Grindstone, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grindstone, a community in Fayette County, Pennsylvania.
Overnight
59°F
Patchy Fog
Patchy fog. Partly cloudy, with a low around 59. North wind around 2 mph.
7-day forecast for Grindstone
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 59°F | Patchy Fog | 2 mph N | 1% |
| Saturday | 80°F | Partly Sunny | 3 mph E | 3% |
| Saturday Night | 64°F | Chance Rain Showers | 6 mph SE | 45% |
| Sunday | 78°F | Showers And Thunderstorms | 9 mph SW | 95% |
| Sunday Night | 57°F | Showers And Thunderstorms | 5 to 9 mph N | 88% |
| Monday | 68°F | Chance Rain Showers | 9 mph NE | 43% |
| Monday Night | 55°F | Showers And Thunderstorms Likely | 9 mph E | 73% |
| Tuesday | 64°F | Showers And Thunderstorms Likely | 9 to 14 mph E | 73% |
| Tuesday Night | 51°F | Showers And Thunderstorms Likely | 14 mph E | 64% |
| Wednesday | 61°F | Rain Showers Likely | 13 mph E | 64% |
| Wednesday Night | 51°F | Showers And Thunderstorms Likely | 7 to 12 mph E | 56% |
| Thursday | 66°F | Rain Showers Likely | 8 mph E | 56% |
| Thursday Night | 50°F | Chance Showers And Thunderstorms | 3 to 8 mph NE | 38% |
| Friday | 68°F | Partly Sunny then Slight Chance Rain Showers | 3 to 8 mph NE | 22% |
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 Sep 19, 2026.