Greencastle, PA Weather & Growing Conditions
This Afternoon
83°F
Partly Sunny
Partly sunny, with a high near 83. North wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Partly Sunny | 7 mph N | 0% |
| Tonight | 55°F | Partly Cloudy | 7 mph N | 0% |
| Saturday | 77°F | Mostly Sunny | 3 to 7 mph NE | 3% |
| Saturday Night | 65°F | Chance Rain Showers | 3 to 9 mph SE | 32% |
| Sunday | 81°F | Showers And Thunderstorms | 6 to 10 mph S | 85% |
| Sunday Night | 61°F | Showers And Thunderstorms | 3 to 10 mph W | 85% |
| Monday | 71°F | Chance Rain Showers | 10 mph NE | 40% |
| Monday Night | 57°F | Rain Showers Likely | 9 mph NE | 63% |
| Tuesday | 63°F | Rain Showers | 10 mph NE | 75% |
| Tuesday Night | 52°F | Rain Showers | 10 mph NE | 75% |
| Wednesday | 60°F | Rain Showers Likely | 10 mph NE | 59% |
| Wednesday Night | 52°F | Showers And Thunderstorms Likely | 9 mph NE | 55% |
| Thursday | 63°F | Chance Showers And Thunderstorms | 9 mph NE | 51% |
| Thursday Night | 52°F | Chance Rain Showers | 6 mph N | 36% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Greencastle, PA
Last spring frost
Apr 7
First fall frost
Nov 4
Growing season
209 days
Hardiness zone
7a
Explore more for Greencastle, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Hagerstown Washington Co Ap, Md (5.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.