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Assumption, IL
Full City Profile · Illinois · Christian County County
2.7
/5.0
C+
Fair
1,117
Population
1,128/sq mi density
$55,764
Median Income
$29,285 per capita
$72,100
Home Value
$131,717 Zillow
$646
Median Rent
19.9% income on rent
54°F
Avg Temperature
293 sunny days/yr
373
Violent Crime/100K
1,587 property/100K
C+
Overall
2.7 / 5.0
Fair overall score based on economy, affordability, safety and education
C+
Economy
2.8 / 5.0
$55,764 median income, 7.8% unemployment
A+
Affordability
5.0 / 5.0
$72,100 home value, $646/mo rent
F
Safety
1.0 / 5.0
373 violent crimes/100K
C
Education
2.2 / 5.0
14.8% bachelor's degree or higher
Assumption experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 28°F in January while summers reach 76°F in July. The area gets 293 sunny days per year. Annual precipitation totals 42.3 inches. The area receives 14.5 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
28°F Jan (-2°C)
76°F Jul (25°C)
| Annual Average | 53.6°F |
| 1% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 76°F (25°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 639 ft (195 m) |
| Area | 1.0 sq mi (2.6 km²) |
| Population Density | 1,128/sq mi |
| Coordinates | 39.5180°N, 89.0477°W |
| Timezone | America/Chicago |
| County | Christian County County |
| Nearest Airport | Central Il Regional/Bloomington-Normal (BMI) 67 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 54.0 / 100 |
| Social Vulnerability | 17.1 / 100 |
| Community Resilience | 85.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively High |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 2.0 in | Coldest, Driest |
| February | 30°F (-1°C) | 2.0 in | |
| March | 42°F (5°C) | 3.4 in | |
| April | 53°F (12°C) | 3.9 in | |
| May | 64°F (18°C) | 4.3 in | Wettest |
| June | 73°F (23°C) | 4.1 in | |
| July | 76°F (25°C) | 4.0 in | Warmest |
| August | 74°F (23°C) | 3.4 in | |
| September | 67°F (20°C) | 3.1 in | |
| October | 55°F (13°C) | 2.8 in | |
| November | 43°F (6°C) | 3.4 in | |
| December | 31°F (-0°C) | 2.9 in |
Assumption has a seasonal temperature swing of 48°F / from 28°F in January to 76°F in July. Total annual precipitation is 39.3 inches, with May being the wettest month (4.3") and January the driest (2.0").