Harman US

Castanea, PA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Castanea, a community in Clinton County, Pennsylvania.

This Afternoon
70°F
Slight Chance Rain Showers
A slight chance of rain showers. Partly sunny, with a high near 70. Southeast wind around 3 mph. Chance of precipitation is 20%.

7-day forecast for Castanea

WhenTempForecastWindPrecip
This Afternoon 70°F Slight Chance Rain Showers 3 mph SE 15%
Tonight 60°F Rain Showers 3 to 8 mph SE 93%
Sunday 72°F Rain Showers 7 mph S 98%
Sunday Night 52°F Chance Rain Showers then Mostly Cloudy 5 to 10 mph N 32%
Monday 67°F Partly Sunny 7 mph NE 14%
Monday Night 50°F Chance Rain Showers 8 mph NE 54%
Tuesday 61°F Chance Rain Showers 7 mph E 54%
Tuesday Night 48°F Chance Rain Showers 7 mph E 42%
Wednesday 58°F Chance Rain Showers 8 mph E 25%
Wednesday Night 47°F Slight Chance Rain Showers 7 mph E 17%
Thursday 60°F Slight Chance Rain Showers 6 mph E 18%
Thursday Night 46°F Slight Chance Rain Showers 5 mph NE 23%
Friday 64°F Chance Rain Showers 2 to 7 mph N 25%
Friday Night 48°F Chance Rain Showers 3 to 7 mph N 25%

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

Nearby towns & communities

All Pennsylvania locations ›

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 20, 2026.