St. Clairsville, PA Weather & Growing Conditions
Today
74°F
Partly Sunny
Partly sunny, with a high near 74. South wind 2 to 12 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Partly Sunny | 2 to 12 mph S | 1% |
| Tonight | 57°F | Light Rain | 6 to 9 mph S | 90% |
| Thursday | 72°F | Chance Light Rain | 5 to 9 mph SW | 53% |
| Thursday Night | 47°F | Mostly Cloudy | 0 to 3 mph W | 5% |
| Friday | 64°F | Partly Sunny | 0 to 3 mph W | 13% |
| Friday Night | 41°F | Partly Cloudy | 3 mph W | 10% |
| Saturday | 52°F | Chance Light Rain | 5 to 13 mph W | 25% |
| Saturday Night | 34°F | Chance Light Rain then Mostly Cloudy | 14 mph W | 25% |
| Sunday | 54°F | Partly Sunny | 13 mph W | 11% |
| Sunday Night | 32°F | Partly Cloudy | 13 mph W | 6% |
| Monday | 54°F | Mostly Sunny | 10 to 15 mph W | 9% |
| Monday Night | 32°F | Mostly Clear | 6 to 10 mph W | 8% |
| Tuesday | 59°F | Mostly Sunny | 7 to 15 mph W | 3% |
| Tuesday Night | 33°F | Partly Cloudy | 5 to 10 mph W | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for St. Clairsville, PA
Last spring frost
Apr 29
First fall frost
Oct 13
Growing season
167 days
Hardiness zone
6b
Explore more for St. Clairsville, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Wolfsburg, Pa (9.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.