All Countries
Millersburg, IL
Full City Profile · Illinois · Mercer County County
2.4
/5.0
C
Fair
36
Population
120/sq mi density
50°F
Avg Temperature
275 sunny days/yr
82
Violent Crime/100K
934 property/100K
C
Overall
2.4 / 5.0
Fair overall score based on economy, affordability, safety and education
F
Safety
1.0 / 5.0
82 violent crimes/100K
B+
Education
3.8 / 5.0
0.0% bachelor's degree or higher
Millersburg experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 22°F in January while summers reach 74°F in July. The area gets 275 sunny days per year. Annual precipitation totals 39.1 inches. The area receives 21.8 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
22°F Jan (-5°C)
74°F Jul (23°C)
| Annual Average | 50.0°F |
| 7% below US avg | |
| January Average | 22°F (-5°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 741 ft (226 m) |
| Area | 0.3 sq mi (0.8 km²) |
| Population Density | 120/sq mi |
| Coordinates | 41.2403°N, 90.8186°W |
| Timezone | America/Chicago |
| County | Mercer County County |
| Nearest Airport | Quad Cities International (MLI) 22 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 8.8 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 85.7 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-5°C) | 1.3 in | Coldest |
| February | 26°F (-3°C) | 1.2 in | Driest |
| March | 38°F (4°C) | 2.6 in | |
| April | 51°F (10°C) | 3.7 in | |
| May | 62°F (17°C) | 4.0 in | |
| June | 71°F (22°C) | 4.3 in | |
| July | 74°F (23°C) | 4.3 in | Warmest, Wettest |
| August | 72°F (22°C) | 4.1 in | |
| September | 64°F (18°C) | 3.7 in | |
| October | 53°F (12°C) | 2.8 in | |
| November | 39°F (4°C) | 2.4 in | |
| December | 26°F (-3°C) | 2.0 in |
Millersburg has a seasonal temperature swing of 52°F / from 22°F in January to 74°F in July. Total annual precipitation is 36.3 inches, with July being the wettest month (4.3") and February the driest (1.2").