Chambersburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chambersburg, a borough in Franklin County, Pennsylvania.
Today
87°F
Mostly Sunny
Mostly sunny, with a high near 87. East wind around 3 mph.
7-day forecast for Chambersburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Mostly Sunny | 3 mph E | 0% |
| Tonight | 66°F | Mostly Cloudy | 0 to 3 mph E | 10% |
| Wednesday | 85°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 1 to 5 mph E | 57% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 3 mph SE | 59% |
| Thursday | 90°F | Partly Sunny then Showers And Thunderstorms Likely | 2 to 6 mph S | 64% |
| Thursday Night | 70°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 1 to 5 mph SW | 64% |
| Friday | 89°F | Partly Sunny then Showers And Thunderstorms Likely | 0 to 5 mph SW | 58% |
| Friday Night | 69°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 3 mph SW | 58% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 1 to 5 mph W | 45% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 0 to 3 mph W | 45% |
| Sunday | 90°F | Mostly Sunny | 0 to 5 mph W | 13% |
| Sunday Night | 70°F | Partly Cloudy | 3 mph SW | 13% |
| Monday | 92°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 1 to 8 mph W | 15% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 2 to 7 mph SW | 15% |
Forecast source: National Weather Service (api.weather.gov) for Chambersburg (39.931, -77.656). Updated through the day.
Growing snapshot for Chambersburg
Last spring frost
Apr 18
First fall frost
Oct 25
Growing season
188 days
Hardiness zone
7a
More local growing data for Chambersburg: nearby ZIP 17201 weather · frost dates · planting calendar · Pennsylvania frost dates
Nearby towns & communities
Blue Ridge Summit
Fayetteville
Fort Loudon
Greencastle
Guilford
Marion
Mercersburg
Mont Alto
Orrstown
Pen Mar
Rouzerville
Scotland
State Line
Wayne Heights
Waynesboro
Climate data from the nearest NOAA station, Chambersburg 1 Ese, Pa (2 mi from Chambersburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.