Weather & Climate in Dahlgren, IL

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

Dahlgren enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 32°F in January while summers reach 78°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 47.1 inches (wetter than the 38-inch national average). The area receives 13.3 inches of snow annually. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 516 feet.

Temperature

32°F Jan (-0°C) 78°F Jul (25°C)

Annual Average	55.5°F
	3% above US avg
January Average	32°F (-0°C)
July Average	78°F (25°C)
Sunny Days	293 days/yr

Geography

Elevation	516 ft (157 m)
Area	0.4 sq mi (1.0 km²)
Population Density	619/sq mi
Coordinates	38.1981°N, 88.6847°W
Timezone	America/Chicago
County	Hamilton County County
Nearest Airport	Evansville Regional (EVV) 64 miles away

Precipitation & Snow

Annual Rainfall 47.1"

24% above US avg

Snowfall 13.3"

Wettest Month (May) 4.53"

Driest Month (Jan) 2.48"

Air Quality

AQI Median	43.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	30.8 / 100
Social Vulnerability	15.8 / 100
Community Resilience	75.1 / 100

Hazard Breakdown

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

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

Earthquake History

98 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.2.

Apr 18, 2008	7 km NNE of Bellmont, Illinois	M5.2	75 km	14 km
Sep 26, 1990	4 km SE of Chaffee, Missouri	M4.8	142 km	1 km
Apr 18, 2008	9 km NNE of Bellmont, Illinois	M4.7	77 km	15 km
Jun 18, 2002	6 km SW of Parkers Settlement, Indiana	M4.6	84 km	16 km
Feb 5, 1994	2 km WNW of Dongola, Illinois	M4.2	102 km	16 km
Jun 6, 2003	1 km NE of Bardwell, Kentucky	M4.0	149 km	3 km
Apr 21, 2008	7 km NNE of Bellmont, Illinois	M4.0	76 km	18 km
Dec 7, 2000	7 km W of Evansville, Indiana	M3.9	95 km	5 km
Nov 11, 1991	3 km W of Flat Rock, Illinois	M3.8	116 km	0 km
Sep 19, 2017	4 km N of Bellmont, Illinois	M3.8	72 km	12 km
Apr 25, 2008	8 km NNE of Bellmont, Illinois	M3.7	76 km	13 km
Jun 20, 2005	4 km WSW of Blandville, Kentucky	M3.6	145 km	19 km
Jan 2, 2006	3 km NNE of Eldorado, Illinois	M3.6	46 km	7 km
Nov 20, 2012	7 km N of Bellmont, Illinois	M3.6	74 km	19 km
May 1, 2016	5 km SE of New Grand Chain, Illinois	M3.5	113 km	16 km
May 30, 2015	4 km ENE of Geff, Illinois	M3.4	41 km	26 km
Jun 5, 2008	8 km WNW of Mount Carmel, Illinois	M3.4	79 km	16 km
Mar 2, 1990	9 km NW of Vernon, Illinois	M3.4	84 km	0 km
Sep 26, 1994	4 km ENE of Blandville, Kentucky	M3.4	139 km	13 km
May 1, 2008	8 km NNE of Bellmont, Illinois	M3.3	77 km	14 km

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

Tornado History

508 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 80 fatalities, 1,142 injuries.

Date	Rating	Distance	Path	Fatalities
Dec 18, 1957	EF5	51 km	5.4 mi	1
Nov 17, 2013	EF4	71 km	10.6 mi	2
Feb 29, 2012	EF4	56 km	26.1 mi	8
Jun 2, 1990	EF4	45 km	23.0 mi	0
Jun 2, 1990	EF4	20 km	106.0 mi	1
Jun 2, 1990	EF4	91 km	12.5 mi	0
Jan 7, 1989	EF4	85 km	19.0 mi	0
May 29, 1982	EF4	59 km	17.0 mi	10
Dec 18, 1957	EF4	89 km	28.3 mi	11
Dec 18, 1957	EF4	36 km	16.8 mi	1
Jul 9, 2024	EF3	77 km	5.8 mi	0
May 26, 2024	EF3	75 km	4.9 mi	0
Mar 31, 2023	EF3	95 km	40.9 mi	6
Feb 28, 2017	EF3	50 km	44.1 mi	1
Nov 17, 2013	EF3	86 km	14.1 mi	0
Mar 28, 2009	EF3	100 km	12.4 mi	0
Nov 6, 2005	EF3	89 km	41.3 mi	24
Apr 28, 2002	EF3	94 km	22.0 mi	0
Apr 21, 2002	EF3	17 km	31.5 mi	1
Apr 19, 1996	EF3	8 km	17.0 mi	0

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

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: UNNAMED (2,286 acres, 2019).

Year	Name	Acres Burned	Distance
2019	UNNAMED	2,286	88 km
2021	RED SHALE UNIT RX	2,123	68 km
2021	GAP VIEW RX	1,575	76 km
2022	DENNISON HOLLOW RX	1,573	65 km
2021	UNNAMED	1,510	78 km
2022	ONE HORSE GAP RX	1,502	79 km
2014	UNNAMED	1,493	63 km
2015	UNNAMED	1,447	66 km
2021	BEATTY BRANCH RX	1,396	86 km
2016	UNNAMED	1,299	79 km
2024	RED SHALE RX	1,259	69 km
2014	UNNAMED	1,216	79 km
2019	KINKAID RX	1,215	79 km
2013	UNNAMED	1,203	78 km
2022	KINKAID STATE FISH AND WILDLIFE AREA RX	1,115	79 km
2024	PINE HOLLOW RX	1,038	90 km
2021	ROCKY BRANCH RX	1,033	92 km
2021	STATE OF ILLINOIS TRACT RX	1,011	84 km
2015	UNNAMED	1,008	78 km
2024	CAVE HILL RX	999	63 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	32°F (-0°C)	2.5 in	Coldest, Driest
February	34°F (1°C)	2.7 in
March	45°F (7°C)	4.3 in
April	55°F (13°C)	4.3 in
May	65°F (18°C)	4.5 in	Wettest
June	74°F (23°C)	3.9 in
July	78°F (25°C)	3.6 in	Warmest
August	76°F (24°C)	3.2 in
September	69°F (21°C)	3.1 in
October	57°F (14°C)	3.0 in
November	45°F (7°C)	4.2 in
December	35°F (2°C)	3.5 in

Dahlgren has a seasonal temperature swing of 46°F / from 32°F in January to 78°F in July. Total annual precipitation is 42.6 inches, with May being the wettest month (4.5") and January the driest (2.5").

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