Greencastle, PA Weather & Growing Conditions
Today
87°F
Mostly Sunny
Mostly sunny, with a high near 87. East wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Mostly Sunny | 3 mph E | 0% |
| Tonight | 67°F | Mostly Cloudy then Patchy Fog | 0 to 3 mph E | 17% |
| Wednesday | 85°F | Showers And Thunderstorms Likely | 1 to 6 mph E | 67% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 5 mph SE | 45% |
| Thursday | 90°F | Partly Sunny then Showers And Thunderstorms Likely | 2 to 6 mph S | 61% |
| Thursday Night | 70°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 61% |
| Friday | 89°F | Mostly Sunny then Showers And Thunderstorms Likely | 0 to 6 mph SW | 55% |
| Friday Night | 69°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 55% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 44% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 0 to 3 mph SW | 44% |
| Sunday | 90°F | Mostly Sunny | 0 to 5 mph W | 14% |
| Sunday Night | 70°F | Partly Cloudy | 1 to 5 mph SW | 14% |
| Monday | 91°F | Mostly Sunny | 1 to 8 mph W | 14% |
| Monday Night | 69°F | Partly Cloudy | 2 to 7 mph W | 14% |
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 Aug 4, 2026.