Grindstone, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grindstone, a community in Fayette County, Pennsylvania.
Today
85°F
Areas Of Fog then Sunny
Areas of fog before 9am. Sunny, with a high near 85. East wind 1 to 5 mph.
7-day forecast for Grindstone
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Areas Of Fog then Sunny | 1 to 5 mph E | 0% |
| Tonight | 67°F | Partly Cloudy | 1 to 5 mph SE | 1% |
| Wednesday | 86°F | Mostly Sunny then Isolated Showers And Thunderstorms | 1 to 5 mph S | 19% |
| Wednesday Night | 68°F | Scattered Showers And Thunderstorms | 5 mph S | 46% |
| Thursday | 84°F | Showers And Thunderstorms | 3 to 8 mph SW | 78% |
| Thursday Night | 68°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 mph SW | 78% |
| Friday | 84°F | Showers And Thunderstorms | 5 to 8 mph SW | 82% |
| Friday Night | 66°F | Showers And Thunderstorms | 6 mph SW | 82% |
| Saturday | 82°F | Showers And Thunderstorms Likely | 8 mph SW | 59% |
| Saturday Night | 66°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 6 mph SW | 59% |
| Sunday | 85°F | Chance Showers And Thunderstorms | 5 to 8 mph SW | 25% |
| Sunday Night | 68°F | Chance Showers And Thunderstorms | 7 mph SW | 25% |
| Monday | 86°F | Chance Showers And Thunderstorms | 10 mph SW | 36% |
| Monday Night | 68°F | Chance Showers And Thunderstorms | 5 to 8 mph SW | 48% |
Forecast source: National Weather Service (api.weather.gov) for Grindstone (40.022, -79.823). Updated through the day.
Growing snapshot for Grindstone
Last spring frost
Apr 13
First fall frost
Nov 5
Growing season
205 days
Hardiness zone
6b
More local growing data for Grindstone: nearby ZIP 15442 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Charleroi Lock 4, Pa (9.3 mi from Grindstone). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.