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Onarga, IL
Full City Profile · Illinois · Ford County County
2.9
/5.0
C+
Fair
1,362
Population
816/sq mi density
$64,286
Median Income
$27,566 per capita
$96,500
Home Value
$150,035 Zillow
$748
Median Rent
19.7% income on rent
52°F
Avg Temperature
275 sunny days/yr
78
Violent Crime/100K
627 property/100K
C+
Overall
2.9 / 5.0
Fair overall score based on economy, affordability, safety and education
B+
Economy
3.6 / 5.0
$64,286 median income, 6.1% unemployment
A+
Affordability
5.0 / 5.0
$96,500 home value, $748/mo rent
F
Safety
1.0 / 5.0
78 violent crimes/100K
D
Education
1.8 / 5.0
10.1% bachelor's degree or higher
Onarga experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 25°F in January while summers reach 75°F in July. The area gets 275 sunny days per year. Annual precipitation totals 44.4 inches. The area receives 24.7 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
25°F Jan (-4°C)
75°F Jul (24°C)
| Annual Average | 51.9°F |
| 4% below US avg | |
| January Average | 25°F (-4°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 676 ft (206 m) |
| Area | 1.7 sq mi (4.3 km²) |
| Population Density | 816/sq mi |
| Coordinates | 40.7153°N, 88.0108°W |
| Timezone | America/Chicago |
| County | Ford County County |
| Nearest Airport | Vermilion Regional (DNV) 42 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 26.2 / 100 |
| Social Vulnerability | 39.2 / 100 |
| Community Resilience | 91.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 3.0 m (10 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1954 | MICHIGAN CITY, IN (LAKE MICHIGAN) | Avalanche | 3.0 m | 7 | 145 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 25°F (-4°C) | 1.6 in | Coldest |
| February | 28°F (-2°C) | 1.5 in | Driest |
| March | 39°F (4°C) | 2.9 in | |
| April | 50°F (10°C) | 3.5 in | |
| May | 62°F (17°C) | 3.9 in | Wettest |
| June | 71°F (22°C) | 3.7 in | |
| July | 75°F (24°C) | 3.9 in | Warmest |
| August | 72°F (22°C) | 3.5 in | |
| September | 65°F (19°C) | 3.4 in | |
| October | 54°F (12°C) | 2.6 in | |
| November | 41°F (5°C) | 2.8 in | |
| December | 29°F (-2°C) | 2.6 in |
Onarga has a seasonal temperature swing of 50°F / from 25°F in January to 75°F in July. Total annual precipitation is 35.9 inches, with May being the wettest month (3.9") and February the driest (1.5").