Sullivan, IL
Full City Profile · Illinois · Moultrie County County
3.1
/5.0
B
Good
4,253
Population
1,535/sq mi density
$62,845
Median Income
$33,819 per capita
$95,600
Home Value
$200,042 Zillow
$790
Median Rent
27.3% income on rent
53°F
Avg Temperature
71
Violent Crime/100K
71 property/100K
B
Overall
3.1 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.0 / 5.0
$62,845 median income, 2.4% unemployment
A+
Affordability
5.0 / 5.0
$95,600 home value, $790/mo rent
F
Safety
1.0 / 5.0
71 violent crimes/100K
C
Education
2.4 / 5.0
17.4% bachelor's degree or higher
Sullivan experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 27°F in January while summers reach 76°F in July. Annual precipitation totals 41.6 inches. The area receives 12.9 inches of snow annually.
Temperature
27°F Jan (-3°C)
76°F Jul (24°C)
| Annual Average | 53.0°F |
| 2% below US avg | |
| January Average | 27°F (-3°C) |
| July Average | 76°F (24°C) |
Geography
| Elevation | 675 ft (206 m) |
| Area | 2.7 sq mi (6.9 km²) |
| Population Density | 1,535/sq mi |
| Coordinates | 39.5952°N, 88.6089°W |
| Timezone | America/Chicago |
| County | Moultrie County County |
| Nearest Airport | Central Il Regional/Bloomington-Normal (BMI) 63 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 45.0 / 100 |
| Social Vulnerability | 81.2 / 100 |
| Community Resilience | 60.4 / 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 | Very Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 27°F (-3°C) | 2.4 in | Coldest |
| February | 31°F (-1°C) | 2.2 in | Driest |
| March | 41°F (5°C) | 2.8 in | |
| April | 53°F (12°C) | 4.5 in | |
| May | 64°F (18°C) | 5.0 in | Wettest |
| June | 73°F (23°C) | 5.0 in | |
| July | 76°F (24°C) | 4.4 in | Warmest |
| August | 74°F (23°C) | 3.2 in | |
| September | 67°F (20°C) | 2.7 in | |
| October | 56°F (13°C) | 3.3 in | |
| November | 43°F (6°C) | 3.5 in | |
| December | 32°F (0°C) | 2.8 in |
Sullivan has a seasonal temperature swing of 49°F / from 27°F in January to 76°F in July. Total annual precipitation is 41.6 inches, with May being the wettest month (5.0") and February the driest (2.2").