.2	58 km	1 km
Jul 1, 2017	9 km SSE of Mulberry Grove, Illinois	M3.1	81 km	17 km
May 3, 2011	3 km WSW of Wickliffe, Kentucky	M3.1	143 km	0 km
Mar 12, 2002	6 km S of Marble Hill, Missouri	M3.1	109 km	10 km

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

Tornado History

620 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 94 fatalities, 1,642 injuries.

Date	Rating	Distance	Path	Fatalities
Dec 18, 1957	EF5	33 km	5.4 mi	1
Feb 28, 2017	EF4	62 km	53.5 mi	1
Nov 17, 2013	EF4	29 km	10.6 mi	2
Feb 29, 2012	EF4	100 km	26.1 mi	8
Apr 22, 2011	EF4	98 km	21.3 mi	0
Sep 22, 2006	EF4	60 km	27.5 mi	0
Jun 2, 1990	EF4	99 km	106.0 mi	1
May 29, 1982	EF4	60 km	17.0 mi	10
Apr 3, 1981	EF4	75 km	11.9 mi	0
Jun 22, 1969	EF4	97 km	15.1 mi	4
Jan 24, 1967	EF4	99 km	25.0 mi	3
Feb 10, 1959	EF4	95 km	23.9 mi	21
Dec 18, 1957	EF4	47 km	16.8 mi	1
Dec 18, 1957	EF4	55 km	28.3 mi	11
May 26, 2024	EF3	85 km	4.9 mi	0
Dec 10, 2021	EF3	75 km	4.2 mi	6
Oct 24, 2021	EF3	99 km	18.8 mi	0
Oct 24, 2021	EF3	89 km	16.7 mi	0
May 31, 2013	EF3	83 km	10.6 mi	0
Dec 31, 2010	EF3	83 km	6.7 mi	1

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

Wildfire History

19 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	73 km
2014	UNNAMED	1,627	90 km
2019	ATWOOD RIDGE RX	1,622	90 km
2024	RED SHALE RX	1,259	73 km
2017	UNNAMED	1,257	98 km
2021	OZARK HILL PRAIRIE RX	1,235	98 km
2019	KINKAID RX	1,215	44 km
2022	KINKAID STATE FISH AND WILDLIFE AREA RX	1,115	44 km
2021	STATE OF ILLINOIS TRACT RX	1,011	36 km
2021	MILL CREEK RX	898	71 km
2024	HAMPTON NORTH RX	807	71 km
2005	UNNAMED	741	91 km
2018	UNNAMED	729	43 km
1995	UNNAMED	724	91 km
2024	HERRIN FLATS RX	713	74 km
2020	UNNAMED	687	43 km
2024	HAMPTON RX	628	72 km
2022	BLOWDOWN 16 RX	553	47 km
2019	PINE HILLS RX	542	74 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	31°F (-1°C)	2.2 in	Coldest, Driest
February	34°F (1°C)	2.5 in
March	45°F (7°C)	3.9 in
April	55°F (13°C)	3.9 in
May	65°F (18°C)	4.3 in	Wettest
June	74°F (23°C)	3.8 in
July	77°F (25°C)	3.9 in	Warmest
August	76°F (24°C)	3.2 in
September	69°F (21°C)	3.2 in
October	58°F (14°C)	3.0 in
November	46°F (8°C)	3.7 in
December	35°F (2°C)	3.2 in

Coulterville has a seasonal temperature swing of 46°F / from 31°F in January to 77°F in July. Total annual precipitation is 40.8 inches, with May being the wettest month (4.3") and January the driest (2.2").

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