Smithfield, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Smithfield, a borough in Fayette County, Pennsylvania.
Today
85°F
Sunny
Sunny, with a high near 85. Northeast wind around 3 mph.
7-day forecast for Smithfield
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 3 mph NE | 0% |
| Tonight | 68°F | Partly Cloudy | 1 to 5 mph SE | 2% |
| Wednesday | 85°F | Mostly Sunny then Chance Showers And Thunderstorms | 1 to 5 mph S | 28% |
| Wednesday Night | 68°F | Chance Showers And Thunderstorms | 1 to 5 mph S | 40% |
| Thursday | 84°F | Showers And Thunderstorms | 2 to 7 mph SW | 84% |
| Thursday Night | 68°F | Showers And Thunderstorms | 5 mph S | 84% |
| Friday | 83°F | Showers And Thunderstorms | 3 to 8 mph SW | 82% |
| Friday Night | 67°F | Showers And Thunderstorms | 6 mph SW | 82% |
| Saturday | 82°F | Showers And Thunderstorms Likely | 5 to 8 mph SW | 68% |
| Saturday Night | 67°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 2 to 6 mph SW | 68% |
| Sunday | 84°F | Chance Showers And Thunderstorms | 5 to 8 mph SW | 27% |
| Sunday Night | 69°F | Chance Showers And Thunderstorms | 6 mph SW | 27% |
| Monday | 85°F | Chance Showers And Thunderstorms | 7 to 10 mph SW | 35% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 3 to 8 mph SW | 48% |
Forecast source: National Weather Service (api.weather.gov) for Smithfield (39.802, -79.809). Updated through the day.
Growing snapshot for Smithfield
Last spring frost
Apr 25
First fall frost
Oct 24
Growing season
181 days
Hardiness zone
6b
More local growing data for Smithfield: nearby ZIP 15478 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Allison
Brownsville
Buffington
Centerville
Chalkhill
Coal Center
Connellsville
Dawson
Deer Lake
Dunbar
East Uniontown
Edenborn
Elco
Everson
Fairchance
Farmington
Greensboro
Grindstone
Hiller
Hopwood
Leith-Hatfield
Lemont Furnace
Markleysburg
Masontown
New Salem
Newell
Ohiopyle
Oliver
Perryopolis
Point Marion
Climate data from the nearest NOAA station, Lake Lynn, Wv (5.4 mi from Smithfield). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.