Cornwall, PA Weather & Growing Conditions
Tonight
52°F
Mostly Clear
Mostly clear, with a low around 52. Northeast wind 6 to 9 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Mostly Clear | 6 to 9 mph NE | 0% |
| Saturday | 76°F | Mostly Sunny | 7 mph E | 2% |
| Saturday Night | 61°F | Mostly Cloudy then Chance Rain Showers | 7 to 12 mph SE | 32% |
| Sunday | 76°F | Rain Showers | 9 to 13 mph S | 94% |
| Sunday Night | 60°F | Showers And Thunderstorms | 8 to 12 mph NW | 94% |
| Monday | 71°F | Chance Rain Showers | 12 mph NE | 36% |
| Monday Night | 55°F | Chance Rain Showers | 10 to 16 mph NE | 38% |
| Tuesday | 64°F | Chance Rain Showers | 16 mph NE | 49% |
| Tuesday Night | 50°F | Chance Rain Showers | 17 mph NE | 49% |
| Wednesday | 62°F | Chance Rain Showers | 17 mph NE | 44% |
| Wednesday Night | 51°F | Chance Showers And Thunderstorms | 16 mph NE | 45% |
| Thursday | 64°F | Chance Showers And Thunderstorms | 15 mph NE | 44% |
| Thursday Night | 51°F | Chance Showers And Thunderstorms | 8 to 13 mph NE | 38% |
| Friday | 68°F | Chance Rain Showers | 13 mph N | 27% |
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 (3.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.