Seneca, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Seneca, a community in Venango County, Pennsylvania.
Today
83°F
Sunny
Sunny, with a high near 83. Southeast wind around 2 mph.
7-day forecast for Seneca
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 83°F | Sunny | 2 mph SE | 0% |
| Tonight | 62°F | Mostly Clear | 1 to 5 mph SE | 0% |
| Wednesday | 85°F | Partly Sunny then Scattered Showers And Thunderstorms | 5 mph S | 28% |
| Wednesday Night | 66°F | Scattered Showers And Thunderstorms | 3 mph SE | 50% |
| Thursday | 84°F | Showers And Thunderstorms Likely | 6 mph S | 66% |
| Thursday Night | 66°F | Showers And Thunderstorms Likely | 3 mph SW | 66% |
| Friday | 82°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 2 to 6 mph SW | 83% |
| Friday Night | 64°F | Showers And Thunderstorms then Chance Showers And Thunderstorms | 3 mph SW | 83% |
| Saturday | 82°F | Slight Chance Rain Showers then Chance Showers And Thunderstorms | 2 to 6 mph SW | 46% |
| Saturday Night | 64°F | Chance Showers And Thunderstorms | 5 mph SW | 46% |
| Sunday | 85°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 3 to 7 mph SW | 23% |
| Sunday Night | 67°F | Slight Chance Showers And Thunderstorms then Chance Showers And Thunderstorms | 6 mph SW | 34% |
| Monday | 84°F | Chance Rain Showers | 6 to 9 mph W | 46% |
| Monday Night | 65°F | Chance Showers And Thunderstorms | 3 to 7 mph W | 52% |
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
Clintonville
Cooperstown
Emlenton
Franklin
Hannasville
Hasson Heights
Kennerdell
Oil City
Pleasantville
Polk
Rouseville
Sugarcreek
Titusville
Utica
Woodland Heights
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 Aug 4, 2026.