Assumption, IL
Full City Profile · Illinois · Christian County County
3.2
/5.0
B
Good
1,117
Population
1,128/sq mi density
$55,764
Median Income
$29,285 per capita
$72,100
Home Value
$139,290 Zillow
$646
Median Rent
19.9% income on rent
54°F
Avg Temperature
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
C
Economy
2.4 / 5.0
$55,764 median income, 11.8% unemployment
A+
Affordability
5.0 / 5.0
$72,100 home value, $646/mo rent
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. Annual precipitation totals 40.7 inches. The area receives 14.5 inches of snow annually.
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) |
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
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) | 2.5 in | Coldest |
| February | 32°F (0°C) | 2.0 in | Driest |
| March | 42°F (6°C) | 3.1 in | |
| April | 54°F (12°C) | 4.4 in | |
| May | 64°F (18°C) | 5.0 in | Wettest |
| June | 73°F (23°C) | 4.8 in | |
| July | 76°F (25°C) | 3.3 in | Warmest |
| August | 75°F (24°C) | 3.2 in | |
| September | 68°F (20°C) | 3.3 in | |
| October | 56°F (13°C) | 3.3 in | |
| November | 43°F (6°C) | 3.4 in | |
| December | 33°F (1°C) | 2.5 in |
Assumption has a seasonal temperature swing of 48°F / from 28°F in January to 76°F in July. Total annual precipitation is 40.7 inches, with May being the wettest month (5.0") and February the driest (2.0").