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
79°F
Partly Sunny
Partly sunny, with a high near 79. North northeast wind 5 to 10 mph.
7-day forecast for Yankton
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Partly Sunny | 5 to 10 mph NNE | 6% |
| Tonight | 64°F | Mostly Cloudy then Patchy Fog | 5 to 10 mph NNW | 17% |
| Saturday | 71°F | Patchy Fog then Cloudy | 5 to 10 mph NNW | 20% |
| Saturday Night | 58°F | Cloudy | 5 to 10 mph NNE | 10% |
| Sunday | 65°F | Rain Showers Likely | 10 to 15 mph NE | 58% |
| Sunday Night | 55°F | Showers And Thunderstorms | 5 to 10 mph ENE | 85% |
| Monday | 61°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 | 40% |
| Tuesday | 65°F | Mostly Cloudy | 5 to 10 mph E | 7% |
| Tuesday Night | 51°F | Mostly Cloudy | 5 to 10 mph SE | 4% |
| Wednesday | 69°F | Partly Sunny then Slight Chance Rain Showers | 5 to 15 mph SSE | 15% |
| Wednesday Night | 55°F | Chance Rain Showers | 5 to 10 mph SE | 47% |
| Thursday | 70°F | Chance Rain Showers | 5 to 10 mph SSE | 47% |
| Thursday Night | 56°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 10 mph SE | 17% |
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 Sep 18, 2026.