Portsmouth, OH Weather & Growing Conditions
Today
87°F
Sunny
Sunny, with a high near 87. Northeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Sunny | 3 mph NE | 2% |
| Tonight | 67°F | Partly Cloudy | 2 mph NE | 7% |
| Wednesday | 87°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 mph S | 54% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms | 2 mph S | 36% |
| Thursday | 86°F | Showers And Thunderstorms Likely | 5 mph SW | 55% |
| Thursday Night | 68°F | Showers And Thunderstorms Likely | 3 mph S | 55% |
| Friday | 85°F | Showers And Thunderstorms Likely | 5 mph SW | 74% |
| Friday Night | 67°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 3 mph SW | 74% |
| Saturday | 85°F | Chance Showers And Thunderstorms | 5 mph SW | 41% |
| Saturday Night | 67°F | Chance Showers And Thunderstorms | 3 mph SW | 41% |
| Sunday | 87°F | Slight Chance Showers And Thunderstorms | 1 to 5 mph SW | 20% |
| Sunday Night | 69°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 3 mph SW | 20% |
| Monday | 88°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 6 mph SW | 20% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 1 to 5 mph SW | 27% |
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 Aug 4, 2026.