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
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| 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
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 Sep 19, 2026.