Williamsfield, IL

Full City Profile · Illinois · Knox County County

4.0 /5.0
A Great
500 Population 407/sq mi density
$75,208 Median Income $36,686 per capita
$98,100 Home Value $151,873 Zillow
$625 Median Rent 11.0% income on rent
51°F Avg Temperature
A
Overall
4.0 / 5.0
Strong
A
Economy
4.4 / 5.0
$75,208 median income, 2.4% unemployment
A+
Affordability
5.0 / 5.0
$98,100 home value, $625/mo rent
C+
Education
2.6 / 5.0
20.1% bachelor's degree or higher
Williamsfield experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 24°F in January while summers reach 74°F in July. Annual precipitation totals 37.7 inches. The area receives 21.3 inches of snow annually.

Temperature

24°F Jan (-5°C) 74°F Jul (24°C)
Annual Average50.8°F
6% below US avg
January Average24°F (-5°C)
July Average74°F (24°C)

Geography

Elevation703 ft (214 m)
Area0.5 sq mi (1.3 km²)
Population Density407/sq mi
Coordinates40.9264°N, 90.0182°W
TimezoneAmerica/Chicago
CountyKnox County County
Nearest AirportGeneral Downing - Peoria International (PIA)
25 miles away

Precipitation & Snow

Annual Rainfall 37.7"
1% below US avg
Snowfall 21.3"
Wettest Month (May) 4.65"
Driest Month (Dec) 1.88"

Air Quality

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score57.2 / 100
Social Vulnerability49.8 / 100
Community Resilience66.0 / 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 Moderate
Winter Weather Relatively Low
Lightning Relatively Moderate
Ice Storm Relatively Moderate
Drought Relatively Moderate
Cold Wave Relatively Moderate
Landslide Relatively Low
Source: FEMA National Risk Index v1.20 (Dec 2025)

Earthquake History

4 earthquakes (M2.5+) within 150 km since 1990. Strongest: M4.2. Most recent: M2.6 on Mar 15, 2025.

Jun 28, 2004 12 km NW of Dayton, Illinois M4.2 111 km
Sep 2, 1999 8 km W of Amboy, Illinois M3.5 101 km
Jul 15, 2024 2 km WNW of Somonauk, Illinois M3.1 135 km
Mar 15, 2025 6 km W of Dwight, Illinois M2.6 129 km
Source: USGS (M2.5+, 1990-2025)

Tornado History

678 tornadoes (EF0+) within 100 km since 1950. Strongest: EF4. Total: 20 fatalities, 553 injuries.

Date Rating Distance Fatalities
Nov 17, 2013 EF4 51 km 3
Jul 13, 2004 EF4 60 km 0
May 13, 1995 EF4 66 km 0
Mar 29, 1981 EF4 84 km 0
May 5, 1977 EF4 99 km 0
Jun 29, 1976 EF4 27 km 0
Apr 4, 2023 EF3 71 km 0
Feb 28, 2017 EF3 100 km 2
Feb 28, 2017 EF3 55 km 0
Apr 20, 2004 EF3 72 km 8
May 10, 2003 EF3 58 km 0
Apr 19, 1996 EF3 88 km 0
May 13, 1995 EF3 57 km 0
May 9, 1995 EF3 45 km 0
Mar 13, 1990 EF3 78 km 0
Jun 21, 1981 EF3 93 km 1
Aug 15, 1978 EF3 74 km 0
Mar 4, 1976 EF3 48 km 0
Jul 23, 1975 EF3 42 km 2
Jul 23, 1975 EF3 49 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 92 km
2002 HSB 03 2 1,130 93 km
2000 DESTRUST A 756 93 km
2006 HSB 003 674 92 km
2004 HSB 009 608 93 km
Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 24°F (-5°C) 2.0 in Coldest
February 28°F (-2°C) 1.9 in
March 39°F (4°C) 2.5 in
April 51°F (11°C) 3.5 in
May 63°F (17°C) 4.7 in Wettest
June 72°F (22°C) 4.4 in
July 74°F (24°C) 4.3 in Warmest
August 72°F (22°C) 3.7 in
September 65°F (18°C) 4.0 in
October 53°F (12°C) 2.7 in
November 40°F (5°C) 2.4 in
December 29°F (-2°C) 1.9 in Driest

Williamsfield has a seasonal temperature swing of 51°F / from 24°F in January to 74°F in July. Total annual precipitation is 37.7 inches, with May being the wettest month (4.7") and December the driest (1.9").

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