St. Henry, OH
Full City Profile · Ohio · Mercer County County
4.6
/5.0
A+
Excellent
2,812
Population
1,625/sq mi density
$113,629
Median Income
$40,631 per capita
$273,100
Home Value
$278,335 Zillow
$743
Median Rent
25.0% income on rent
51°F
Avg Temperature
A+
Overall
4.6 / 5.0
Strong
A+
Economy
5.0 / 5.0
$113,629 median income, 0.3% unemployment
A+
Affordability
5.0 / 5.0
$273,100 home value, $743/mo rent
B+
Education
3.8 / 5.0
35.5% bachelor's degree or higher
St. Henry experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 26°F in January while summers reach 73°F in July. Annual precipitation totals 38.1 inches. The area receives 28.8 inches of snow annually.
Temperature
26°F Jan (-3°C)
73°F Jul (23°C)
| Annual Average | 51.4°F |
| 5% below US avg | |
| January Average | 26°F (-3°C) |
| July Average | 73°F (23°C) |
Geography
| Elevation | 965 ft (294 m) |
| Area | 1.7 sq mi (4.3 km²) |
| Population Density | 1,625/sq mi |
| Coordinates | 40.4203°N, 84.6315°W |
| Timezone | America/New_York |
| County | Mercer County County |
| Nearest Airport | James M Cox Dayton International (DAY) 42 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 31.7 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 96.3 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | No Rating |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 26°F (-3°C) | 2.7 in | Coldest |
| February | 30°F (-1°C) | 2.1 in | Driest |
| March | 39°F (4°C) | 3.0 in | |
| April | 51°F (11°C) | 3.9 in | |
| May | 62°F (17°C) | 3.7 in | |
| June | 71°F (21°C) | 4.6 in | Wettest |
| July | 73°F (23°C) | 3.9 in | Warmest |
| August | 72°F (22°C) | 3.2 in | |
| September | 66°F (19°C) | 2.6 in | |
| October | 54°F (12°C) | 2.9 in | |
| November | 42°F (5°C) | 2.9 in | |
| December | 31°F (-0°C) | 2.7 in |
St. Henry has a seasonal temperature swing of 47°F / from 26°F in January to 73°F in July. Total annual precipitation is 38.1 inches, with June being the wettest month (4.6") and February the driest (2.1").