Weather & Climate in Hecker, IL

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

Hecker 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 474 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	474 ft (144 m)
Area	0.1 sq mi (0.2 km²)
Population Density	2,059/sq mi
Coordinates	38.3049°N, 89.9932°W
Timezone	America/Chicago
County	St. Clair County County
Nearest Airport	St Louis Lambert International (STL) 37 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

57 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	133 km	1 km
Feb 5, 1994	2 km WNW of Dongola, Illinois	M4.2	126 km	16 km
Jun 7, 2011	18 km NNW of Potosi, Missouri	M3.9	83 km	21 km
Jan 2, 2006	3 km NNE of Eldorado, Illinois	M3.6	147 km	7 km
Mar 2, 1990	9 km NW of Vernon, Illinois	M3.4	94 km	0 km
May 30, 2015	4 km ENE of Geff, Illinois	M3.4	144 km	26 km
Aug 27, 1993	5 km SSE of Olympian Village, Missouri	M3.3	46 km	22 km
Dec 27, 1992	2 km E of Pocahontas, Missouri	M3.2	95 km	10 km
May 2, 2003	10 km ENE of Thompsonville, Illinois	M3.2	122 km	0 km
Jan 29, 1993	7 km WNW of Brownstown, Illinois	M3.2	116 km	5 km
Apr 6, 1994	2 km NE of Tamaroa, Illinois	M3.2	70 km	15 km
Oct 24, 1990	5 km ENE of Woodlawn, Illinois	M3.2	89 km	1 km
Jul 1, 2017	9 km SSE of Mulberry Grove, Illinois	M3.1	90 km	17 km
Jan 23, 1991	3 km WSW of Logan, Illinois	M3.1	106 km	1 km
Mar 12, 2002	6 km S of Marble Hill, Missouri	M3.1	117 km	10 km
Jun 27, 2005	6 km E of Grand Tower, Illinois	M3.0	90 km	10 km
Mar 1, 2006	2 km N of Buncombe, Illinois	M3.0	126 km	6 km
Feb 28, 1994	5 km NW of Harrison, Illinois	M3.0	75 km	5 km
Sep 5, 2004	3 km WNW of Saint Peter, Illinois	M2.9	116 km	33 km
May 18, 2006	9 km SSE of De Soto, Missouri	M2.9	54 km	6 km

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

Tornado History

642 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 91 fatalities, 1,576 injuries.

Date	Rating	Distance	Path	Fatalities
Dec 18, 1957	EF5	70 km	5.4 mi	1
Feb 28, 2017	EF4	65 km	53.5 mi	1
Nov 17, 2013	EF4	49 km	10.6 mi	2
Apr 22, 2011	EF4	64 km	21.3 mi	0
Sep 22, 2006	EF4	71 km	27.5 mi	0
May 29, 1982	EF4	94 km	17.0 mi	10
Apr 3, 1981	EF4	48 km	11.9 mi	0
Jun 22, 1969	EF4	80 km	15.1 mi	4
Jan 24, 1967	EF4	64 km	25.0 mi	3
Feb 10, 1959	EF4	59 km	23.9 mi	21
Dec 18, 1957	EF4	80 km	16.8 mi	1
Dec 18, 1957	EF4	81 km	28.3 mi	11
Feb 24, 1956	EF4	82 km	77.6 mi	6
Dec 10, 2021	EF3	86 km	24.8 mi	1
Dec 10, 2021	EF3	51 km	4.2 mi	6
Oct 24, 2021	EF3	92 km	18.8 mi	0
Oct 24, 2021	EF3	76 km	16.7 mi	0
May 31, 2013	EF3	78 km	31.7 mi	0
May 31, 2013	EF3	57 km	10.6 mi	0
Dec 31, 2010	EF3	47 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: SMITH MILL HOLLOW (3,978 acres, 2022).

Year	Name	Acres Burned	Distance
2022	SMITH MILL HOLLOW	3,978	97 km
2004	CICERO CREEK	1,846	94 km
2000	UNNAMED	1,552	92 km
1999	UNNAMED	1,483	92 km
2019	KINKAID RX	1,215	73 km
2022	KINKAID STATE FISH AND WILDLIFE AREA RX	1,115	73 km
2024	RENAULT	1,085	92 km
2021	STATE OF ILLINOIS TRACT RX	1,011	63 km
2024	FLATWOODS RX	796	94 km
2005	UNNAMED	741	72 km
2018	UNNAMED	729	71 km
1995	UNNAMED	724	72 km
2020	UNNAMED	687	71 km
1989	UNNAMED	600	87 km
2024	PIGEON ROOST	583	94 km
2022	BLOWDOWN 16 RX	553	74 km
2000	UNNAMED	549	91 km
2019	PINE HILLS RX	542	99 km
1997	FLATWOODS	530	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	35°F (2°C)	2.4 in
March	45°F (7°C)	3.7 in
April	56°F (13°C)	3.7 in
May	65°F (18°C)	4.1 in	Wettest
June	74°F (23°C)	3.7 in
July	77°F (25°C)	3.9 in	Warmest
August	76°F (25°C)	3.3 in
September	69°F (21°C)	3.4 in
October	58°F (14°C)	2.9 in
November	46°F (8°C)	3.5 in
December	35°F (2°C)	3.2 in

Hecker has a seasonal temperature swing of 46°F / from 31°F in January to 77°F in July. Total annual precipitation is 39.9 inches, with May being the wettest month (4.1") and January the driest (2.1").

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