Potomac, IL

Full City Profile · Illinois · Vermilion County County

2.9 /5.0
C+ Fair
612 Population 1,249/sq mi density
$52,404 Median Income $34,756 per capita
$79,600 Home Value $141,294 Zillow
$742 Median Rent 22.0% income on rent
52°F Avg Temperature
303 Violent Crime/100K 152 property/100K
C+
Overall
2.9 / 5.0
Fair overall score based on economy, affordability, safety and education
B+
Economy
3.8 / 5.0
$52,404 median income, 3.9% unemployment
A+
Affordability
5.0 / 5.0
$79,600 home value, $742/mo rent
F
Safety
1.0 / 5.0
303 violent crimes/100K
D
Education
1.9 / 5.0
10.8% bachelor's degree or higher
Potomac experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 26°F in January while summers reach 75°F in July. Annual precipitation totals 40.9 inches. The area receives 20.3 inches of snow annually.

Temperature

26°F Jan (-3°C) 75°F Jul (24°C)
Annual Average52.3°F
3% below US avg
January Average26°F (-3°C)
July Average75°F (24°C)

Geography

Elevation682 ft (208 m)
Area0.5 sq mi (1.3 km²)
Population Density1,249/sq mi
Coordinates40.3067°N, 87.7976°W
TimezoneAmerica/Chicago
CountyVermilion County County
Nearest AirportVermilion Regional (DNV)
13 miles away

Precipitation & Snow

Annual Rainfall 40.9"
8% above US avg
Snowfall 20.3"
Wettest Month (Jun) 4.89"
Driest Month (Feb) 1.96"

Air Quality

Natural Hazard Risk

Overall RiskRelatively Low
Risk Score78.8 / 100
Social Vulnerability70.2 / 100
Community Resilience87.0 / 100

Hazard Breakdown

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

Earthquake History

7 earthquakes (M2.5+) within 150 km since 1990. Strongest: M3.8. Most recent: M3.3 on May 13, 2025.

Jun 17, 2021 Illinois-Indiana border region M3.8 69 km
Dec 20, 1990 5 km S of Stilesville, Indiana M3.7 128 km
Apr 14, 2000 4 km NW of Heritage Lake, Indiana M3.6 108 km
May 13, 2025 7 km SSW of Lerna, Illinois M3.3 115 km
Dec 17, 1990 Illinois-Indiana border region M3.2 69 km
Dec 16, 1996 3 km NNE of Terre Haute, Indiana M3.1 96 km
Mar 15, 2025 6 km W of Dwight, Illinois M2.6 105 km
Source: USGS (M2.5+, 1990-2025)

Tornado History

645 tornadoes (EF0+) within 100 km since 1950. Strongest: EF4. Total: 61 fatalities, 836 injuries.

Date Rating Distance Fatalities
Apr 26, 1994 EF4 74 km 3
Mar 20, 1976 EF4 70 km 0
Apr 3, 1974 EF4 61 km 18
Apr 11, 1965 EF4 82 km 0
Apr 11, 1965 EF4 85 km 28
Nov 17, 2013 EF3 69 km 0
Nov 17, 2013 EF3 32 km 0
Nov 17, 2013 EF3 82 km 0
Jun 5, 2010 EF3 84 km 0
Apr 19, 1996 EF3 25 km 1
Apr 19, 1996 EF3 47 km 0
Apr 2, 1982 EF3 84 km 0
Jun 2, 1980 EF3 67 km 1
Jun 25, 1978 EF3 71 km 0
Mar 12, 1976 EF3 78 km 1
Aug 10, 1974 EF3 90 km 0
Apr 3, 1974 EF3 52 km 1
Apr 3, 1974 EF3 74 km 0
Apr 3, 1974 EF3 27 km 0
Apr 3, 1974 EF3 46 km 0
Source: NOAA SPC (EF0+, 1950-2024)

Wildfire History

1 wildfire (100+ acres) within 100 km. Largest: UNNAMED (1,602 ac, 2000).

Year Name Acres Distance
2000 UNNAMED 1,602 78 km
Source: NIFC/IRWIN (100+ acres)

Monthly Weather

Month Avg Temperature Precipitation Summary
January 26°F (-3°C) 2.1 in Coldest
February 30°F (-1°C) 2.0 in Driest
March 41°F (5°C) 2.8 in
April 53°F (11°C) 4.0 in
May 63°F (17°C) 4.8 in
June 72°F (22°C) 4.9 in Wettest
July 75°F (24°C) 4.6 in Warmest
August 73°F (23°C) 4.0 in
September 67°F (19°C) 3.4 in
October 55°F (13°C) 3.4 in
November 42°F (5°C) 2.9 in
December 31°F (-1°C) 2.1 in

Potomac has a seasonal temperature swing of 49°F / from 26°F in January to 75°F in July. Total annual precipitation is 40.9 inches, with June being the wettest month (4.9") and February the driest (2.0").

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