Chambersburg, PA Weather & Growing Conditions
Tonight
50°F
Mostly Clear
Mostly clear, with a low around 50. South wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 50°F | Mostly Clear | 5 mph S | 1% |
| Wednesday | 76°F | Mostly Sunny | 2 to 12 mph S | 2% |
| Wednesday Night | 62°F | Mostly Cloudy then Rain Showers | 9 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 | 39% |
| Friday | 70°F | Chance Rain Showers | 2 mph NW | 44% |
| Friday Night | 45°F | Chance Rain Showers then Partly Cloudy | 2 mph NW | 41% |
| Saturday | 63°F | Mostly Sunny | 2 to 9 mph NW | 14% |
| Saturday Night | 37°F | Partly Cloudy | 2 to 7 mph NW | 12% |
| Sunday | 61°F | Mostly Sunny | 2 to 7 mph W | 9% |
| Sunday Night | 35°F | Partly Cloudy then Slight Chance Rain Showers | 5 mph W | 20% |
| Monday | 60°F | Slight Chance Rain Showers | 5 to 13 mph W | 22% |
| Monday Night | 35°F | Slight Chance Rain Showers | 6 mph W | 22% |
| Tuesday | 64°F | Mostly Sunny | 7 to 13 mph W | 9% |
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 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.