Seneca, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Seneca, a community in Venango County, Pennsylvania.
Today
72°F
Slight Chance Rain Showers then Partly Sunny
A slight chance of rain showers before noon. Partly sunny, with a high near 72. Southeast wind around 6 mph. Chance of precipitation is 20%.
7-day forecast for Seneca
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Slight Chance Rain Showers then Partly Sunny | 6 mph SE | 16% |
| Tonight | 60°F | Showers And Thunderstorms | 7 mph SE | 88% |
| Sunday | 72°F | Showers And Thunderstorms | 7 mph SW | 93% |
| Sunday Night | 49°F | Slight Chance Rain Showers then Mostly Cloudy | 9 mph NE | 24% |
| Monday | 66°F | Mostly Cloudy | 9 mph NE | 12% |
| Monday Night | 48°F | Chance Rain Showers | 7 to 12 mph E | 47% |
| Tuesday | 60°F | Chance Rain Showers | 12 mph E | 48% |
| Tuesday Night | 47°F | Rain Showers Likely | 12 to 15 mph E | 56% |
| Wednesday | 58°F | Rain Showers Likely | 12 to 15 mph E | 56% |
| Wednesday Night | 47°F | Showers And Thunderstorms Likely | 12 mph E | 58% |
| Thursday | 63°F | Showers And Thunderstorms Likely | 7 to 10 mph E | 58% |
| Thursday Night | 47°F | Chance Showers And Thunderstorms | 7 mph E | 25% |
| Friday | 67°F | Slight Chance Rain Showers | 7 mph NE | 17% |
| Friday Night | 46°F | Slight Chance Rain Showers then Partly Cloudy | 7 mph NE | 16% |
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.