Kennebec, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Kennebec, a town in Lyman County, South Dakota.
Overnight
48°F
Mostly Cloudy
Mostly cloudy, with a low around 48. North northwest wind around 5 mph.
7-day forecast for Kennebec
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 48°F | Mostly Cloudy | 5 mph NNW | 9% |
| Tuesday | 72°F | Patchy Smoke then Partly Sunny | 2 to 13 mph NW | 10% |
| Tuesday Night | 54°F | Partly Cloudy | 7 mph SW | 2% |
| Wednesday | 82°F | Mostly Sunny | 5 to 13 mph SSW | 1% |
| Wednesday Night | 60°F | Partly Cloudy | 14 mph S | 4% |
| Thursday | 90°F | Sunny | 13 mph S | 5% |
| Thursday Night | 64°F | Mostly Clear | 12 mph S | 5% |
| Friday | 93°F | Sunny | 8 to 12 mph WSW | 1% |
| Friday Night | 65°F | Mostly Clear | 12 mph SE | 4% |
| Saturday | 96°F | Sunny | 9 to 20 mph SE | 4% |
| Saturday Night | 65°F | Mostly Clear | 8 to 20 mph ESE | 6% |
| Sunday | 92°F | Mostly Sunny | 8 to 20 mph E | 3% |
| Sunday Night | 66°F | Chance Showers And Thunderstorms | 13 to 18 mph E | 29% |
| Monday | 90°F | Chance Showers And Thunderstorms then Partly Sunny | 12 to 17 mph ENE | 29% |
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 Aug 4, 2026.