Seneca, SD Weather & Growing Conditions
Overnight
56°F
Areas Of Fog
Areas of fog and a slight chance of drizzle. Cloudy, with a low around 56. North northeast wind around 9 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Areas Of Fog | 9 mph NNE | 18% |
| Saturday | 64°F | Areas Of Fog then Cloudy | 10 to 14 mph NNE | 25% |
| Saturday Night | 51°F | Chance Rain Showers | 10 to 15 mph NE | 34% |
| Sunday | 62°F | Chance Rain Showers | 17 mph ENE | 45% |
| Sunday Night | 50°F | Rain Showers | 10 to 15 mph ENE | 78% |
| Monday | 61°F | Rain Showers | 13 mph E | 78% |
| Monday Night | 47°F | Mostly Cloudy | 8 to 12 mph ESE | 10% |
| Tuesday | 65°F | Partly Sunny | 10 to 18 mph SE | 7% |
| Tuesday Night | 51°F | Mostly Cloudy then Slight Chance Rain Showers | 17 mph SE | 20% |
| Wednesday | 70°F | Slight Chance Rain Showers | 20 mph SSE | 22% |
| Wednesday Night | 54°F | Chance Rain Showers | 12 to 18 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 | 72°F | Partly Sunny | 10 to 17 mph SE | 12% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Seneca, SD
Last spring frost
May 14
First fall frost
Sep 29
Growing season
138 days
Hardiness zone
4b
Explore more for Seneca, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Highmore 23 N, Sd (10.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.