Chambersburg, PA Weather & Growing Conditions
Overnight
54°F
Mostly Clear
Mostly clear, with a low around 54. Northeast wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 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 9 mph SE | 36% |
| Sunday | 80°F | Showers And Thunderstorms | 6 to 10 mph S | 90% |
| Sunday Night | 60°F | Showers And Thunderstorms | 2 to 9 mph NW | 90% |
| Monday | 71°F | Chance Rain Showers | 9 mph NE | 38% |
| Monday Night | 56°F | Rain Showers Likely | 9 mph NE | 64% |
| Tuesday | 63°F | Rain Showers Likely | 10 mph NE | 74% |
| Tuesday Night | 51°F | Rain Showers Likely | 10 mph NE | 74% |
| Wednesday | 60°F | Rain Showers Likely | 10 mph NE | 58% |
| Wednesday Night | 51°F | Showers And Thunderstorms Likely | 9 mph NE | 55% |
| Thursday | 63°F | Chance Showers And Thunderstorms | 9 mph NE | 52% |
| Thursday Night | 51°F | Chance Rain Showers | 6 mph N | 38% |
| Friday | 68°F | Chance Rain Showers | 7 mph N | 25% |
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 Sep 19, 2026.