Grindstone, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grindstone, a community in Fayette County, Pennsylvania.
This Afternoon
78°F
Sunny
Sunny. High near 78, with temperatures falling to around 71 in the afternoon. South wind around 5 mph.
7-day forecast for Grindstone
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Sunny | 5 mph S | 1% |
| Tonight | 52°F | Mostly Clear | 5 mph SE | 2% |
| Wednesday | 77°F | Partly Sunny | 2 to 7 mph S | 7% |
| Wednesday Night | 61°F | Light Rain | 7 mph S | 99% |
| Thursday | 71°F | Chance Light Rain | 6 to 12 mph SW | 40% |
| Thursday Night | 50°F | Mostly Cloudy | 1 to 5 mph SW | 13% |
| Friday | 66°F | Partly Sunny then Slight Chance Light Rain | 1 to 6 mph W | 18% |
| Friday Night | 44°F | Chance Light Rain | 5 mph NW | 31% |
| Saturday | 55°F | Chance Light Rain | 5 to 10 mph W | 32% |
| Saturday Night | 37°F | Chance Light Rain | 2 to 7 mph W | 32% |
| Sunday | 56°F | Partly Sunny then Slight Chance Light Rain | 3 to 9 mph SW | 16% |
| Sunday Night | 35°F | Chance Light Rain | 8 mph SW | 26% |
| Monday | 56°F | Chance Light Rain | 8 to 13 mph W | 33% |
| Monday Night | 36°F | Chance Light Rain | 7 to 12 mph SW | 33% |
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 Nov 3, 2026.