Otterville, IL
Full City Profile · Illinois · Jersey County County
3.3
/5.0
B
Good
137
Population
136/sq mi density
$63,643
Median Income
$31,876 per capita
$57,500
Home Value
$256,371 Zillow
56°F
Avg Temperature
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.7 / 5.0
$63,643 median income, 5.7% unemployment
A+
Affordability
5.0 / 5.0
$57,500 home value, /mo rent
F
Education
1.1 / 5.0
1.6% bachelor's degree or higher
Otterville enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 31°F in January while summers reach 79°F in July. Annual precipitation totals 39.4 inches. The area receives 12.5 inches of snow annually. Air quality is rated Good with a median AQI of 42.
Temperature
31°F Jan (-1°C)
79°F Jul (26°C)
| Annual Average | 56.1°F |
| 4% above US avg | |
| January Average | 31°F (-1°C) |
| July Average | 79°F (26°C) |
Geography
| Elevation | 622 ft (190 m) |
| Area | 0.4 sq mi (1.0 km²) |
| Population Density | 136/sq mi |
| Coordinates | 39.0508°N, 90.3984°W |
| Timezone | America/Chicago |
| County | Jersey County County |
| Nearest Airport | St Louis Lambert International (STL) 21 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 42.0 |
| Rating | Good |
| Good Days % | 74.5% |
| Unhealthy Days | 1 |
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 | 31°F (-1°C) | 2.5 in | Coldest |
| February | 35°F (2°C) | 1.9 in | Driest |
| March | 45°F (7°C) | 3.1 in | |
| April | 57°F (14°C) | 4.2 in | |
| May | 67°F (19°C) | 4.6 in | Wettest |
| June | 75°F (24°C) | 4.6 in | |
| July | 79°F (26°C) | 3.7 in | Warmest |
| August | 77°F (25°C) | 3.7 in | |
| September | 69°F (21°C) | 3.0 in | |
| October | 58°F (14°C) | 2.7 in | |
| November | 45°F (7°C) | 3.2 in | |
| December | 36°F (2°C) | 2.4 in |
Otterville has a seasonal temperature swing of 48°F / from 31°F in January to 79°F in July. Total annual precipitation is 39.4 inches, with May being the wettest month (4.6") and February the driest (1.9").