Hillsdale, IL
Full City Profile · Illinois · Henry County County
3.3
/5.0
B
Good
489
Population
752/sq mi density
$84,583
Median Income
$35,308 per capita
$96,700
Home Value
$168,307 Zillow
$781
Median Rent
24.2% income on rent
51°F
Avg Temperature
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
C+
Economy
2.9 / 5.0
$84,583 median income, 12.5% unemployment
A+
Affordability
5.0 / 5.0
$96,700 home value, $781/mo rent
D
Education
1.9 / 5.0
11.5% bachelor's degree or higher
Hillsdale experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 23°F in January while summers reach 75°F in July. Annual precipitation totals 39.1 inches. The area receives 28.4 inches of snow annually.
Temperature
23°F Jan (-5°C)
75°F Jul (24°C)
| Annual Average | 50.9°F |
| 6% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 75°F (24°C) |
Geography
| Elevation | 581 ft (177 m) |
| Area | 0.3 sq mi (0.7 km²) |
| Population Density | 752/sq mi |
| Coordinates | 41.6069°N, 90.1728°W |
| Timezone | America/Chicago |
| County | Henry County County |
| Nearest Airport | Quad Cities International (MLI) 20 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 57.1 / 100 |
| Social Vulnerability | 14.8 / 100 |
| Community Resilience | 83.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Relatively High |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 1.6 in | Coldest, Driest |
| February | 27°F (-3°C) | 1.8 in | |
| March | 39°F (4°C) | 2.7 in | |
| April | 51°F (11°C) | 4.0 in | |
| May | 63°F (17°C) | 4.9 in | Wettest |
| June | 72°F (22°C) | 4.4 in | |
| July | 75°F (24°C) | 4.1 in | Warmest |
| August | 73°F (23°C) | 4.1 in | |
| September | 66°F (19°C) | 3.6 in | |
| October | 53°F (12°C) | 3.2 in | |
| November | 40°F (4°C) | 2.6 in | |
| December | 28°F (-2°C) | 2.1 in |
Hillsdale has a seasonal temperature swing of 53°F / from 23°F in January to 75°F in July. Total annual precipitation is 39.1 inches, with May being the wettest month (4.9") and January the driest (1.6").