Portsmouth, OH Weather & Growing Conditions
Tonight
62°F
Partly Cloudy then Widespread Fog
Widespread fog after midnight. Partly cloudy, with a low around 62. Northeast wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 62°F | Partly Cloudy then Widespread Fog | 5 mph NE | 3% |
| Saturday | 85°F | Widespread Fog then Mostly Sunny | 2 mph E | 5% |
| Saturday Night | 66°F | Chance Showers And Thunderstorms | 3 mph S | 25% |
| Sunday | 86°F | Chance Showers And Thunderstorms | 5 mph SW | 45% |
| Sunday Night | 65°F | Chance Showers And Thunderstorms | 5 mph N | 45% |
| Monday | 80°F | Chance Rain Showers then Chance Showers And Thunderstorms | 6 mph NE | 38% |
| Monday Night | 62°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 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 | 6 mph NE | 62% |
| Wednesday | 74°F | Rain Showers Likely | 6 mph NE | 62% |
| Wednesday Night | 58°F | Showers And Thunderstorms Likely | 6 mph NE | 56% |
| Thursday | 73°F | Slight Chance Rain Showers | 6 mph N | 18% |
| Thursday Night | 57°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 6 mph N | 18% |
| Friday | 73°F | Partly Sunny | 6 mph N | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Portsmouth, OH
Last spring frost
Apr 17
First fall frost
Oct 25
Growing season
191 days
Hardiness zone
7a
Explore more for Portsmouth, OH: full frost dates · planting calendar · Ohio frost dates
Climate data from the nearest NOAA station, Portsmouth-Sciotoville, Oh (2.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.