Weather & Climate in Ohio, IL

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

Ohio experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 20°F in January while summers reach 72°F in July. The area gets 282 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 888 feet.

Temperature

20°F Jan (-7°C) 72°F Jul (22°C)

Annual Average	48.2°F
	11% below US avg
January Average	20°F (-7°C)
July Average	72°F (22°C)
Sunny Days	282 days/yr

Geography

Elevation	888 ft (271 m)
Area	0.6 sq mi (1.7 km²)
Population Density	909/sq mi
Coordinates	41.5550°N, 89.4603°W
Timezone	America/Chicago
County	Bureau County County
Nearest Airport	Illinois Valley Regional-Walter A Duncan Field (VYS) 21 miles away

Precipitation & Snow

Wettest Month (Jun) 4.49"

Driest Month (Feb) 1.26"

Air Quality

AQI Median	43.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	62.3 / 100
Social Vulnerability	41.7 / 100
Community Resilience	80.1 / 100

Hazard Breakdown

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

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

Earthquake History

8 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	48 km	10 km
Feb 10, 2010	2 km NW of Lily Lake, Illinois	M3.8	92 km	10 km
Sep 2, 1999	8 km W of Amboy, Illinois	M3.5	19 km	5 km
Nov 4, 2013	1 km SSW of Lyons, Illinois	M3.2	139 km	1 km
Jul 15, 2024	2 km WNW of Somonauk, Illinois	M3.1	63 km	10 km
Mar 25, 2015	3 km WNW of Lake in the Hills, Illinois	M2.9	115 km	6 km
Jun 10, 2013	4 km NNE of Virgil, Illinois	M2.6	93 km	5 km
Mar 15, 2025	6 km W of Dwight, Illinois	M2.6	96 km	5 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: 74 fatalities, 1,160 injuries.

Date	Rating	Distance	Path	Fatalities
Aug 28, 1990	EF5	93 km	16.4 mi	29
Apr 9, 2015	EF4	36 km	30.1 mi	2
Jul 13, 2004	EF4	85 km	9.6 mi	0
Mar 29, 1981	EF4	43 km	5.1 mi	0
Jun 29, 1976	EF4	87 km	4.9 mi	0
Apr 21, 1967	EF4	86 km	25.5 mi	24
Feb 28, 2017	EF3	72 km	17.8 mi	0
Feb 28, 2017	EF3	50 km	11.5 mi	2
Jun 22, 2015	EF3	94 km	16.3 mi	0
Jun 5, 2010	EF3	79 km	8.6 mi	0
Apr 20, 2004	EF3	37 km	15.8 mi	8
May 9, 1995	EF3	40 km	22.0 mi	0
Mar 13, 1990	EF3	68 km	15.5 mi	0
Apr 27, 1984	EF3	94 km	9.0 mi	1
Aug 5, 1979	EF3	53 km	5.7 mi	0
Jun 30, 1977	EF3	38 km	6.1 mi	0
Mar 12, 1976	EF3	93 km	22.6 mi	0
Mar 4, 1976	EF3	41 km	0.8 mi	0
Jun 20, 1974	EF3	82 km	10.6 mi	1
May 13, 1974	EF3	95 km	3.6 mi	0

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	20°F (-7°C)	1.4 in	Coldest
February	24°F (-4°C)	1.3 in	Driest
March	36°F (2°C)	2.6 in
April	49°F (9°C)	3.6 in
May	60°F (16°C)	4.2 in
June	69°F (21°C)	4.5 in	Wettest
July	72°F (22°C)	3.7 in	Warmest
August	71°F (22°C)	4.2 in
September	64°F (18°C)	3.7 in
October	52°F (11°C)	2.8 in
November	38°F (3°C)	2.6 in
December	25°F (-4°C)	2.1 in

Ohio has a seasonal temperature swing of 52°F / from 20°F in January to 72°F in July. Total annual precipitation is 36.8 inches, with June being the wettest month (4.5") and February the driest (1.3").

View full profile of Ohio, IL →