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Eureka, IL
Full City Profile · Illinois · Woodford County County
3.3
/5.0
B
Good
5,095
Population
1,859/sq mi density
$55,172
Median Income
$36,229 per capita
$154,600
Home Value
$209,535 Zillow
$680
Median Rent
29.7% income on rent
52°F
Avg Temperature
275 sunny days/yr
474
Violent Crime/100K
758 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.8 / 5.0
$55,172 median income, 3.0% unemployment
A+
Affordability
5.0 / 5.0
$154,600 home value, $680/mo rent
F
Safety
1.0 / 5.0
474 violent crimes/100K (25% above avg)
B+
Education
3.6 / 5.0
31.9% bachelor's degree or higher
Eureka 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 37.5 inches. The area receives 22.3 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 | 52.1°F |
| 4% below US avg | |
| January Average | 25°F (-4°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 740 ft (226 m) |
| Area | 2.7 sq mi (7.1 km²) |
| Population Density | 1,859/sq mi |
| Coordinates | 40.7140°N, 89.2770°W |
| Timezone | America/Chicago |
| County | Woodford County County |
| Nearest Airport | General Downing - Peoria International (PIA) 22 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 39.9 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 96.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 25°F (-4°C) | 1.6 in | Coldest |
| February | 27°F (-3°C) | 1.6 in | Driest |
| March | 39°F (4°C) | 3.0 in | |
| April | 51°F (10°C) | 3.8 in | |
| May | 62°F (17°C) | 4.1 in | Wettest |
| June | 71°F (22°C) | 4.0 in | |
| July | 75°F (24°C) | 3.9 in | Warmest |
| August | 72°F (22°C) | 3.4 in | |
| September | 65°F (18°C) | 3.8 in | |
| October | 53°F (12°C) | 2.8 in | |
| November | 40°F (4°C) | 3.0 in | |
| December | 28°F (-2°C) | 2.6 in |
Eureka has a seasonal temperature swing of 50°F / from 25°F in January to 75°F in July. Total annual precipitation is 37.6 inches, with May being the wettest month (4.1") and February the driest (1.6").