Yankton County, SD Weather Forecast

County weather hub

64°
F

Chance Rain Showers

Compare major city weather across Yankton County, scan the latest forecast snapshots, and jump into local 7-day outlook pages from one hub.

Monday, May 18, 2026
Wind: 15 mph NNW
Monday

A chance of rain showers. Cloudy. High near 64, with temperatures falling to around 61 in the afternoon. North northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%.

County weather hub

County Weather Overview

This county weather page brings together forecast coverage for Yankton County so visitors can compare temperatures, wind, and conditions across the region without hopping between unrelated pages.

Current forecast coverage spans 1 of 1 mapped cities in Yankton County.

Page Snapshot

Page focus
county weather
Forecast window
May 18 to May 22, 2026
Latest sync
May 16, 2026 2:17 PM CDT
Forecast office
FSD
Source
NOAA / NWS
Next High
64°F
Monday
Next Low
42°F
Monday Night
Rain Outlook
6
Periods mentioning precipitation
Windiest
15 to 25 mph
Monday Night

Daily Outlook

Today
May 18
Chance Rain Showers
64 °F
/ 42°F
Wind 15 mph
Tue
May 19
Chance Rain Showers then Mostly Cloudy
57 °F
/ 37°F
Wind 20 to 25 mph
Wed
May 20
Mostly Sunny
65 °F
/ 43°F
Wind 5 mph
Thu
May 21
Partly Sunny
71 °F
/ 47°F
Wind 10 to 15 mph
Fri
May 22
Slight Chance Rain Showers
76 °F
/ 53°F
Wind 10 to 15 mph

This Week in Yankton County

Friday looks like the warmest upcoming period in Yankton County at 76 degrees F.

Tuesday Night is the coolest period ahead with temperatures near 37 degrees F.

The strongest winds are forecast for Monday Night at about 15 to 25 mph NNW.

Precipitation is mentioned in 6 upcoming forecast periods.

Forecast Details

Last updated
May 16, 2026 2:17 PM CDT
Coverage
5 days
Time zone
America/Chicago
Forecast office
FSD
Radar station
KFSD

Weather data is provided by the National Weather Service and refreshed automatically for U.S. locations.

Open NOAA source

Extended Forecast

Monday Night
May 18
42°F
Showers And Thunderstorms Likely
15 to 25 mph NNW

A chance of rain showers before 7pm, then showers and thunderstorms likely. Cloudy, with a low around 42. North northwest wind 15 to 25 mph, with gusts as high as 35 mph. Chance of precipitation is 70%.

Tuesday
May 19
57°F
Chance Rain Showers then Mostly Cloudy
20 to 25 mph NW

A chance of rain showers before 7am. Mostly cloudy, with a high near 57. Chance of precipitation is 40%.

Tuesday Night
May 19
37°F
Partly Cloudy
5 to 20 mph NW

Partly cloudy, with a low around 37.

Wednesday
May 20
65°F
Mostly Sunny
5 mph NNE

Mostly sunny, with a high near 65.

Wednesday Night
May 20
43°F
Partly Cloudy
10 mph SE

Partly cloudy, with a low around 43.

Thursday
May 21
71°F
Partly Sunny
10 to 15 mph SSE

Partly sunny, with a high near 71.

Thursday Night
May 21
47°F
Mostly Cloudy then Slight Chance Rain Showers
10 to 15 mph SE

A slight chance of rain showers after 1am. Mostly cloudy, with a low around 47.

Friday
May 22
76°F
Slight Chance Rain Showers
10 to 15 mph SSE

A slight chance of rain showers. Partly sunny, with a high near 76.

Friday Night
May 22
53°F
Chance Showers And Thunderstorms
10 to 15 mph SE

A slight chance of rain showers before 7pm, then a chance of showers and thunderstorms. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.

Detailed Forecast

Period Conditions Temp Wind
Monday
May 18
Chance Rain Showers
64°F
15 mph
NNW
Monday Night
May 18
Showers And Thunderstorms Likely
42°F
15 to 25 mph
NNW
Tuesday
May 19
Chance Rain Showers then Mostly Cloudy
57°F
20 to 25 mph
NW
Tuesday Night
May 19
Partly Cloudy
37°F
5 to 20 mph
NW
Wednesday
May 20
Mostly Sunny
65°F
5 mph
NNE
Wednesday Night
May 20
Partly Cloudy
43°F
10 mph
SE
Thursday
May 21
Partly Sunny
71°F
10 to 15 mph
SSE
Thursday Night
May 21
Mostly Cloudy then Slight Chance Rain Showers
47°F
10 to 15 mph
SE
Friday
May 22
Slight Chance Rain Showers
76°F
10 to 15 mph
SSE
Friday Night
May 22
Chance Showers And Thunderstorms
53°F
10 to 15 mph
SE

Major City Forecasts

Live forecast snapshots for major cities across Yankton County.

Coverage

Tracked cities
1
Coverage
100%

Forecast coverage currently spans 1 of 1 mapped cities in Yankton County.

Largest mapped city population in this region: 14,651.

Scottish Rite Masonic Center 'Yankton SD' from E 1
Scottish Rite Masonic Center 'Yankton SD' from E 1 image
Weather data provided by the National Weather Service (NOAA). Forecast pages update automatically as new periods are synced for each supported U.S. location.