Seneca, SC Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Seneca, a city in Oconee County, South Carolina.
This Afternoon
70°F
Light Rain
Rain and a chance of thunderstorms before 5pm, then rain and a chance of thunderstorms and patchy fog. Cloudy, with a high near 70. East northeast wind around 3 mph. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Seneca
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Light Rain | 3 mph ENE | 89% |
| Tonight | 63°F | Light Rain | 3 mph SE | 97% |
| Thursday | 76°F | Patchy Fog then Partly Sunny | 2 to 6 mph SW | 14% |
| Thursday Night | 56°F | Mostly Cloudy | 2 mph W | 10% |
| Friday | 75°F | Mostly Sunny | 2 mph WSW | 6% |
| Friday Night | 48°F | Mostly Clear | 2 mph NW | 1% |
| Saturday | 70°F | Sunny | 1 mph E | 0% |
| Saturday Night | 43°F | Mostly Clear | 2 mph NE | 0% |
| Sunday | 68°F | Sunny | 2 mph SSE | 0% |
| Sunday Night | 41°F | Mostly Clear | 1 mph NNW | 0% |
| Monday | 70°F | Sunny | 2 mph NNE | 2% |
| Monday Night | 42°F | Mostly Clear | 0 mph | 3% |
| Tuesday | 70°F | Mostly Sunny | 0 to 3 mph SE | 5% |
| Tuesday Night | 45°F | Partly Cloudy | 1 mph WNW | 5% |
Forecast source: National Weather Service (api.weather.gov) for Seneca (34.681, -82.966). Updated through the day.
Growing snapshot for Seneca
Last spring frost
Mar 21
First fall frost
Nov 11
Growing season
236 days
Hardiness zone
8b
More local growing data for Seneca: nearby ZIP 29678 weather · frost dates · planting calendar · South Carolina frost dates
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Climate data from the nearest NOAA station, Clemson Oconee Co Ap, Sc (3.9 mi from Seneca). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 5, 2026.