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St. Martin, OH
Full City Profile · Ohio · Clinton County County
2.7
/5.0
C+
Fair
133
Population
69/sq mi density
53°F
Avg Temperature
293 sunny days/yr
191
Violent Crime/100K
2,890 property/100K
C+
Overall
2.7 / 5.0
Fair overall score based on economy, affordability, safety and education
F
Safety
1.0 / 5.0
191 violent crimes/100K
A
Education
4.3 / 5.0
0.0% bachelor's degree or higher
St. Martin experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 29°F in January while summers reach 74°F in July. The area gets 293 sunny days per year. Annual precipitation totals 42.4 inches. Air quality is rated Good with a median AQI of 43.
Temperature
29°F Jan (-2°C)
74°F Jul (23°C)
| Annual Average | 52.6°F |
| 3% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 972 ft (296 m) |
| Area | 1.1 sq mi (2.8 km²) |
| Population Density | 69/sq mi |
| Coordinates | 39.2118°N, 83.8844°W |
| Timezone | America/New_York |
| County | Clinton County County |
| Nearest Airport | Middletown Regional/Hook Field (MWO) 35 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0477 ppm |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 34.0 / 100 |
| Social Vulnerability | 31.1 / 100 |
| Community Resilience | 81.0 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 2.8 in | Coldest |
| February | 31°F (-0°C) | 2.8 in | |
| March | 41°F (5°C) | 3.8 in | |
| April | 51°F (11°C) | 4.1 in | |
| May | 61°F (16°C) | 4.7 in | Wettest |
| June | 70°F (21°C) | 3.7 in | |
| July | 74°F (23°C) | 4.4 in | Warmest |
| August | 72°F (22°C) | 3.7 in | |
| September | 66°F (19°C) | 3.3 in | |
| October | 54°F (12°C) | 2.6 in | Driest |
| November | 43°F (6°C) | 3.3 in | |
| December | 34°F (1°C) | 3.1 in |
St. Martin has a seasonal temperature swing of 45°F / from 29°F in January to 74°F in July. Total annual precipitation is 42.3 inches, with May being the wettest month (4.7") and October the driest (2.6").