Cornwall, PA Weather & Growing Conditions
Tonight
51°F
Mostly Clear
Mostly clear, with a low around 51. South wind around 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Mostly Clear | 6 mph S | 0% |
| Wednesday | 74°F | Mostly Sunny | 2 to 13 mph S | 0% |
| Wednesday Night | 60°F | Mostly Cloudy then Chance Rain Showers | 12 mph S | 51% |
| Thursday | 72°F | Rain Showers | 8 to 12 mph S | 89% |
| Thursday Night | 60°F | Rain Showers | 2 to 8 mph SW | 76% |
| Friday | 69°F | Rain Showers Likely | 5 mph NW | 63% |
| Friday Night | 50°F | Chance Rain Showers | 6 mph NW | 54% |
| Saturday | 63°F | Slight Chance Rain Showers | 6 to 13 mph NW | 16% |
| Saturday Night | 42°F | Slight Chance Rain Showers then Partly Cloudy | 8 to 12 mph NW | 16% |
| Sunday | 59°F | Mostly Sunny | 7 to 10 mph W | 9% |
| Sunday Night | 40°F | Slight Chance Rain Showers | 10 mph W | 22% |
| Monday | 59°F | Slight Chance Rain Showers | 10 to 17 mph W | 22% |
| Monday Night | 38°F | Slight Chance Rain Showers | 8 to 14 mph W | 20% |
| Tuesday | 62°F | Slight Chance Rain Showers then Sunny | 9 to 17 mph W | 15% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Cornwall, PA
Last spring frost
Apr 20
First fall frost
Oct 25
Growing season
185 days
Hardiness zone
7a
Explore more for Cornwall, PA: full frost dates · planting calendar · Pennsylvania frost dates
Climate data from the nearest NOAA station, Lebanon 2 W, Pa (5.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.