Seneca, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Seneca, a town in Faulk County, South Dakota.
Today
74°F
Patchy Smoke then Mostly Sunny
Patchy smoke before 10am. Mostly sunny, with a high near 74. Northwest wind 9 to 14 mph, with gusts as high as 22 mph.
7-day forecast for Seneca
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Patchy Smoke then Mostly Sunny | 9 to 14 mph NW | 0% |
| Tonight | 54°F | Mostly Clear | 6 to 10 mph WSW | 0% |
| Wednesday | 82°F | Mostly Sunny | 9 to 15 mph SW | 0% |
| Wednesday Night | 60°F | Partly Cloudy | 9 to 15 mph SSW | 4% |
| Thursday | 88°F | Sunny | 14 mph SW | 4% |
| Thursday Night | 62°F | Mostly Clear | 12 mph SW | 4% |
| Friday | 90°F | Sunny | 14 mph WNW | 2% |
| Friday Night | 62°F | Mostly Clear | 10 to 14 mph E | 1% |
| Saturday | 91°F | Mostly Sunny | 12 to 18 mph E | 3% |
| Saturday Night | 62°F | Mostly Clear | 13 to 16 mph ENE | 5% |
| Sunday | 88°F | Mostly Sunny | 13 to 18 mph ENE | 3% |
| Sunday Night | 63°F | Chance Showers And Thunderstorms | 14 to 18 mph ENE | 32% |
| Monday | 86°F | Chance Showers And Thunderstorms then Partly Sunny | 14 to 20 mph ENE | 32% |
| Monday Night | 61°F | Chance Showers And Thunderstorms | 15 to 18 mph ENE | 25% |
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 Aug 4, 2026.