Seneca, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Seneca, a town in Faulk County, South Dakota.
Today
46°F
Slight Chance Light Rain then Cloudy
A slight chance of rain before noon. Cloudy, with a high near 46. North northwest wind 18 to 24 mph. Chance of precipitation is 20%.
7-day forecast for Seneca
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 46°F | Slight Chance Light Rain then Cloudy | 18 to 24 mph NNW | 15% |
| Tonight | 32°F | Cloudy | 13 to 16 mph NNW | 7% |
| Wednesday | 45°F | Mostly Cloudy | 16 to 20 mph NNW | 11% |
| Wednesday Night | 30°F | Mostly Cloudy | 12 to 16 mph NNW | 3% |
| Thursday | 45°F | Mostly Sunny | 7 to 12 mph N | 0% |
| Thursday Night | 25°F | Partly Cloudy | 6 mph ESE | 0% |
| Friday | 44°F | Mostly Sunny | 5 to 8 mph S | 0% |
| Friday Night | 28°F | Partly Cloudy | 5 to 8 mph SW | 1% |
| Saturday | 55°F | Mostly Sunny | 8 to 15 mph W | 3% |
| Saturday Night | 32°F | Mostly Clear | 10 mph W | 1% |
| Sunday | 56°F | Sunny | 8 to 12 mph SSW | 0% |
| Sunday Night | 37°F | Mostly Clear | 8 to 12 mph SW | 0% |
| Monday | 57°F | Sunny | 10 to 15 mph NW | 0% |
| Monday Night | 34°F | Partly Cloudy | 8 mph WNW | 1% |
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 Nov 3, 2026.