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
80°F
Mostly Cloudy
Mostly cloudy, with a high near 80. Northeast wind around 9 mph.
7-day forecast for St. Martin
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 80°F | Mostly Cloudy | 9 mph NE | 4% |
| Tonight | 60°F | Partly Cloudy then Patchy Fog | 5 to 9 mph NE | 2% |
| Saturday | 83°F | Patchy Fog then Chance Rain Showers | 6 mph SE | 33% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 6 mph S | 48% |
| Sunday | 83°F | Chance Showers And Thunderstorms | 5 to 8 mph SW | 48% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 7 to 10 mph N | 48% |
| Monday | 76°F | Chance Showers And Thunderstorms | 12 mph NE | 44% |
| Monday Night | 59°F | Chance Showers And Thunderstorms | 9 to 14 mph NE | 51% |
| Tuesday | 73°F | Chance Showers And Thunderstorms | 12 mph NE | 51% |
| Tuesday Night | 58°F | Chance Showers And Thunderstorms | 7 to 13 mph NE | 45% |
| Wednesday | 71°F | Chance Rain Showers | 10 mph N | 45% |
| Wednesday Night | 56°F | Chance Showers And Thunderstorms | 6 to 10 mph N | 42% |
| Thursday | 71°F | Partly Sunny | 9 mph N | 10% |
| Thursday Night | 55°F | Mostly Cloudy | 5 to 9 mph N | 10% |
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 Sep 18, 2026.