Yankton, SD Weather & Growing Conditions
Today
72°F
Patchy Smoke
Patchy smoke and a chance of showers and thunderstorms. Mostly cloudy, with a high near 72. North northwest wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Patchy Smoke | 5 to 15 mph NNW | 69% |
| Tonight | 55°F | Scattered Rain Showers then Mostly Cloudy | 0 to 5 mph WNW | 49% |
| Wednesday | 78°F | Mostly Sunny | 0 to 5 mph SE | 3% |
| Wednesday Night | 56°F | Mostly Clear | 5 mph S | 0% |
| Thursday | 84°F | Sunny | 5 to 15 mph S | 1% |
| Thursday Night | 65°F | Mostly Clear | 10 to 15 mph S | 5% |
| Friday | 90°F | Sunny | 5 to 10 mph SSW | 5% |
| Friday Night | 67°F | Mostly Clear | 5 to 10 mph SSE | 11% |
| Saturday | 93°F | Sunny | 5 to 15 mph S | 4% |
| Saturday Night | 69°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph SSE | 15% |
| Sunday | 92°F | Mostly Sunny | 10 to 15 mph SE | 9% |
| Sunday Night | 70°F | Partly Cloudy then Slight Chance Showers And Thunderstorms | 10 to 15 mph ESE | 16% |
| Monday | 91°F | Slight Chance Showers And Thunderstorms then Partly Sunny | 10 to 15 mph E | 16% |
| Monday Night | 69°F | Slight Chance Showers And Thunderstorms | 10 to 15 mph ENE | 22% |
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 Aug 4, 2026.