St. Martin, OH
Full City Profile · Ohio · Clinton County County
4.3
/5.0
A
Great
133
Population
69/sq mi density
53°F
Avg Temperature
A
Overall
4.3 / 5.0
Strong
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. Annual precipitation totals 42.4 inches. The area receives 18.1 inches of snow annually. Air quality is rated Good with a median AQI of 44.
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) |
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 | 44.0 |
| Rating | Good |
| Good Days % | 73.3% |
| Unhealthy Days | 4 |
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) | 2.9 in | Coldest |
| February | 32°F (0°C) | 2.7 in | Driest |
| March | 41°F (5°C) | 3.6 in | |
| April | 53°F (12°C) | 4.5 in | |
| May | 63°F (17°C) | 4.6 in | |
| June | 71°F (22°C) | 4.6 in | Wettest |
| July | 74°F (23°C) | 3.9 in | Warmest |
| August | 72°F (22°C) | 3.2 in | |
| September | 66°F (19°C) | 2.9 in | |
| October | 55°F (13°C) | 3.2 in | |
| November | 43°F (6°C) | 3.1 in | |
| December | 34°F (1°C) | 3.2 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 42.4 inches, with June being the wettest month (4.6") and February the driest (2.7").