Seneca, PA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Seneca, a community in Venango County, Pennsylvania.
This Afternoon
75°F
Sunny
Sunny, with a high near 75. South wind 2 to 12 mph.
7-day forecast for Seneca
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Sunny | 2 to 12 mph S | 2% |
| Tonight | 52°F | Mostly Clear | 3 to 7 mph SE | 3% |
| Wednesday | 74°F | Partly Sunny | 6 to 9 mph S | 9% |
| Wednesday Night | 59°F | Light Rain | 8 to 12 mph S | 99% |
| Thursday | 68°F | Chance Light Rain | 6 to 10 mph SW | 27% |
| Thursday Night | 46°F | Partly Cloudy | 1 to 5 mph SW | 4% |
| Friday | 62°F | Partly Sunny then Slight Chance Light Rain | 1 to 5 mph W | 19% |
| Friday Night | 42°F | Chance Light Rain | 5 mph NW | 31% |
| Saturday | 53°F | Chance Light Rain | 5 to 9 mph W | 38% |
| Saturday Night | 36°F | Chance Light Rain then Mostly Cloudy | 6 mph W | 38% |
| Sunday | 53°F | Partly Sunny then Slight Chance Light Rain | 3 to 8 mph SW | 18% |
| Sunday Night | 34°F | Chance Light Rain | 7 mph W | 27% |
| Monday | 54°F | Chance Light Rain | 7 to 10 mph W | 35% |
| Monday Night | 35°F | Chance Light Rain | 6 to 9 mph SW | 35% |
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
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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 Nov 3, 2026.