Chambersburg, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Chambersburg, a borough in Franklin County, Pennsylvania.
This Afternoon
73°F
Mostly Sunny
Mostly sunny, with a high near 73. South wind around 5 mph.
7-day forecast for Chambersburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Mostly Sunny | 5 mph S | 1% |
| Tonight | 51°F | Mostly Clear | 5 mph S | 1% |
| Wednesday | 76°F | Mostly Sunny | 2 to 12 mph SE | 2% |
| Wednesday Night | 62°F | Mostly Cloudy then Rain Showers | 7 to 10 mph S | 90% |
| Thursday | 75°F | Rain Showers | 3 to 10 mph S | 77% |
| Thursday Night | 56°F | Chance Rain Showers | 0 to 3 mph W | 40% |
| Friday | 70°F | Chance Rain Showers | 2 mph NW | 45% |
| Friday Night | 46°F | Chance Rain Showers then Partly Cloudy | 2 mph NW | 41% |
| Saturday | 63°F | Mostly Sunny | 2 to 10 mph NW | 14% |
| Saturday Night | 37°F | Partly Cloudy | 2 to 7 mph NW | 13% |
| Sunday | 61°F | Mostly Sunny | 2 to 7 mph W | 8% |
| Sunday Night | 35°F | Partly Cloudy then Slight Chance Rain Showers | 6 mph W | 21% |
| Monday | 60°F | Slight Chance Rain Showers | 6 to 13 mph W | 22% |
| Monday Night | 35°F | Slight Chance Rain Showers | 6 mph W | 22% |
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 Nov 4, 2026.