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
6b
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
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.