Marathon, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Marathon, a community in Clermont County, Ohio.
Overnight
61°F
Chance Light Rain
A chance of rain. Cloudy, with a low around 61. South wind around 14 mph, with gusts as high as 24 mph. Chance of precipitation is 50%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Marathon
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Chance Light Rain | 14 mph S | 53% |
| Wednesday | 66°F | Light Rain | 16 mph S | 99% |
| Wednesday Night | 50°F | Light Rain Likely then Mostly Cloudy | 3 to 13 mph SW | 70% |
| Thursday | 65°F | Mostly Sunny | 5 to 12 mph SW | 0% |
| Thursday Night | 43°F | Partly Cloudy | 1 to 5 mph SW | 0% |
| Friday | 59°F | Partly Sunny then Chance Light Rain | 1 to 9 mph W | 30% |
| Friday Night | 37°F | Chance Light Rain then Mostly Cloudy | 5 to 9 mph NW | 30% |
| Saturday | 54°F | Mostly Sunny | 5 to 9 mph NW | 1% |
| Saturday Night | 33°F | Partly Cloudy | 1 to 5 mph NW | 0% |
| Sunday | 56°F | Mostly Sunny | 1 to 9 mph W | 2% |
| Sunday Night | 32°F | Mostly Clear | 2 to 6 mph W | 3% |
| Monday | 59°F | Sunny | 2 to 7 mph SW | 2% |
| Monday Night | 35°F | Mostly Clear | 5 mph SW | 2% |
| Tuesday | 63°F | Sunny | 5 to 8 mph SW | 1% |
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 Nov 4, 2026.