Seneca, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Seneca, a town in Faulk County, South Dakota.
Tonight
55°F
Areas Of Fog
Areas of fog. Cloudy, with a low around 55. North northeast wind 6 to 10 mph.
7-day forecast for Seneca
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Areas Of Fog | 6 to 10 mph NNE | 7% |
| Saturday | 65°F | Areas Of Fog | 10 to 14 mph NE | 7% |
| Saturday Night | 52°F | Cloudy then Chance Rain Showers | 10 to 14 mph NE | 38% |
| Sunday | 62°F | Chance Rain Showers | 16 mph ENE | 45% |
| Sunday Night | 51°F | Rain Showers | 9 to 14 mph ENE | 77% |
| Monday | 62°F | Rain Showers | 13 mph E | 77% |
| Monday Night | 48°F | Mostly Cloudy | 8 to 13 mph ESE | 10% |
| Tuesday | 65°F | Partly Sunny | 9 to 18 mph SE | 6% |
| Tuesday Night | 51°F | Mostly Cloudy then Slight Chance Rain Showers | 17 mph SE | 20% |
| Wednesday | 70°F | Slight Chance Rain Showers | 16 to 20 mph SSE | 22% |
| Wednesday Night | 54°F | Chance Rain Showers | 12 to 17 mph SSE | 30% |
| Thursday | 71°F | Chance Rain Showers then Partly Sunny | 13 mph SE | 30% |
| Thursday Night | 54°F | Partly Cloudy | 12 mph SE | 13% |
| Friday | 71°F | Partly Sunny | 9 to 17 mph SE | 11% |
Forecast source: National Weather Service (api.weather.gov) for Seneca (45.061, -99.509). Updated through the day.
Growing snapshot for Seneca
Last spring frost
May 14
First fall frost
Sep 29
Growing season
138 days
Hardiness zone
4b
More local growing data for Seneca: nearby ZIP 57473 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Highmore 23 N, Sd (10.2 mi from Seneca). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.