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Henry, IL
Full City Profile · Illinois · Marshall County County
3.1
/5.0
B
Good
2,478
Population
1,377/sq mi density
$63,894
Median Income
$30,120 per capita
$115,900
Home Value
$114,138 Zillow
$674
Median Rent
25.1% income on rent
53°F
Avg Temperature
275 sunny days/yr
299
Violent Crime/100K
1,283 property/100K
B
Overall
3.1 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.7 / 5.0
$63,894 median income, 2.3% unemployment
A+
Affordability
5.0 / 5.0
$115,900 home value, $674/mo rent
F
Safety
1.0 / 5.0
299 violent crimes/100K
C+
Education
2.7 / 5.0
20.8% bachelor's degree or higher
Henry experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 26°F in January while summers reach 76°F in July. The area gets 275 sunny days per year. Annual precipitation totals 38.4 inches. The area receives 24.6 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
26°F Jan (-3°C)
76°F Jul (24°C)
| Annual Average | 52.6°F |
| 3% below US avg | |
| January Average | 26°F (-3°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 493 ft (150 m) |
| Area | 1.8 sq mi (4.7 km²) |
| Population Density | 1,377/sq mi |
| Coordinates | 41.1174°N, 89.3573°W |
| Timezone | America/Chicago |
| County | Marshall County County |
| Nearest Airport | Illinois Valley Regional-Walter A Duncan Field (VYS) 19 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 27.2 / 100 |
| Social Vulnerability | 45.7 / 100 |
| Community Resilience | 92.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Very Low |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| 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 | 26°F (-3°C) | 1.5 in | Coldest |
| February | 27°F (-3°C) | 1.3 in | Driest |
| March | 39°F (4°C) | 2.8 in | |
| April | 50°F (10°C) | 3.7 in | |
| May | 61°F (16°C) | 3.9 in | |
| June | 71°F (21°C) | 4.0 in | Wettest |
| July | 76°F (24°C) | 3.9 in | Warmest |
| August | 73°F (23°C) | 3.6 in | |
| September | 65°F (18°C) | 3.9 in | |
| October | 54°F (12°C) | 2.7 in | |
| November | 40°F (5°C) | 2.7 in | |
| December | 28°F (-2°C) | 2.2 in |
Henry has a seasonal temperature swing of 50°F / from 26°F in January to 76°F in July. Total annual precipitation is 36.2 inches, with June being the wettest month (4.0") and February the driest (1.3").