St. Clairsville, OH Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for St. Clairsville, a city in Belmont County, Ohio.
This Afternoon
77°F
Mostly Sunny
Mostly sunny, with a high near 77. North wind around 7 mph.
7-day forecast for St. Clairsville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Mostly Sunny | 7 mph N | 10% |
| Tonight | 58°F | Mostly Clear | 7 mph NE | 10% |
| Saturday | 81°F | Mostly Sunny | 5 mph E | 12% |
| Saturday Night | 66°F | Partly Cloudy then Chance Showers And Thunderstorms | 2 to 8 mph S | 61% |
| Sunday | 79°F | Showers And Thunderstorms | 8 mph SW | 93% |
| Sunday Night | 61°F | Showers And Thunderstorms | 6 to 9 mph N | 93% |
| Monday | 70°F | Chance Rain Showers | 10 mph NE | 45% |
| Monday Night | 59°F | Chance Showers And Thunderstorms | 12 mph NE | 58% |
| Tuesday | 69°F | Showers And Thunderstorms Likely | 13 mph NE | 64% |
| Tuesday Night | 57°F | Showers And Thunderstorms Likely | 15 mph E | 72% |
| Wednesday | 66°F | Showers And Thunderstorms Likely | 14 mph E | 72% |
| Wednesday Night | 54°F | Showers And Thunderstorms Likely | 9 to 13 mph E | 63% |
| Thursday | 67°F | Chance Rain Showers | 10 mph E | 40% |
| Thursday Night | 54°F | Chance Rain Showers then Mostly Cloudy | 7 mph NE | 30% |
Forecast source: National Weather Service (api.weather.gov) for St. Clairsville (40.078, -80.899). Updated through the day.
Growing snapshot for St. Clairsville
Last spring frost
Apr 20
First fall frost
Oct 29
Growing season
192 days
Hardiness zone
6b
More local growing data for St. Clairsville: nearby ZIP 43950 weather · frost dates · planting calendar · Ohio frost dates
Nearby towns & communities
Bannock
Barnesville
Belmont
Bethesda
Blaine
Bridgeport
Brookside
Flushing
Glencoe
Holloway
Lafferty
Lansing
Lloydsville
Martins Ferry
Morristown
Neffs
Powhatan Point
Wolfhurst
Climate data from the nearest NOAA station, Wheeling, Wv (10.7 mi from St. Clairsville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.