Portsmouth, OH Weather & Growing Conditions
Today
69°F
Rain
Rain and a slight chance of thunderstorms. Cloudy, with a high near 69. South wind around 8 mph, with gusts as high as 22 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Rain | 8 mph S | 100% |
| Tonight | 55°F | Light Rain then Mostly Cloudy | 3 to 9 mph SW | 84% |
| Thursday | 68°F | Mostly Sunny | 3 to 7 mph SW | 0% |
| Thursday Night | 46°F | Partly Cloudy | 3 mph SW | 0% |
| Friday | 65°F | Mostly Sunny | 1 to 6 mph W | 11% |
| Friday Night | 41°F | Mostly Cloudy | 5 mph NW | 11% |
| Saturday | 56°F | Mostly Sunny | 6 mph NW | 2% |
| Saturday Night | 35°F | Partly Cloudy | 3 mph NW | 0% |
| Sunday | 59°F | Mostly Sunny | 2 to 6 mph W | 2% |
| Sunday Night | 34°F | Mostly Clear | 5 mph W | 3% |
| Monday | 61°F | Sunny | 5 mph W | 3% |
| Monday Night | 36°F | Mostly Clear | 3 mph SW | 2% |
| Tuesday | 66°F | Sunny | 6 mph SW | 1% |
| Tuesday Night | 37°F | Mostly Clear | 3 mph W | 1% |
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.