Casstown, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Casstown, a village in Miami County, Ohio.
This Afternoon
83°F
Chance Showers And Thunderstorms
A slight chance of rain showers before 2pm, then a chance of showers and thunderstorms between 2pm and 4pm, then showers and thunderstorms likely. Mostly cloudy, with a high near 83. South wind around 8 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Casstown
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Chance Showers And Thunderstorms | 8 mph S | 68% |
| Tonight | 67°F | Chance Showers And Thunderstorms | 7 mph S | 56% |
| Sunday | 82°F | Chance Showers And Thunderstorms | 5 to 10 mph W | 68% |
| Sunday Night | 58°F | Showers And Thunderstorms Likely | 13 mph NE | 66% |
| Monday | 69°F | Chance Rain Showers | 12 to 16 mph NE | 45% |
| Monday Night | 54°F | Chance Rain Showers | 12 to 16 mph NE | 45% |
| Tuesday | 69°F | Slight Chance Rain Showers | 12 to 15 mph NE | 17% |
| Tuesday Night | 56°F | Chance Rain Showers | 10 to 15 mph NE | 45% |
| Wednesday | 69°F | Chance Rain Showers | 12 mph NE | 54% |
| Wednesday Night | 56°F | Chance Showers And Thunderstorms | 7 to 13 mph NE | 54% |
| Thursday | 70°F | Mostly Cloudy | 9 mph NE | 14% |
| Thursday Night | 54°F | Mostly Cloudy | 6 to 10 mph N | 14% |
| Friday | 71°F | Partly Sunny | 7 to 12 mph NE | 10% |
| Friday Night | 52°F | Partly Cloudy | 6 to 12 mph NE | 10% |
Forecast source: National Weather Service (api.weather.gov) for Casstown (40.053, -84.129). Updated through the day.
Growing snapshot for Casstown
Last spring frost
Apr 24
First fall frost
Oct 17
Growing season
173 days
Hardiness zone
6a
More local growing data for Casstown: nearby ZIP 45312 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Covington
Fletcher
Laura
Lockington
Ludlow Falls
Piqua
Pleasant Hill
Potsdam
Tipp City
Troy
West Milton
Climate data from the nearest NOAA station, New Carlisle, Oh (8.9 mi from Casstown). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.