Grindstone, PA Weather & Growing Conditions
Today
85°F
Sunny
Sunny, with a high near 85. East wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Sunny | 3 mph E | 0% |
| Tonight | 67°F | Partly Cloudy | 1 to 5 mph E | 2% |
| Wednesday | 86°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 | 80% |
| Thursday Night | 67°F | Showers And Thunderstorms | 5 mph SW | 80% |
| Friday | 84°F | Showers And Thunderstorms | 3 to 8 mph SW | 82% |
| Friday Night | 66°F | Showers And Thunderstorms | 6 mph SW | 82% |
| Saturday | 83°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). Updated through the day.
Growing snapshot for Grindstone, PA
Last spring frost
Apr 13
First fall frost
Nov 5
Growing season
205 days
Hardiness zone
6b
Explore more for Grindstone, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Charleroi Lock 4, Pa (9.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.