St. Martin, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Martin, a community in Brown County, Ohio.
This Afternoon
76°F
Sunny
Sunny, with a high near 76. South wind around 8 mph.
7-day forecast for St. Martin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Sunny | 8 mph S | 1% |
| Tonight | 60°F | Mostly Cloudy then Showers And Thunderstorms Likely | 8 to 14 mph SE | 60% |
| Wednesday | 67°F | Showers And Thunderstorms | 13 to 17 mph S | 100% |
| Wednesday Night | 52°F | Showers And Thunderstorms then Mostly Cloudy | 5 to 13 mph SW | 89% |
| Thursday | 66°F | Mostly Sunny | 5 to 13 mph SW | 0% |
| Thursday Night | 44°F | Partly Cloudy | 1 to 5 mph SW | 0% |
| Friday | 62°F | Partly Sunny | 2 to 8 mph NW | 6% |
| Friday Night | 39°F | Partly Cloudy | 7 mph NW | 12% |
| Saturday | 55°F | Mostly Sunny | 5 to 8 mph NW | 13% |
| Saturday Night | 34°F | Partly Cloudy | 3 mph NW | 13% |
| Sunday | 57°F | Mostly Sunny | 2 to 9 mph W | 8% |
| Sunday Night | 33°F | Partly Cloudy | 7 mph W | 14% |
| Monday | 59°F | Mostly Sunny | 5 to 9 mph W | 14% |
| Monday Night | 36°F | Mostly Clear | 7 mph SW | 12% |
Forecast source: National Weather Service (api.weather.gov) for St. Martin (39.212, -83.884). Updated through the day.
Growing snapshot for St. Martin
Last spring frost
Apr 24
First fall frost
Oct 20
Growing season
178 days
Hardiness zone
6b
More local growing data for St. Martin: nearby ZIP 45118 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Aberdeen
Buford
Fayetteville
Georgetown
Hamersville
Higginsport
Lake Lorelei
Lake Waynoka
Mount Orab
Ripley
Russellville
Sardinia
Climate data from the nearest NOAA station, Hillsboro, Oh (17 mi from St. Martin). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.