Chambersburg, PA Weather & Growing Conditions
This Afternoon
76°F
Mostly Sunny
Mostly sunny, with a high near 76. South wind around 13 mph, with gusts as high as 21 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Mostly Sunny | 13 mph S | 1% |
| Tonight | 61°F | Light Rain | 7 to 10 mph S | 90% |
| Thursday | 76°F | Light Rain Likely | 3 to 10 mph S | 66% |
| Thursday Night | 54°F | Chance Light Rain then Mostly Cloudy | 0 to 3 mph SW | 32% |
| Friday | 70°F | Slight Chance Light Rain | 2 mph NW | 18% |
| Friday Night | 44°F | Partly Cloudy | 3 mph NW | 12% |
| Saturday | 60°F | Mostly Sunny | 3 to 12 mph W | 12% |
| Saturday Night | 36°F | Partly Cloudy | 6 to 10 mph W | 12% |
| Sunday | 60°F | Mostly Sunny | 7 to 10 mph NW | 4% |
| Sunday Night | 34°F | Mostly Clear | 7 mph W | 4% |
| Monday | 59°F | Sunny | 6 to 13 mph W | 4% |
| Monday Night | 33°F | Mostly Clear | 2 to 7 mph W | 4% |
| Tuesday | 65°F | Sunny | 5 to 10 mph SW | 3% |
| Tuesday Night | 34°F | Mostly Clear | 6 mph W | 0% |
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 Nov 4, 2026.