Weather & Climate in Grayville, IL

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

Grayville 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 290 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 50.0 inches (wetter than the 38-inch national average). The area receives 11.8 inches of snow annually. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 425 feet.

Temperature

32°F Jan (0°C) 78°F Jul (26°C)

Annual Average	56.2°F
	4% above US avg
January Average	32°F (0°C)
July Average	78°F (26°C)
Sunny Days	290 days/yr

Geography

Elevation	425 ft (130 m)
Area	0.8 sq mi (2.2 km²)
Population Density	711/sq mi
Coordinates	38.2551°N, 87.9969°W
Timezone	America/Chicago
County	Wabash County County
Nearest Airport	Evansville Regional (EVV) 29 miles away

Precipitation & Snow

Annual Rainfall 50.0"

32% above US avg

Snowfall 11.8"

Wettest Month (May) 5.00"

Driest Month (Jan) 2.72"

Air Quality

AQI Median	43.0
Rating	Good

Natural Hazard Risk

Overall Risk	Very Low
Risk Score	24.8 / 100
Social Vulnerability	52.6 / 100
Community Resilience	56.2 / 100

Hazard Breakdown

Tornado	Relatively Low
Hurricane	Very Low
Earthquake	Relatively Low
Wildfire	Very Low
Flood	Very Low
Hail	Very 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 Low
Landslide	Very Low

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

Earthquake History

78 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	24 km	14 km
Apr 18, 2008	9 km NNE of Bellmont, Illinois	M4.7	25 km	15 km
Jun 18, 2002	6 km SW of Parkers Settlement, Indiana	M4.6	35 km	16 km
Feb 5, 1994	2 km WNW of Dongola, Illinois	M4.2	144 km	16 km
Apr 21, 2008	7 km NNE of Bellmont, Illinois	M4.0	24 km	18 km
Dec 7, 2000	7 km W of Evansville, Indiana	M3.9	45 km	5 km
Jan 24, 1990	6 km WNW of Alton, Indiana	M3.9	132 km	10 km
Nov 11, 1991	3 km W of Flat Rock, Illinois	M3.8	76 km	0 km
Sep 19, 2017	4 km N of Bellmont, Illinois	M3.8	20 km	12 km
Jan 27, 1990	6 km N of Alton, Indiana	M3.8	137 km	5 km
Apr 25, 2008	8 km NNE of Bellmont, Illinois	M3.7	24 km	13 km
Jan 2, 2006	3 km NNE of Eldorado, Illinois	M3.6	59 km	7 km
Nov 20, 2012	7 km N of Bellmont, Illinois	M3.6	24 km	19 km
May 1, 2016	5 km SE of New Grand Chain, Illinois	M3.5	145 km	16 km
Mar 2, 1990	9 km NW of Vernon, Illinois	M3.4	122 km	0 km
May 30, 2015	4 km ENE of Geff, Illinois	M3.4	39 km	26 km
Jun 5, 2008	8 km WNW of Mount Carmel, Illinois	M3.4	26 km	16 km
May 1, 2008	8 km NNE of Bellmont, Illinois	M3.3	25 km	14 km
May 13, 2025	7 km SSW of Lerna, Illinois	M3.3	126 km	10 km
Apr 6, 1994	2 km NE of Tamaroa, Illinois	M3.2	107 km	15 km

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

Tornado History

513 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF4. Total: 59 fatalities, 866 injuries.

Date	Rating	Distance	Path	Fatalities
Feb 29, 2012	EF4	85 km	26.1 mi	8
Jun 2, 1990	EF4	41 km	106.0 mi	1
Jun 2, 1990	EF4	54 km	23.0 mi	0
Jun 2, 1990	EF4	81 km	12.5 mi	0
Jun 2, 1990	EF4	51 km	13.0 mi	6
Jan 7, 1989	EF4	31 km	19.0 mi	0
Dec 18, 1957	EF4	95 km	16.8 mi	1
Jul 9, 2024	EF3	38 km	5.8 mi	0
Mar 31, 2023	EF3	72 km	40.9 mi	6
Feb 28, 2017	EF3	17 km	44.1 mi	1
Nov 17, 2013	EF3	62 km	14.1 mi	0
Mar 28, 2009	EF3	71 km	12.4 mi	0
Oct 18, 2007	EF3	90 km	7.0 mi	0
Nov 15, 2005	EF3	89 km	12.0 mi	0
Nov 6, 2005	EF3	51 km	41.3 mi	24
Nov 6, 2005	EF3	93 km	11.2 mi	0
Apr 28, 2002	EF3	98 km	22.0 mi	0
Apr 21, 2002	EF3	65 km	31.5 mi	1
Jan 3, 2000	EF3	93 km	7.0 mi	0
Apr 19, 1996	EF3	67 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: GAP VIEW RX (1,575 acres, 2021).

Year	Name	Acres Burned	Distance
2021	GAP VIEW RX	1,575	90 km
2022	DENNISON HOLLOW RX	1,573	77 km
2021	UNNAMED	1,510	100 km
2022	ONE HORSE GAP RX	1,502	92 km
2014	UNNAMED	1,493	74 km
2015	UNNAMED	1,447	78 km
2016	UNNAMED	1,299	92 km
2014	UNNAMED	1,216	92 km
2013	UNNAMED	1,203	92 km
2015	UNNAMED	1,008	92 km
2024	CAVE HILL RX	999	73 km
2017	UNNAMED	994	78 km
2021	ONE HORSE GAP RX	865	92 km
2019	HARRIS BRANCH RX	716	81 km
2010	ONE HORSE GAP	687	90 km
2013	UNNAMED	651	97 km
2021	UNNAMED	629	85 km
2024	WAR BLUFF RX	607	99 km
2022	HARTS CREEK RX	599	86 km
2024	GIBBONS CREEK RX	579	85 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	32°F (0°C)	2.7 in	Coldest, Driest
February	35°F (2°C)	2.9 in
March	45°F (7°C)	4.5 in
April	56°F (13°C)	4.5 in
May	65°F (19°C)	5.0 in	Wettest
June	74°F (23°C)	4.0 in
July	78°F (26°C)	3.9 in	Warmest
August	76°F (24°C)	3.4 in
September	69°F (21°C)	2.9 in
October	58°F (14°C)	3.2 in
November	46°F (8°C)	4.1 in
December	36°F (2°C)	3.6 in

Grayville has a seasonal temperature swing of 46°F / from 32°F in January to 78°F in July. Total annual precipitation is 44.6 inches, with May being the wettest month (5.0") and January the driest (2.7").

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