National Weather Service Forecast for: Yankton SD
Issued by: National Weather Service Sioux Falls, SD
Updated: 11:28 am CDT May 4, 2026
 
This
Afternoon
This Afternoon: A chance of sprinkles after 4pm. Mostly sunny, with a high near 69. Breezy, with a north northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Chance
Sprinkles and
Breezy
 Tonight

Tonight: A chance of sprinkles before 10pm. Mostly cloudy, with a low around 38. Breezy, with a north northwest wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Breezy then
Mostly Cloudy
 Tuesday

Tuesday: Mostly cloudy, with a high near 57. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Mostly Cloudy

 Tuesday
Night
Tuesday Night: Mostly cloudy, with a low around 32. North wind 5 to 15 mph, with gusts as high as 20 mph.
Mostly Cloudy

 Wednesday

Wednesday: Widespread frost before 8am. Otherwise, partly sunny, with a high near 57. Northwest wind 5 to 10 mph.
Frost then
Partly Sunny
 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 35. Northwest wind 5 to 10 mph becoming southwest after midnight.
Partly Cloudy

 Thursday

Thursday: Areas of frost before 7am. Otherwise, sunny, with a high near 68.
Areas Frost
then Sunny
 Thursday
Night
Thursday Night: Partly cloudy, with a low around 38.
Partly Cloudy

 Friday

Friday: Mostly sunny, with a high near 70.
Mostly Sunny
Hi 69 °F Lo 38 °F Hi 57 °F Lo 32 °F Hi 57 °F Lo 35 °F Hi 68 °F Lo 38 °F Hi 70 °F

Hazardous Weather Outlook
 

This Afternoon
 
 A chance of sprinkles after 4pm. Mostly sunny, with a high near 69. Breezy, with a north northwest wind 15 to 20 mph, with gusts as high as 30 mph.
Tonight
 
 A chance of sprinkles before 10pm. Mostly cloudy, with a low around 38. Breezy, with a north northwest wind 15 to 20 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Tuesday
 
 Mostly cloudy, with a high near 57. Northwest wind 5 to 15 mph, with gusts as high as 20 mph.
Tuesday Night
 
 Mostly cloudy, with a low around 32. North wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday
 
 Widespread frost before 8am. Otherwise, partly sunny, with a high near 57. Northwest wind 5 to 10 mph.
Wednesday Night
 
 Partly cloudy, with a low around 35. Northwest wind 5 to 10 mph becoming southwest after midnight.
Thursday
 
 Areas of frost before 7am. Otherwise, sunny, with a high near 68.
Thursday Night
 
 Partly cloudy, with a low around 38.
Friday
 
 Mostly sunny, with a high near 70.
Friday Night
 
 Partly cloudy, with a low around 42.
Saturday
 
 Mostly sunny, with a high near 73.
Saturday Night
 
 A 30 percent chance of showers. Mostly cloudy, with a low around 45.
Sunday
 
 Mostly sunny, with a high near 72.

 

Forecast from NOAA-NWS for Yankton SD.