Grassflat, PA Weather & Growing Conditions
Tonight
49°F
Partly Cloudy then Patchy Fog
Patchy fog after 2am. Partly cloudy, with a low around 49. Northeast wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 49°F | Partly Cloudy then Patchy Fog | 3 mph NE | 1% |
| Saturday | 70°F | Patchy Fog then Partly Sunny | 5 mph E | 4% |
| Saturday Night | 58°F | Mostly Cloudy then Rain Showers | 3 to 7 mph SE | 76% |
| Sunday | 71°F | Showers And Thunderstorms | 7 mph SW | 98% |
| Sunday Night | 52°F | Showers And Thunderstorms | 6 mph N | 81% |
| Monday | 64°F | Chance Rain Showers | 7 mph NE | 28% |
| Monday Night | 49°F | Rain Showers Likely | 8 mph E | 59% |
| Tuesday | 58°F | Rain Showers Likely | 8 mph E | 67% |
| Tuesday Night | 46°F | Rain Showers Likely | 9 mph E | 60% |
| Wednesday | 56°F | Chance Rain Showers | 9 mph E | 54% |
| Wednesday Night | 46°F | Chance Showers And Thunderstorms | 8 mph E | 51% |
| Thursday | 59°F | Chance Showers And Thunderstorms | 6 mph E | 51% |
| Thursday Night | 47°F | Chance Rain Showers | 5 mph NE | 36% |
| Friday | 66°F | Slight Chance Rain Showers then Partly Sunny | 2 to 6 mph N | 22% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Grassflat, PA
Last spring frost
May 21
First fall frost
Sep 27
Growing season
130 days
Hardiness zone
6a
Explore more for Grassflat, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Clarence, Pa (9.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.