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Mount Sterling, IL
Full City Profile · Illinois · Brown County County
3.6
/5.0
B+
Good
1,949
Population
1,624/sq mi density
$63,922
Median Income
$33,774 per capita
$118,100
Home Value
$132,461 Zillow
$712
Median Rent
23.9% income on rent
53°F
Avg Temperature
302 sunny days/yr
B+
Overall
3.6 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.1 / 5.0
$63,922 median income, 1.0% unemployment
A+
Affordability
5.0 / 5.0
$118,100 home value, $712/mo rent
C+
Safety
2.5 / 5.0
0 violent crimes/100K
C+
Education
2.9 / 5.0
24.0% bachelor's degree or higher
Mount Sterling 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. The area gets 302 sunny days per year. Annual precipitation totals 39.1 inches. The area receives 20.9 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
27°F Jan (-3°C)
76°F Jul (25°C)
| Annual Average | 53.3°F |
| 1% below US avg | |
| January Average | 27°F (-3°C) |
| July Average | 76°F (25°C) |
| Sunny Days | 302 days/yr |
Geography
| Elevation | 739 ft (225 m) |
| Area | 1.1 sq mi (2.9 km²) |
| Population Density | 1,624/sq mi |
| Coordinates | 39.9854°N, 90.7641°W |
| Timezone | America/Chicago |
| County | Brown County County |
| Nearest Airport | Quincy Regional-Baldwin Field (UIN) 23 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 4.7 / 100 |
| Social Vulnerability | 33.6 / 100 |
| Community Resilience | 71.1 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Very 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 | 27°F (-3°C) | 1.4 in | Coldest, Driest |
| February | 30°F (-1°C) | 1.6 in | |
| March | 41°F (5°C) | 3.0 in | |
| April | 53°F (12°C) | 3.9 in | |
| May | 63°F (17°C) | 4.5 in | Wettest |
| June | 72°F (22°C) | 3.7 in | |
| July | 76°F (25°C) | 4.0 in | Warmest |
| August | 74°F (23°C) | 3.4 in | |
| September | 66°F (19°C) | 3.8 in | |
| October | 55°F (13°C) | 3.0 in | |
| November | 42°F (5°C) | 3.1 in | |
| December | 30°F (-1°C) | 2.4 in |
Mount Sterling has a seasonal temperature swing of 49°F / from 27°F in January to 76°F in July. Total annual precipitation is 37.9 inches, with May being the wettest month (4.5") and January the driest (1.4").