Yankton, SD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Yankton, a city in Yankton County, South Dakota.
This Afternoon
51°F
Rain Showers
Rain showers. Cloudy. High near 51, with temperatures falling to around 46 in the afternoon. North northwest wind around 20 mph, with gusts as high as 35 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for Yankton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 51°F | Rain Showers | 20 mph NNW | 84% |
| Tonight | 39°F | Rain Showers | 15 to 20 mph NW | 81% |
| Wednesday | 47°F | Chance Rain Showers | 15 to 20 mph WNW | 43% |
| Wednesday Night | 37°F | Rain Showers Likely | 10 to 15 mph NW | 67% |
| Thursday | 48°F | Mostly Cloudy | 10 to 15 mph NW | 12% |
| Thursday Night | 32°F | Mostly Cloudy | 0 to 10 mph N | 1% |
| Friday | 49°F | Partly Sunny | 0 to 5 mph E | 0% |
| Friday Night | 32°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Saturday | 59°F | Mostly Sunny | 5 to 10 mph WSW | 3% |
| Saturday Night | 37°F | Mostly Clear | 5 mph W | 4% |
| Sunday | 61°F | Sunny | 5 to 10 mph SW | 1% |
| Sunday Night | 41°F | Mostly Clear | 5 to 10 mph SSW | 1% |
| Monday | 62°F | Sunny | 10 to 15 mph W | 0% |
| Monday Night | 39°F | Mostly Clear | 5 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Yankton (42.890, -97.393). Updated through the day.
Growing snapshot for Yankton
Last spring frost
Apr 27
First fall frost
Oct 11
Growing season
164 days
Hardiness zone
5a
More local growing data for Yankton: nearby ZIP 57078 weather · frost dates · planting calendar · South Dakota frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Yankton 2 E, Sd (4.9 mi from Yankton). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.