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Ophiem, IL

Full City Profile · Illinois · Henry County County

3.5 /5.0
B+ Good
149 Population 126/sq mi density
$65,948 Median Income $23,629 per capita
$95,200 Home Value $154,251 Zillow
49°F Avg Temperature 275 sunny days/yr
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
B
Economy
3.1 / 5.0
$65,948 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$95,200 home value, /mo rent
C+
Safety
2.5 / 5.0
0 violent crimes/100K
B
Education
3.4 / 5.0
29.9% bachelor's degree or higher
Ophiem experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 21°F in January while summers reach 73°F in July. The area gets 275 sunny days per year. Annual precipitation totals 39.4 inches. Air quality is rated Good with a median AQI of 43.

Temperature

21°F Jan (-6°C) 73°F Jul (23°C)
Annual Average49.0°F
9% below US avg
January Average21°F (-6°C)
July Average73°F (23°C)
Sunny Days275 days/yr

Geography

Elevation696 ft (212 m)
Area1.2 sq mi (3.1 km²)
Population Density126/sq mi
Coordinates41.2538°N, 90.3827°W
TimezoneAmerica/Chicago
CountyHenry County County
Nearest AirportQuad Cities International (MLI)
15 miles away

Precipitation & Snow

Annual Rainfall 39.4"
4% above US avg
Wettest Month (Jul) 4.53"
Driest Month (Feb) 1.30"

Air Quality

AQI Median43.0
RatingGood

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score57.1 / 100
Social Vulnerability14.8 / 100
Community Resilience83.8 / 100

Hazard Breakdown

Tornado Relatively Moderate
Hurricane Very Low
Earthquake Very Low
Wildfire Very Low
Flood Relatively Low
Hail Relatively Moderate
Strong Wind Relatively High
Heat Wave Relatively Low
Winter Weather Relatively Moderate
Lightning Relatively Moderate
Ice Storm Relatively Moderate
Drought Relatively High
Cold Wave Relatively Low
Landslide Relatively Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

3 earthquakes (M2.5+) within 150 km since 1990. Strongest: M4.2. Most recent: M3.1 on Jul 15, 2024.

Jun 28, 2004 12 km NW of Dayton, Illinois M4.2 126 km
Sep 2, 1999 8 km W of Amboy, Illinois M3.5 95 km
Jul 15, 2024 2 km WNW of Somonauk, Illinois M3.1 146 km
Source: USGS (M2.5+, 1990–2025)

Tornado History

657 tornadoes (EF0+) within 100 km since 1950. Strongest: EF4. Total: 18 fatalities, 465 injuries.

Date Rating Distance Fatalities
Nov 17, 2013 EF4 98 km 3
May 13, 1995 EF4 99 km 0
Mar 29, 1981 EF4 60 km 0
Jun 29, 1976 EF4 73 km 0
Apr 11, 1965 EF4 80 km 1
Feb 28, 2017 EF3 94 km 0
Jun 1, 2007 EF3 68 km 0
Apr 20, 2004 EF3 92 km 8
May 9, 1995 EF3 55 km 0
May 9, 1995 EF3 49 km 0
Mar 13, 1990 EF3 39 km 0
May 8, 1988 EF3 64 km 0
Aug 15, 1978 EF3 33 km 0
Mar 4, 1976 EF3 68 km 0
Jul 23, 1975 EF3 78 km 2
Jul 23, 1975 EF3 78 km 0
Jun 13, 1975 EF3 65 km 0
Jun 20, 1974 EF3 81 km 1
Jun 14, 1974 EF3 28 km 0
May 13, 1974 EF3 45 km 0
Source: NOAA SPC (EF0+, 1950–2024)

Wildfire History

5 wildfires (100+ acres) within 100 km. Largest: UNIT 3 (1,206 ac, 1999).

Year Name Acres Distance
1999 UNIT 3 1,206 61 km
2002 HSB 03 2 1,130 62 km
2000 DESTRUST A 756 62 km
2006 HSB 003 674 62 km
2004 HSB 009 608 62 km
Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 21°F (-6°C) 1.5 in Coldest
February 26°F (-3°C) 1.3 in Driest
March 38°F (3°C) 2.8 in
April 50°F (10°C) 3.8 in
May 61°F (16°C) 4.1 in
June 71°F (22°C) 4.3 in
July 73°F (23°C) 4.5 in Warmest, Wettest
August 72°F (22°C) 4.1 in
September 64°F (18°C) 3.8 in
October 53°F (11°C) 2.9 in
November 39°F (4°C) 2.6 in
December 26°F (-3°C) 2.1 in

Ophiem has a seasonal temperature swing of 51°F / from 21°F in January to 73°F in July. Total annual precipitation is 37.7 inches, with July being the wettest month (4.5") and February the driest (1.3").

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