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Marathon, OH
Full City Profile · Ohio · Clermont County County
1.2
/5.0
F
Poor
150
Population
882/sq mi density
54°F
Avg Temperature
297 sunny days/yr
79
Violent Crime/100K
2,090 property/100K
F
Overall
1.2 / 5.0
Below average overall score based on economy, affordability, safety and education
F
Safety
1.0 / 5.0
79 violent crimes/100K
F
Education
1.4 / 5.0
0.0% bachelor's degree or higher
Marathon experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 30°F in January while summers reach 75°F in July. The area gets 297 sunny days per year. Air quality is rated Good with a median AQI of 43.
Temperature
30°F Jan (-1°C)
75°F Jul (24°C)
| Annual Average | 53.8°F |
| 0% below US avg | |
| January Average | 30°F (-1°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 297 days/yr |
Geography
| Elevation | 917 ft (280 m) |
| Area | 0.2 sq mi (0.4 km²) |
| Population Density | 882/sq mi |
| Coordinates | 39.1453°N, 84.0062°W |
| Timezone | America/New_York |
| County | Clermont County County |
| Nearest Airport | Butler County Regional/Hogan Field (HAO) 31 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0471 ppm |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 77.9 / 100 |
| Social Vulnerability | 17.0 / 100 |
| Community Resilience | 67.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 2.8 in | Coldest |
| February | 32°F (0°C) | 2.8 in | Driest |
| March | 42°F (6°C) | 4.1 in | |
| April | 52°F (11°C) | 4.1 in | |
| May | 62°F (17°C) | 4.7 in | Wettest |
| June | 70°F (21°C) | 3.8 in | |
| July | 75°F (24°C) | 4.4 in | Warmest |
| August | 73°F (23°C) | 3.9 in | |
| September | 66°F (19°C) | 3.4 in | |
| October | 55°F (13°C) | 2.8 in | |
| November | 44°F (7°C) | 3.5 in | |
| December | 34°F (1°C) | 3.2 in |
Marathon has a seasonal temperature swing of 45°F / from 30°F in January to 75°F in July. Total annual precipitation is 43.4 inches, with May being the wettest month (4.7") and February the driest (2.8").