Port William, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Port William, a village in Clinton County, Ohio.
Overnight
61°F
Light Rain Likely
Rain likely. Cloudy, with a low around 61. South wind around 16 mph, with gusts as high as 29 mph. Chance of precipitation is 60%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Port William
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 61°F | Light Rain Likely | 16 mph S | 63% |
| Wednesday | 66°F | Rain | 16 to 20 mph S | 99% |
| Wednesday Night | 50°F | Light Rain Likely then Mostly Cloudy | 7 to 17 mph SW | 68% |
| Thursday | 63°F | Mostly Sunny | 7 to 14 mph SW | 0% |
| Thursday Night | 43°F | Partly Cloudy | 3 to 8 mph SW | 0% |
| Friday | 58°F | Chance Light Rain | 2 to 10 mph W | 34% |
| Friday Night | 36°F | Chance Light Rain then Mostly Cloudy | 7 to 10 mph NW | 34% |
| Saturday | 53°F | Partly Sunny | 7 to 10 mph NW | 4% |
| Saturday Night | 32°F | Partly Cloudy | 2 to 7 mph W | 2% |
| Sunday | 56°F | Mostly Sunny | 3 to 12 mph W | 3% |
| Sunday Night | 32°F | Mostly Clear | 5 to 9 mph W | 3% |
| Monday | 59°F | Sunny | 3 to 9 mph W | 3% |
| Monday Night | 35°F | Mostly Clear | 7 mph SW | 3% |
| Tuesday | 63°F | Sunny | 10 mph W | 1% |
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 Nov 4, 2026.