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Chillicothe, IL
Full City Profile · Illinois · Peoria County County
3.3
/5.0
B
Good
6,185
Population
1,174/sq mi density
$62,108
Median Income
$37,620 per capita
$128,500
Home Value
$177,529 Zillow
$798
Median Rent
33.6% income on rent
51°F
Avg Temperature
275 sunny days/yr
412
Violent Crime/100K
708 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.0 / 5.0
$62,108 median income, 3.2% unemployment
A+
Affordability
5.0 / 5.0
$128,500 home value, $798/mo rent
F
Safety
1.0 / 5.0
412 violent crimes/100K (8% above avg)
B
Education
3.1 / 5.0
26.1% bachelor's degree or higher
Chillicothe 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. The area gets 275 sunny days per year. Annual precipitation totals 38.8 inches. The area receives 20.3 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
24°F Jan (-5°C)
74°F Jul (24°C)
| Annual Average | 50.8°F |
| 6% below US avg | |
| January Average | 24°F (-5°C) |
| July Average | 74°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 535 ft (163 m) |
| Area | 5.3 sq mi (13.6 km²) |
| Population Density | 1,174/sq mi |
| Coordinates | 40.9160°N, 89.5027°W |
| Timezone | America/Chicago |
| County | Peoria County County |
| Nearest Airport | General Downing - Peoria International (PIA) 20 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0489 ppm |
| PM2.5 (Fine Particles) | 8.6 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 90.7 / 100 |
| Social Vulnerability | 50.0 / 100 |
| Community Resilience | 93.6 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively High |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively High |
| Landslide | Relatively Moderate |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-5°C) | 1.5 in | Coldest |
| February | 27°F (-3°C) | 1.4 in | Driest |
| March | 39°F (4°C) | 2.9 in | |
| April | 51°F (10°C) | 3.8 in | |
| May | 62°F (16°C) | 4.0 in | |
| June | 71°F (22°C) | 4.1 in | Wettest |
| July | 74°F (24°C) | 3.9 in | Warmest |
| August | 73°F (23°C) | 3.5 in | |
| September | 65°F (19°C) | 3.9 in | |
| October | 54°F (12°C) | 2.8 in | |
| November | 40°F (5°C) | 2.8 in | |
| December | 28°F (-2°C) | 2.3 in |
Chillicothe has a seasonal temperature swing of 51°F / from 24°F in January to 74°F in July. Total annual precipitation is 36.8 inches, with June being the wettest month (4.1") and February the driest (1.4").