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Vernon, IL
Full City Profile · Illinois · Bond County County
3.1
/5.0
B
Good
83
Population
94/sq mi density
$49,583
Median Income
$30,467 per capita
$625
Median Rent
10.0% income on rent
54°F
Avg Temperature
293 sunny days/yr
B
Overall
3.1 / 5.0
Good overall score based on economy, affordability, safety and education
B
Economy
3.1 / 5.0
$49,583 median income, 2.6% unemployment
A+
Affordability
5.0 / 5.0
C+
Safety
2.5 / 5.0
0 violent crimes/100K
D
Education
1.7 / 5.0
9.2% bachelor's degree or higher
Vernon experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 29°F in January while summers reach 77°F in July. The area gets 293 sunny days per year. Annual precipitation totals 43.7 inches. Air quality is rated Good with a median AQI of 43.
Temperature
29°F Jan (-2°C)
77°F Jul (25°C)
| Annual Average | 54.2°F |
| 0% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 514 ft (157 m) |
| Area | 0.4 sq mi (0.9 km²) |
| Population Density | 94/sq mi |
| Coordinates | 38.8014°N, 89.0875°W |
| Timezone | America/Chicago |
| County | Bond County County |
| Nearest Airport | St Louis Regional (ALN) 52 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 36.2 / 100 |
| Social Vulnerability | 43.7 / 100 |
| Community Resilience | 76.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Very Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 2.0 in | Coldest, Driest |
| February | 33°F (0°C) | 2.3 in | |
| March | 43°F (6°C) | 3.9 in | |
| April | 54°F (12°C) | 3.8 in | |
| May | 64°F (18°C) | 4.2 in | Wettest |
| June | 73°F (23°C) | 4.0 in | |
| July | 77°F (25°C) | 3.9 in | Warmest |
| August | 75°F (24°C) | 2.9 in | |
| September | 68°F (20°C) | 3.1 in | |
| October | 57°F (14°C) | 3.0 in | |
| November | 45°F (7°C) | 3.7 in | |
| December | 34°F (1°C) | 3.4 in |
Vernon has a seasonal temperature swing of 48°F / from 29°F in January to 77°F in July. Total annual precipitation is 40.1 inches, with May being the wettest month (4.2") and January the driest (2.0").