Weather & Climate in Rockwood, IL

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

Rockwood experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 31°F in January while summers reach 77°F in July. The area gets 305 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 46.2 inches (wetter than the 38-inch national average). The area receives 4.7 inches of snow annually. Air quality is rated Good with a median AQI of 43. The city sits at an elevation of 491 feet.

Temperature

31°F Jan (-0°C) 77°F Jul (25°C)

Annual Average	55.0°F
	2% above US avg
January Average	31°F (-0°C)
July Average	77°F (25°C)
Sunny Days	305 days/yr

Geography

Elevation	491 ft (150 m)
Area	0.1 sq mi (0.2 km²)
Population Density	71/sq mi
Coordinates	37.8371°N, 89.6918°W
Timezone	America/Chicago
County	Perry County County
Nearest Airport	Farmington Regional (FAM) 39 miles away

Precipitation & Snow

Annual Rainfall 46.2"

22% above US avg

Snowfall 4.7"

Wettest Month (May) 4.41"

Driest Month (Jan) 2.28"

Air Quality

AQI Median	43.0
Rating	Good

Natural Hazard Risk

Overall Risk	Relatively Low
Risk Score	46.2 / 100
Social Vulnerability	14.4 / 100
Community Resilience	79.4 / 100

Hazard Breakdown

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

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

Earthquake History

196 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.

Sep 26, 1990	4 km SE of Chaffee, Missouri	M4.8	77 km	1 km
May 4, 1991	2 km NNW of Risco, Missouri	M4.5	141 km	11 km
Feb 5, 1994	2 km WNW of Dongola, Illinois	M4.2	69 km	16 km
Jun 6, 2003	1 km NE of Bardwell, Kentucky	M4.0	123 km	3 km
Jun 7, 2011	18 km NNW of Potosi, Missouri	M3.9	109 km	21 km
Feb 21, 2012	4 km SSE of Bertrand, Missouri	M3.9	110 km	8 km
Mar 2, 2010	2 km ENE of East Prairie, Missouri	M3.7	120 km	8 km
Sep 22, 2011	6 km E of Grandin, Missouri	M3.6	147 km	11 km
Jun 20, 2005	4 km WSW of Blandville, Kentucky	M3.6	119 km	19 km
Jan 2, 2006	3 km NNE of Eldorado, Illinois	M3.6	112 km	7 km
Mar 15, 2017	9 km ESE of Wyatt, Missouri	M3.6	118 km	8 km
Jul 16, 2004	6 km SE of Wyatt, Missouri	M3.5	117 km	4 km
Jun 15, 2004	3 km S of Canalou, Missouri	M3.5	124 km	5 km
May 1, 2016	5 km SE of New Grand Chain, Illinois	M3.5	93 km	16 km
Mar 2, 1990	9 km NW of Vernon, Illinois	M3.4	122 km	0 km
Sep 26, 1994	4 km ENE of Blandville, Kentucky	M3.4	119 km	13 km
May 30, 2015	4 km ENE of Geff, Illinois	M3.4	136 km	26 km
Aug 27, 1993	5 km SSE of Olympian Village, Missouri	M3.3	71 km	22 km
Feb 6, 1993	6 km NNW of Catron, Missouri	M3.3	131 km	8 km
Sep 27, 2019	4 km WSW of Howardville, Missouri	M3.3	143 km	8 km

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

Tornado History

605 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF5. Total: 76 fatalities, 1,048 injuries.

Date	Rating	Distance	Path	Fatalities
Dec 18, 1957	EF5	47 km	5.4 mi	1
Feb 28, 2017	EF4	30 km	53.5 mi	1
Nov 17, 2013	EF4	68 km	10.6 mi	2
Feb 29, 2012	EF4	93 km	26.1 mi	8
Sep 22, 2006	EF4	21 km	27.5 mi	0
May 6, 2003	EF4	86 km	33.0 mi	2
May 29, 1982	EF4	50 km	17.0 mi	10
Jun 22, 1969	EF4	76 km	15.1 mi	4
Dec 18, 1957	EF4	73 km	16.8 mi	1
Dec 18, 1957	EF4	24 km	28.3 mi	11
May 26, 2024	EF3	66 km	4.9 mi	0
Oct 24, 2021	EF3	70 km	18.8 mi	0
Oct 24, 2021	EF3	65 km	16.7 mi	0
Nov 17, 2013	EF3	91 km	14.3 mi	0
Dec 31, 2010	EF3	100 km	6.7 mi	1
Mar 11, 2006	EF3	64 km	5.1 mi	0
Mar 11, 2006	EF3	27 km	53.5 mi	2
May 6, 2003	EF3	51 km	2.0 mi	0
Apr 28, 2002	EF3	61 km	19.3 mi	1
Apr 27, 2002	EF3	76 km	4.0 mi	1

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

Wildfire History

20 wildfires (100+ acres) recorded within 100 km. Largest: RED SHALE UNIT RX (2,123 acres, 2021).

Year	Name	Acres Burned	Distance
2021	RED SHALE UNIT RX	2,123	57 km
2014	UNNAMED	1,627	58 km
2019	ATWOOD RIDGE RX	1,622	58 km
2000	UNNAMED	1,552	85 km
1999	UNNAMED	1,483	85 km
2020	UNNAMED	1,334	75 km
2000	UNNAMED	1,260	99 km
2024	RED SHALE RX	1,259	57 km
2017	UNNAMED	1,257	64 km
2021	OZARK HILL PRAIRIE RX	1,235	64 km
2019	KINKAID RX	1,215	22 km
2022	KINKAID STATE FISH AND WILDLIFE AREA RX	1,115	22 km
2021	STATE OF ILLINOIS TRACT RX	1,011	14 km
2022	BEAN RIDGE RX	955	70 km
2021	MILL CREEK RX	898	46 km
2024	HAMPTON NORTH RX	807	56 km
2005	UNNAMED	741	73 km
2018	UNNAMED	729	20 km
1995	UNNAMED	724	73 km
2024	HERRIN FLATS RX	713	60 km

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

Monthly Weather

Month	Avg Temperature	Precipitation	Summary
January	31°F (-0°C)	2.3 in	Coldest, Driest
February	35°F (2°C)	2.6 in
March	45°F (7°C)	4.2 in
April	56°F (13°C)	3.9 in
May	65°F (18°C)	4.4 in	Wettest
June	74°F (23°C)	3.8 in
July	77°F (25°C)	4.1 in	Warmest
August	76°F (25°C)	3.5 in
September	69°F (21°C)	3.4 in
October	58°F (14°C)	2.9 in
November	46°F (8°C)	4.1 in
December	36°F (2°C)	3.5 in

Rockwood has a seasonal temperature swing of 46°F / from 31°F in January to 77°F in July. Total annual precipitation is 42.6 inches, with May being the wettest month (4.4") and January the driest (2.3").

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