Eureka, IL
Full City Profile · Illinois · Woodford County County
4.0
/5.0
A
Great
5,095
Population
1,859/sq mi density
$55,172
Median Income
$36,229 per capita
$154,600
Home Value
$217,950 Zillow
$680
Median Rent
29.7% income on rent
52°F
Avg Temperature
A
Overall
4.0 / 5.0
Strong
B+
Economy
3.5 / 5.0
$55,172 median income, 5.2% unemployment
A+
Affordability
5.0 / 5.0
$154,600 home value, $680/mo rent
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. Annual precipitation totals 37.9 inches. The area receives 21.2 inches of snow annually.
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) |
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
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) | 2.2 in | Coldest |
| February | 29°F (-1°C) | 1.9 in | Driest |
| March | 41°F (5°C) | 2.3 in | |
| April | 52°F (11°C) | 3.7 in | |
| May | 63°F (17°C) | 4.5 in | Wettest |
| June | 72°F (22°C) | 4.1 in | |
| July | 75°F (24°C) | 3.6 in | Warmest |
| August | 73°F (23°C) | 3.7 in | |
| September | 67°F (20°C) | 3.2 in | |
| October | 55°F (13°C) | 3.5 in | |
| November | 42°F (5°C) | 2.9 in | |
| December | 31°F (-1°C) | 2.3 in |
Eureka has a seasonal temperature swing of 50°F / from 25°F in January to 75°F in July. Total annual precipitation is 37.9 inches, with May being the wettest month (4.5") and February the driest (1.9").