Port William, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Port William, a village in Clinton County, Ohio.
Today
84°F
Sunny
Sunny, with a high near 84. Northeast wind around 5 mph.
7-day forecast for Port William
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Sunny | 5 mph NE | 0% |
| Tonight | 64°F | Mostly Clear | 3 mph NE | 2% |
| Wednesday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 3 mph N | 30% |
| Wednesday Night | 66°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph SW | 22% |
| Thursday | 86°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 9 mph SW | 42% |
| Thursday Night | 67°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 to 7 mph SW | 58% |
| Friday | 84°F | Showers And Thunderstorms Likely | 5 to 9 mph SW | 68% |
| Friday Night | 66°F | Showers And Thunderstorms Likely | 3 to 8 mph SW | 68% |
| Saturday | 84°F | Chance Showers And Thunderstorms | 3 to 9 mph SW | 31% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms then Partly Cloudy | 3 to 7 mph SW | 31% |
| Sunday | 86°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 5 to 10 mph SW | 18% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 8 mph SW | 18% |
| Monday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 8 to 13 mph SW | 30% |
| Monday Night | 69°F | Chance Showers And Thunderstorms | 6 to 9 mph SW | 30% |
Forecast source: National Weather Service (api.weather.gov) for Port William (39.552, -83.786). Updated through the day.
Growing snapshot for Port William
Last spring frost
Apr 20
First fall frost
Oct 20
Growing season
180 days
More local growing data for Port William: nearby ZIP 45164 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Wilmington 3 N, Oh (4.7 mi from Port William). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.