Port Jefferson, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Port Jefferson, a village in Shelby County, Ohio.
This Afternoon
75°F
Sunny
Sunny, with a high near 75. South wind 12 to 15 mph.
7-day forecast for Port Jefferson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Sunny | 12 to 15 mph S | 2% |
| Tonight | 62°F | Mostly Cloudy then Chance Rain Showers | 10 to 17 mph S | 54% |
| Wednesday | 68°F | Rain Showers | 16 to 21 mph S | 100% |
| Wednesday Night | 50°F | Chance Rain Showers then Mostly Cloudy | 6 to 14 mph SW | 31% |
| Thursday | 63°F | Mostly Sunny | 7 to 16 mph SW | 0% |
| Thursday Night | 45°F | Mostly Cloudy | 1 to 7 mph SW | 2% |
| Friday | 58°F | Slight Chance Light Rain | 1 to 8 mph W | 20% |
| Friday Night | 38°F | Slight Chance Light Rain then Mostly Cloudy | 7 mph NW | 20% |
| Saturday | 54°F | Partly Sunny | 8 mph NW | 13% |
| Saturday Night | 33°F | Mostly Cloudy | 1 to 5 mph W | 4% |
| Sunday | 55°F | Mostly Sunny | 1 to 12 mph W | 9% |
| Sunday Night | 34°F | Partly Cloudy | 3 to 8 mph W | 13% |
| Monday | 58°F | Mostly Sunny | 3 to 10 mph W | 13% |
| Monday Night | 37°F | Partly Cloudy | 8 mph SW | 12% |
Forecast source: National Weather Service (api.weather.gov) for Port Jefferson (40.331, -84.092). Updated through the day.
Growing snapshot for Port Jefferson
Last spring frost
Apr 27
First fall frost
Oct 20
Growing season
175 days
Hardiness zone
6a
More local growing data for Port Jefferson: nearby ZIP 45360 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Sidney 1 S, Oh (5.1 mi from Port Jefferson). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.