Portsmouth, OH Weather & Growing Conditions
Tonight
59°F
Partly Cloudy
Partly cloudy, with a low around 59. Southeast wind 3 to 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 59°F | Partly Cloudy | 3 to 7 mph SE | 12% |
| Wednesday | 69°F | Showers And Thunderstorms | 8 mph SE | 95% |
| Wednesday Night | 56°F | Showers And Thunderstorms then Mostly Cloudy | 3 to 9 mph SW | 100% |
| Thursday | 71°F | Mostly Sunny | 3 to 7 mph SW | 1% |
| Thursday Night | 47°F | Partly Cloudy | 3 mph SW | 1% |
| Friday | 67°F | Mostly Sunny | 1 to 6 mph W | 6% |
| Friday Night | 43°F | Mostly Cloudy | 5 mph NW | 12% |
| Saturday | 59°F | Mostly Sunny | 5 mph NW | 12% |
| Saturday Night | 37°F | Partly Cloudy | 2 mph NW | 10% |
| Sunday | 60°F | Mostly Sunny | 1 to 5 mph W | 6% |
| Sunday Night | 36°F | Partly Cloudy then Slight Chance Light Rain | 3 mph W | 15% |
| Monday | 62°F | Slight Chance Light Rain then Sunny | 6 mph W | 15% |
| Monday Night | 38°F | Mostly Clear | 5 mph W | 13% |
| Tuesday | 65°F | Sunny | 7 mph SW | 4% |
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 Nov 4, 2026.