Castanea, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Castanea, a community in Clinton County, Pennsylvania.
Today
69°F
Partly Sunny
Partly sunny, with a high near 69. East wind around 3 mph.
7-day forecast for Castanea
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 69°F | Partly Sunny | 3 mph E | 1% |
| Tonight | 59°F | Rain Showers | 3 to 8 mph SE | 93% |
| Sunday | 68°F | Rain Showers | 5 to 8 mph S | 93% |
| Sunday Night | 51°F | Chance Rain Showers then Mostly Cloudy | 6 to 13 mph NW | 38% |
| Monday | 64°F | Mostly Cloudy | 8 mph NE | 3% |
| Monday Night | 48°F | Chance Rain Showers | 9 mph NE | 46% |
| Tuesday | 58°F | Chance Rain Showers | 7 mph E | 51% |
| Tuesday Night | 46°F | Chance Rain Showers | 8 mph E | 43% |
| Wednesday | 58°F | Chance Rain Showers | 8 mph E | 41% |
| Wednesday Night | 47°F | Chance Rain Showers | 5 to 8 mph E | 36% |
| Thursday | 60°F | Chance Rain Showers | 6 mph NE | 38% |
| Thursday Night | 47°F | Chance Rain Showers | 5 mph NE | 34% |
| Friday | 64°F | Chance Rain Showers | 3 to 7 mph N | 29% |
| Friday Night | 47°F | Slight Chance Rain Showers then Mostly Cloudy | 3 to 7 mph N | 23% |
Forecast source: National Weather Service (api.weather.gov) for Castanea (41.117, -77.427). Updated through the day.
Growing snapshot for Castanea
Last spring frost
Apr 30
First fall frost
Oct 20
Growing season
173 days
Hardiness zone
6b
More local growing data for Castanea: nearby ZIP 17750 weather · frost dates · planting calendar · Pennsylvania frost dates
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Climate data from the nearest NOAA station, Lock Haven Sewage Plt, Pa (5.7 mi from Castanea). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.