Portsmouth, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Portsmouth, a city in Scioto County, Ohio.
This Afternoon
83°F
Mostly Cloudy
Mostly cloudy, with a high near 83. North wind around 6 mph.
7-day forecast for Portsmouth
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Mostly Cloudy | 6 mph N | 11% |
| Tonight | 62°F | Partly Cloudy then Widespread Fog | 1 to 6 mph NE | 4% |
| Saturday | 85°F | Widespread Fog then Mostly Sunny | 1 mph E | 5% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 2 mph S | 25% |
| Sunday | 86°F | Chance Showers And Thunderstorms | 1 to 5 mph SW | 44% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms | 3 mph N | 44% |
| Monday | 80°F | Chance Rain Showers then Chance Showers And Thunderstorms | 2 to 6 mph NE | 39% |
| Monday Night | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 2 to 6 mph NE | 58% |
| Tuesday | 76°F | Chance Showers And Thunderstorms | 6 mph NE | 52% |
| Tuesday Night | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 2 to 6 mph NE | 61% |
| Wednesday | 74°F | Rain Showers Likely | 6 mph NE | 61% |
| Wednesday Night | 57°F | Showers And Thunderstorms Likely | 2 to 6 mph NE | 56% |
| Thursday | 74°F | Slight Chance Rain Showers | 6 mph N | 18% |
| Thursday Night | 56°F | Slight Chance Rain Showers then Mostly Cloudy | 1 to 6 mph N | 18% |
Forecast source: National Weather Service (api.weather.gov) for Portsmouth (38.753, -82.949). Updated through the day.
Growing snapshot for Portsmouth
Last spring frost
Apr 17
First fall frost
Oct 25
Growing season
191 days
Hardiness zone
7a
More local growing data for Portsmouth: nearby ZIP 45662 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Clarktown
Franklin Furnace
Friendship
Lucasville
McDermott
Minford
New Boston
Otway
Rarden
Rosemount
Sciotodale
South Webster
Wheelersburg
Climate data from the nearest NOAA station, Portsmouth-Sciotoville, Oh (2.8 mi from Portsmouth). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.