Chambersburg, PA Weather & Growing Conditions
Today
86°F
Mostly Sunny
Mostly sunny, with a high near 86. East wind around 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Mostly Sunny | 3 mph E | 0% |
| Tonight | 69°F | Mostly Cloudy | 0 to 3 mph E | 11% |
| Wednesday | 84°F | Slight Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 1 to 5 mph E | 58% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 3 mph SE | 58% |
| Thursday | 89°F | Mostly Cloudy then Showers And Thunderstorms Likely | 2 to 6 mph S | 64% |
| Thursday Night | 71°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 64% |
| Friday | 88°F | Partly Sunny then Showers And Thunderstorms Likely | 0 to 6 mph SW | 57% |
| Friday Night | 68°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 57% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 5 mph W | 46% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 0 to 3 mph W | 46% |
| Sunday | 90°F | Mostly Sunny | 0 to 5 mph W | 14% |
| Sunday Night | 69°F | Partly Cloudy | 3 mph SW | 14% |
| Monday | 91°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). Updated through the day.
Growing snapshot for Chambersburg, PA
Last spring frost
Apr 18
First fall frost
Oct 25
Growing season
188 days
Hardiness zone
7a
Explore more for Chambersburg, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Chambersburg 1 Ese, Pa (2.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.