Weather & Climate in Donovan, IL

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

Donovan experiences four distinct seasons with an average annual temperature of 51°F (10°C). Winters average 24°F in January while summers reach 74°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 38.4 inches. The area receives 17.1 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 674 feet.

Temperature

24°F Jan (-4°C) 74°F Jul (23°C)

Annual Average	50.7°F
	6% below US avg
January Average	24°F (-4°C)
July Average	74°F (23°C)
Sunny Days	275 days/yr

Geography

Elevation	674 ft (205 m)
Area	0.1 sq mi (0.3 km²)
Population Density	770/sq mi
Coordinates	40.8849°N, 87.6139°W
Timezone	America/Chicago
County	Newton County County
Nearest Airport	Vermilion Regional (DNV) 47 miles away

Precipitation & Snow

Annual Rainfall 38.4"

1% above US avg

Snowfall 17.1"

Wettest Month (Jun) 4.17"

Driest Month (Feb) 1.54"

Air Quality

AQI Median	43.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	11.7 / 100
Social Vulnerability	25.3 / 100
Community Resilience	52.7 / 100

Hazard Breakdown

Tornado	Relatively Low
Hurricane	Very Low
Earthquake	Very Low
Wildfire	Very Low
Flood	Very Low
Hail	Relatively Low
Strong Wind	Relatively Low
Heat Wave	Very Low
Winter Weather	Very Low
Lightning	Very Low
Ice Storm	Very Low
Drought	No Rating
Cold Wave	Relatively Low
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	125 km	10 km
Jun 17, 2021	Illinois-Indiana border region	M3.8	121 km	6 km
Feb 10, 2010	2 km NW of Lily Lake, Illinois	M3.8	141 km	10 km
Apr 14, 2000	4 km NW of Heritage Lake, Indiana	M3.6	145 km	5 km
Nov 4, 2013	1 km SSW of Lyons, Illinois	M3.2	103 km	1 km
Dec 17, 1990	Illinois-Indiana border region	M3.2	103 km	10 km
Jul 15, 2024	2 km WNW of Somonauk, Illinois	M3.1	125 km	10 km
Jun 10, 2013	4 km NNE of Virgil, Illinois	M2.6	144 km	5 km
Mar 15, 2025	6 km W of Dwight, Illinois	M2.6	78 km	5 km

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

Tornado History

635 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 71 fatalities, 1,364 injuries.

Date	Rating	Distance	Path	Fatalities
Apr 26, 1994	EF4	72 km	14.0 mi	3
Jun 29, 1979	EF4	87 km	5.4 mi	0
Jun 13, 1976	EF4	93 km	3.3 mi	2
Mar 20, 1976	EF4	69 km	16.7 mi	0
Apr 3, 1974	EF4	59 km	108.7 mi	18
Apr 21, 1967	EF4	89 km	15.0 mi	33
Apr 11, 1965	EF4	91 km	21.8 mi	0
Apr 17, 1963	EF4	52 km	57.3 mi	1
Jun 22, 2015	EF3	80 km	16.3 mi	0
Nov 17, 2013	EF3	86 km	29.8 mi	0
Nov 17, 2013	EF3	89 km	37.9 mi	0
Jun 5, 2010	EF3	97 km	8.6 mi	0
Jun 5, 2010	EF3	23 km	7.8 mi	0
Apr 19, 1996	EF3	90 km	2.0 mi	1
Mar 27, 1991	EF3	87 km	15.0 mi	0
Apr 27, 1984	EF3	95 km	9.0 mi	1
Apr 2, 1982	EF3	36 km	12.0 mi	0
Jun 25, 1978	EF3	74 km	27.4 mi	0
Mar 12, 1976	EF3	92 km	12.1 mi	0
Mar 12, 1976	EF3	15 km	38.5 mi	1

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

Tsunami History

1 tsunami recorded within 500 km. Highest wave on record: 3.0 m (10 ft).

Year	Location	Cause	Max Wave	Deaths	Distance
1954	MICHIGAN CITY, IN (LAKE MICHIGAN)	Avalanche	3.0 m	7	109 km

Source: NOAA/NCEI Historical Tsunami Database.

Wildfire History

12 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (1,741 acres, 2019).

Year	Name	Acres Burned	Distance
2019	UNNAMED	1,741	72 km
2019	UNNAMED	1,664	68 km
2000	UNNAMED	1,602	12 km
2021	NORTHEAST PRAIRIE UNIT 3	978	64 km
2024	NORTHEAST PRAIRIE 3 RX	938	66 km
1986	OGDEN DUNS	863	87 km
2021	UNNAMED	738	67 km
2021	MIDDLE GRANT CREEK	700	70 km
2019	UNNAMED	698	66 km
2021	21-INDU TOLLESTON DUNES EAST	594	87 km
2017	UNNAMED	549	71 km
2017	17 INDU COWLES DUNES	522	95 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	24°F (-4°C)	1.6 in	Coldest
February	27°F (-3°C)	1.5 in	Driest
March	38°F (3°C)	3.0 in
April	49°F (10°C)	3.9 in
May	61°F (16°C)	4.1 in
June	70°F (21°C)	4.2 in	Wettest
July	74°F (23°C)	4.1 in	Warmest
August	72°F (22°C)	3.6 in
September	65°F (18°C)	3.6 in
October	53°F (12°C)	2.9 in
November	41°F (5°C)	3.2 in
December	29°F (-2°C)	2.8 in

Donovan has a seasonal temperature swing of 50°F / from 24°F in January to 74°F in July. Total annual precipitation is 38.3 inches, with June being the wettest month (4.2") and February the driest (1.5").

View full profile of Donovan, IL →