Johnsonville, IL
Full City Profile · Illinois · Wayne County County
2.7
/5.0
C+
Fair
37
Population
176/sq mi density
$36,250
Median Income
$19,100 per capita
55°F
Avg Temperature
C+
Overall
2.7 / 5.0
Fair overall score based on economy, affordability, safety and education
C+
Economy
2.5 / 5.0
$36,250 median income, 0.0% unemployment
C+
Education
2.8 / 5.0
22.7% bachelor's degree or higher
Johnsonville experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 30°F in January while summers reach 77°F in July. Annual precipitation totals 47.0 inches. The area receives 11.9 inches of snow annually.
Temperature
30°F Jan (-1°C)
77°F Jul (25°C)
| Annual Average | 55.1°F |
| 2% above US avg | |
| January Average | 30°F (-1°C) |
| July Average | 77°F (25°C) |
Geography
| Elevation | 546 ft (166 m) |
| Area | 0.1 sq mi (0.2 km²) |
| Population Density | 176/sq mi |
| Coordinates | 38.5209°N, 88.5382°W |
| Timezone | America/Chicago |
| County | Wayne County County |
| Nearest Airport | Lawrenceville-Vincennes International (LWV) 53 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 40.7 / 100 |
| Social Vulnerability | 32.0 / 100 |
| Community Resilience | 53.7 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 3.5 in | Coldest |
| February | 35°F (1°C) | 2.5 in | Driest |
| March | 44°F (7°C) | 4.0 in | |
| April | 55°F (13°C) | 5.3 in | Wettest |
| May | 66°F (19°C) | 4.9 in | |
| June | 75°F (24°C) | 5.0 in | |
| July | 77°F (25°C) | 4.4 in | Warmest |
| August | 76°F (24°C) | 3.4 in | |
| September | 69°F (20°C) | 3.5 in | |
| October | 57°F (14°C) | 3.7 in | |
| November | 44°F (7°C) | 3.9 in | |
| December | 35°F (1°C) | 3.0 in |
Johnsonville has a seasonal temperature swing of 47°F / from 30°F in January to 77°F in July. Total annual precipitation is 47.0 inches, with April being the wettest month (5.3") and February the driest (2.5").