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Jerseyville, IL
Full City Profile · Illinois · Jersey County County
3.2
/5.0
B
Good
7,432
Population
1,418/sq mi density
$71,623
Median Income
$34,695 per capita
$124,200
Home Value
$138,029 Zillow
$826
Median Rent
25.4% income on rent
53°F
Avg Temperature
293 sunny days/yr
402
Violent Crime/100K
1,779 property/100K
B
Overall
3.2 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.1 / 5.0
$71,623 median income, 1.6% unemployment
A+
Affordability
5.0 / 5.0
$124,200 home value, $826/mo rent
F
Safety
1.0 / 5.0
402 violent crimes/100K (6% above avg)
C+
Education
2.5 / 5.0
19.2% bachelor's degree or higher
Jerseyville experiences four distinct seasons with an average annual temperature of 53°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 42.2 inches. The area receives 12.5 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 | 53.4°F |
| 1% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 76°F (25°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 658 ft (201 m) |
| Area | 5.1 sq mi (13.2 km²) |
| Population Density | 1,418/sq mi |
| Coordinates | 39.1172°N, 90.3267°W |
| Timezone | America/Chicago |
| County | Jersey County County |
| Nearest Airport | St Louis Regional (ALN) 22 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0508 ppm |
| PM2.5 (Fine Particles) | 7.8 μg/m³ |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 18.9 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 82.8 / 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 Moderate |
| Winter Weather | Very 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 | 28°F (-2°C) | 1.7 in | Coldest, Driest |
| February | 32°F (0°C) | 1.9 in | |
| March | 43°F (6°C) | 3.4 in | |
| April | 54°F (12°C) | 3.7 in | |
| May | 64°F (18°C) | 4.1 in | Wettest |
| June | 73°F (23°C) | 3.5 in | |
| July | 76°F (25°C) | 3.8 in | Warmest |
| August | 75°F (24°C) | 3.4 in | |
| September | 68°F (20°C) | 3.4 in | |
| October | 56°F (13°C) | 2.8 in | |
| November | 43°F (6°C) | 3.2 in | |
| December | 32°F (0°C) | 2.9 in |
Jerseyville has a seasonal temperature swing of 48°F / from 28°F in January to 76°F in July. Total annual precipitation is 38.0 inches, with May being the wettest month (4.1") and January the driest (1.7").