Weather & Climate in Clinton, IL

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

Clinton experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 26°F in January while summers reach 75°F in July. The area gets 275 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 39.8 inches. The area receives 19.3 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 729 feet.

Temperature

26°F Jan (-3°C) 75°F Jul (24°C)

Annual Average	52.3°F
	3% below US avg
January Average	26°F (-3°C)
July Average	75°F (24°C)
Sunny Days	275 days/yr

Geography

Elevation	729 ft (222 m)
Area	3.6 sq mi (9.2 km²)
Population Density	1,964/sq mi
Coordinates	40.1470°N, 88.9632°W
Timezone	America/Chicago
County	De Witt County County
Nearest Airport	Central Il Regional/Bloomington-Normal (BMI) 23 miles away

Precipitation & Snow

Annual Rainfall 39.8"

5% above US avg

Snowfall 19.3"

Wettest Month (May) 4.33"

Driest Month (Jan) 1.73"

Air Quality

AQI Median	43.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	29.3 / 100
Social Vulnerability	41.2 / 100
Community Resilience	95.2 / 100

Hazard Breakdown

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

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

Earthquake History

9 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.2.

Jun 28, 2004	12 km NW of Dayton, Illinois	M4.2	146 km	10 km
Jun 17, 2021	Illinois-Indiana border region	M3.8	147 km	6 km
Mar 2, 1990	9 km NW of Vernon, Illinois	M3.4	145 km	0 km
May 13, 2025	7 km SSW of Lerna, Illinois	M3.3	103 km	10 km
Jan 29, 1993	7 km WNW of Brownstown, Illinois	M3.2	124 km	5 km
Jul 1, 2017	9 km SSE of Mulberry Grove, Illinois	M3.1	146 km	17 km
Sep 5, 2004	3 km WNW of Saint Peter, Illinois	M2.9	140 km	33 km
Apr 24, 1990	5 km SW of Newton, Illinois	M2.9	148 km	18 km
Mar 15, 2025	6 km W of Dwight, Illinois	M2.6	112 km	5 km

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

Tornado History

812 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 25 fatalities, 862 injuries.

Date	Rating	Distance	Path	Fatalities
Nov 17, 2013	EF4	74 km	46.4 mi	3
Jul 13, 2004	EF4	79 km	9.6 mi	0
May 5, 1977	EF4	27 km	7.3 mi	0
Jun 29, 1976	EF4	99 km	4.9 mi	0
Mar 20, 1976	EF4	41 km	63.7 mi	0
Jun 14, 1957	EF4	77 km	4.3 mi	2
Dec 1, 2018	EF3	90 km	12.5 mi	0
Feb 28, 2017	EF3	92 km	17.8 mi	0
Nov 17, 2013	EF3	68 km	29.8 mi	0
Nov 17, 2013	EF3	64 km	18.7 mi	0
Dec 31, 2010	EF3	79 km	3.6 mi	0
Aug 19, 2009	EF3	55 km	24.3 mi	0
May 10, 2003	EF3	71 km	17.5 mi	0
Apr 19, 1996	EF3	41 km	14.5 mi	0
Apr 19, 1996	EF3	38 km	9.4 mi	0
Apr 19, 1996	EF3	86 km	2.0 mi	1
Apr 19, 1996	EF3	61 km	4.0 mi	0
May 13, 1995	EF3	88 km	25.0 mi	0
May 9, 1995	EF3	72 km	50.0 mi	0
Jul 26, 1978	EF3	80 km	8.9 mi	0

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	26°F (-3°C)	1.7 in	Coldest, Driest
February	29°F (-2°C)	1.8 in
March	40°F (5°C)	3.3 in
April	52°F (11°C)	4.0 in
May	63°F (17°C)	4.3 in	Wettest
June	72°F (22°C)	3.8 in
July	75°F (24°C)	4.1 in	Warmest
August	73°F (23°C)	3.8 in
September	66°F (19°C)	3.4 in
October	55°F (13°C)	2.9 in
November	42°F (5°C)	3.0 in
December	30°F (-1°C)	2.9 in

Clinton has a seasonal temperature swing of 49°F / from 26°F in January to 75°F in July. Total annual precipitation is 39.0 inches, with May being the wettest month (4.3") and January the driest (1.7").

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