Yankton, SD Weather & Growing Conditions
This Afternoon
77°F
Partly Sunny
Partly sunny, with a high near 77. North wind 5 to 10 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Partly Sunny | 5 to 10 mph N | 6% |
| Tonight | 64°F | Mostly Cloudy then Patchy Fog | 5 to 10 mph NNW | 16% |
| Saturday | 70°F | Patchy Fog | 10 mph NNW | 20% |
| Saturday Night | 59°F | Cloudy | 10 mph NNE | 9% |
| Sunday | 64°F | Rain Showers Likely | 10 to 15 mph NE | 58% |
| Sunday Night | 55°F | Showers And Thunderstorms | 10 mph ENE | 85% |
| Monday | 60°F | Showers And Thunderstorms Likely | 10 mph ENE | 85% |
| Monday Night | 50°F | Chance Showers And Thunderstorms then Mostly Cloudy | 5 to 10 mph ENE | 37% |
| Tuesday | 65°F | Mostly Cloudy | 5 to 10 mph ESE | 7% |
| Tuesday Night | 51°F | Mostly Cloudy | 5 to 10 mph SE | 4% |
| Wednesday | 69°F | Partly Sunny then Slight Chance Rain Showers | 10 to 15 mph SSE | 15% |
| Wednesday Night | 55°F | Chance Rain Showers | 10 mph SE | 47% |
| Thursday | 69°F | Chance Rain Showers | 10 mph SSE | 47% |
| Thursday Night | 57°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 10 mph SE | 16% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Yankton, SD
Last spring frost
Apr 27
First fall frost
Oct 11
Growing season
164 days
Hardiness zone
5a
Explore more for Yankton, SD: full frost dates · planting calendar · South Dakota frost dates
Climate data from the nearest NOAA station, Yankton 2 E, Sd (4.9 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.