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Seneca, PA Weather & Growing Conditions

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

Tonight
54°F
Partly Cloudy
Partly cloudy, with a low around 54. Northeast wind around 6 mph.

7-day forecast for Seneca

WhenTempForecastWindPrecip
Tonight 54°F Partly Cloudy 6 mph NE 4%
Saturday 72°F Partly Sunny then Slight Chance Rain Showers 6 mph E 16%
Saturday Night 61°F Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms 3 to 7 mph SE 84%
Sunday 72°F Showers And Thunderstorms 7 mph SW 91%
Sunday Night 53°F Rain Showers Likely 9 mph NE 61%
Monday 66°F Chance Rain Showers 9 mph NE 25%
Monday Night 52°F Chance Rain Showers 10 mph E 52%
Tuesday 63°F Chance Rain Showers 10 mph E 52%
Tuesday Night 50°F Showers And Thunderstorms Likely 14 mph E 61%
Wednesday 60°F Rain Showers Likely 10 to 14 mph E 61%
Wednesday Night 50°F Chance Showers And Thunderstorms 13 mph E 54%
Thursday 62°F Chance Rain Showers 7 to 10 mph E 47%
Thursday Night 50°F Chance Rain Showers 6 mph E 27%
Friday 69°F Partly Sunny then Slight Chance Rain Showers 6 mph NE 18%

Forecast source: National Weather Service (api.weather.gov) for Seneca (41.377, -79.705). Updated through the day.

Growing snapshot for Seneca

Last spring frost
May 2
First fall frost
Oct 23
Growing season
171 days
Hardiness zone
6a

More local growing data for Seneca: nearby ZIP 16346 weather · frost dates · planting calendar · Pennsylvania frost dates

Nearby towns & communities

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Climate data from the nearest NOAA station, Franklin, Pa (8.3 mi from Seneca). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.