Marathon, OH Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Marathon, a community in Clermont County, Ohio.

Tonight

61°F

Partly Cloudy then Patchy Fog

Patchy fog after 4am. Partly cloudy, with a low around 61. East wind around 5 mph.

7-day forecast for Marathon

When	Temp	Forecast	Wind	Precip
Tonight	61°F	Partly Cloudy then Patchy Fog	5 mph E	2%
Saturday	84°F	Areas Of Fog then Chance Rain Showers	6 mph SE	34%
Saturday Night	67°F	Chance Showers And Thunderstorms	5 mph S	43%
Sunday	85°F	Chance Showers And Thunderstorms	7 mph SW	45%
Sunday Night	63°F	Chance Showers And Thunderstorms	9 mph NE	45%
Monday	78°F	Chance Showers And Thunderstorms	10 mph NE	42%
Monday Night	59°F	Chance Showers And Thunderstorms	8 to 13 mph NE	50%
Tuesday	74°F	Chance Showers And Thunderstorms	12 mph NE	50%
Tuesday Night	59°F	Chance Showers And Thunderstorms	6 to 12 mph NE	45%
Wednesday	72°F	Chance Rain Showers	9 mph N	44%
Wednesday Night	57°F	Chance Showers And Thunderstorms	5 to 10 mph N	39%
Thursday	72°F	Partly Sunny	6 to 9 mph N	10%
Thursday Night	56°F	Mostly Cloudy	5 to 9 mph N	10%
Friday	72°F	Partly Sunny	6 to 9 mph N	6%

Forecast source: National Weather Service (api.weather.gov) for Marathon (39.145, -84.006). Updated through the day.

Growing snapshot for Marathon

Last spring frost

Apr 23

First fall frost

Oct 18

Growing season

177 days

Hardiness zone

More local growing data for Marathon: nearby ZIP 45176 weather · frost dates · planting calendar · Ohio frost dates

Nearby towns & communities

Amelia Batavia Bethel Chilo Day Heights Felicity Goshen Loveland Miamiville Moscow Mount Repose Neville New Richmond Owensville Remington Williamsburg Withamsville

All Ohio locations ›

Climate data from the nearest NOAA station, Milford, Oh (15.5 mi from Marathon). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.