Chambersburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chambersburg, a borough in Franklin County, Pennsylvania.
This Afternoon
82°F
Partly Sunny
Partly sunny, with a high near 82. North wind around 6 mph.
7-day forecast for Chambersburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 82°F | Partly Sunny | 6 mph N | 3% |
| Tonight | 54°F | Mostly Clear | 6 mph NE | 0% |
| Saturday | 77°F | Mostly Sunny | 2 to 6 mph E | 3% |
| Saturday Night | 64°F | Mostly Cloudy then Chance Rain Showers | 3 to 8 mph SE | 37% |
| Sunday | 79°F | Showers And Thunderstorms | 6 to 9 mph S | 90% |
| Sunday Night | 59°F | Showers And Thunderstorms | 2 to 8 mph NW | 90% |
| Monday | 70°F | Chance Rain Showers | 8 mph NE | 38% |
| Monday Night | 56°F | Rain Showers Likely | 6 to 9 mph NE | 63% |
| Tuesday | 63°F | Rain Showers Likely | 10 mph NE | 73% |
| Tuesday Night | 51°F | Rain Showers Likely | 10 mph NE | 73% |
| Wednesday | 60°F | Rain Showers Likely | 10 mph NE | 58% |
| Wednesday Night | 52°F | Chance Showers And Thunderstorms | 6 to 9 mph NE | 54% |
| Thursday | 63°F | Chance Showers And Thunderstorms | 6 to 9 mph NE | 52% |
| Thursday Night | 51°F | Chance Rain Showers | 6 mph N | 39% |
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 Sep 18, 2026.