Genoa, IL
Full City Profile · Illinois · Boone County County
3.6
/5.0
B+
Good
5,685
Population
2,187/sq mi density
$79,343
Median Income
$34,750 per capita
$201,600
Home Value
$321,509 Zillow
$1,004
Median Rent
22.3% income on rent
49°F
Avg Temperature
B+
Overall
3.6 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.7 / 5.0
$79,343 median income, 5.8% unemployment
A+
Affordability
5.0 / 5.0
$201,600 home value, $1,004/mo rent
D
Education
2.0 / 5.0
12.3% bachelor's degree or higher
Genoa experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 21°F in January while summers reach 73°F in July. Annual precipitation totals 38.0 inches. The area receives 38.9 inches of snow annually.
Temperature
21°F Jan (-6°C)
73°F Jul (23°C)
| Annual Average | 48.5°F |
| 10% below US avg | |
| January Average | 21°F (-6°C) |
| July Average | 73°F (23°C) |
Geography
| Elevation | 838 ft (255 m) |
| Area | 1.0 sq mi (2.5 km²) |
| Population Density | 2,187/sq mi |
| Coordinates | 42.0910°N, 88.6950°W |
| Timezone | America/Chicago |
| County | Boone County County |
| Nearest Airport | Chicago/Rockford International (RFD) 22 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 57.4 / 100 |
| Social Vulnerability | 27.9 / 100 |
| Community Resilience | 72.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 21°F (-6°C) | 1.8 in | Coldest |
| February | 25°F (-4°C) | 1.7 in | Driest |
| March | 36°F (2°C) | 2.5 in | |
| April | 48°F (9°C) | 3.7 in | |
| May | 60°F (15°C) | 4.7 in | |
| June | 70°F (21°C) | 4.8 in | Wettest |
| July | 73°F (23°C) | 3.8 in | Warmest |
| August | 71°F (22°C) | 4.4 in | |
| September | 64°F (18°C) | 3.4 in | |
| October | 52°F (11°C) | 3.0 in | |
| November | 38°F (3°C) | 2.3 in | |
| December | 26°F (-3°C) | 1.9 in |
Genoa has a seasonal temperature swing of 53°F / from 21°F in January to 73°F in July. Total annual precipitation is 38.0 inches, with June being the wettest month (4.8") and February the driest (1.7").