Kennebec, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Kennebec, a town in Lyman County, South Dakota.
This Afternoon
73°F
Cloudy
Cloudy, with a high near 73. North northwest wind around 6 mph.
7-day forecast for Kennebec
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Cloudy | 6 mph NNW | 2% |
| Tonight | 57°F | Cloudy then Patchy Fog | 5 to 9 mph N | 7% |
| Saturday | 67°F | Patchy Fog then Cloudy | 9 to 13 mph NNE | 7% |
| Saturday Night | 55°F | Chance Rain Showers | 9 to 13 mph NE | 37% |
| Sunday | 63°F | Rain Showers Likely | 10 to 15 mph ENE | 68% |
| Sunday Night | 52°F | Rain Showers | 9 to 13 mph ENE | 90% |
| Monday | 63°F | Rain Showers | 13 mph E | 88% |
| Monday Night | 48°F | Mostly Cloudy | 12 mph ESE | 13% |
| Tuesday | 69°F | Mostly Cloudy | 9 to 20 mph SE | 13% |
| Tuesday Night | 53°F | Mostly Cloudy then Slight Chance Rain Showers | 18 mph SE | 15% |
| Wednesday | 74°F | Chance Rain Showers | 18 to 22 mph SSE | 29% |
| Wednesday Night | 55°F | Chance Rain Showers | 12 to 18 mph SSE | 29% |
| Thursday | 75°F | Chance Rain Showers then Partly Sunny | 12 mph SSE | 26% |
| Thursday Night | 56°F | Partly Cloudy | 12 mph SE | 7% |
Forecast source: National Weather Service (api.weather.gov) for Kennebec (43.903, -99.862). Updated through the day.
Growing snapshot for Kennebec
Last spring frost
May 12
First fall frost
Sep 28
Growing season
137 days
Hardiness zone
5a
More local growing data for Kennebec: nearby ZIP 57544 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Kennebec, Sd (1.5 mi from Kennebec). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.