National Weather Service Forecast for: Fort Pierre SD
Issued by: National Weather Service Aberdeen, SD
Updated: 2:36 am CDT Aug 20, 2026
 
Overnight

Overnight: Mostly clear, with a steady temperature around 70. South wind 11 to 13 mph.
Mostly Clear

 Thursday

Thursday: Patchy smoke after 4pm. Sunny and hot, with a high near 90. South southwest wind 6 to 9 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.
Sunny then
Patchy Smoke
 Thursday
Night
Thursday Night: Patchy smoke before 8pm. Mostly clear, with a low around 61. North wind around 6 mph becoming calm in the evening.
Patchy Smoke
then Mostly
Clear
 Friday

Friday: Sunny, with a high near 88. East wind 5 to 11 mph, with gusts as high as 20 mph.
Sunny

 Friday
Night
Friday Night: Mostly clear, with a low around 61. East northeast wind 5 to 9 mph.
Mostly Clear

 Saturday

Saturday: Sunny, with a high near 84. East wind 5 to 9 mph.
Sunny

 Saturday
Night
Saturday Night: A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 62. East wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Partly Cloudy
then Chance
Showers
 Sunday

Sunday: A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85. Breezy, with a southeast wind 16 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 30%.
Chance
Showers and
Breezy
 Sunday
Night
Sunday Night: A chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 64. Breezy, with a southeast wind 14 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 50%.
Chance
T-storms and
Breezy
Lo 70 °F Hi 90 °F Lo 61 °F Hi 88 °F Lo 61 °F Hi 84 °F Lo 62 °F Hi 85 °F Lo 64 °F

 

Overnight
 
 Mostly clear, with a steady temperature around 70. South wind 11 to 13 mph.
Thursday
 
 Patchy smoke after 4pm. Sunny and hot, with a high near 90. South southwest wind 6 to 9 mph becoming north northwest in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
 
 Patchy smoke before 8pm. Mostly clear, with a low around 61. North wind around 6 mph becoming calm in the evening.
Friday
 
 Sunny, with a high near 88. East wind 5 to 11 mph, with gusts as high as 20 mph.
Friday Night
 
 Mostly clear, with a low around 61. East northeast wind 5 to 9 mph.
Saturday
 
 Sunny, with a high near 84. East wind 5 to 9 mph.
Saturday Night
 
 A chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 62. East wind 10 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Sunday
 
 A chance of showers and thunderstorms before 1pm. Partly sunny, with a high near 85. Breezy, with a southeast wind 16 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 30%.
Sunday Night
 
 A chance of showers and thunderstorms, mainly before 1am. Mostly cloudy, with a low around 64. Breezy, with a southeast wind 14 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 50%.
Monday
 
 Mostly sunny, with a high near 89.
Monday Night
 
 Partly cloudy, with a low around 64.
Tuesday
 
 A slight chance of showers. Mostly sunny, with a high near 86. Chance of precipitation is 20%.
Tuesday Night
 
 Partly cloudy, with a low around 61.
Wednesday
 
 Mostly sunny, with a high near 85.

 

Forecast from NOAA-NWS for Fort Pierre SD.