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Sisseton, South Dakota 7 Day Weather Forecast
Wx Forecast - Wx Discussion - Wx Aviation
NWS Forecast for Sisseton SD
National Weather Service Forecast for: Sisseton SD
Issued by: National Weather Service Aberdeen, SD
Updated: 12:47 am CDT Aug 11, 2025
 
Overnight

Overnight: Areas of smoke. Partly cloudy, with a low around 58. Light southwest wind.
Areas Smoke

Monday

Monday: Patchy smoke before 1pm. Mostly sunny, with a high near 85. Southwest wind 8 to 14 mph, with gusts as high as 22 mph.
Patchy Smoke

Monday
Night
Monday Night: A slight chance of showers and thunderstorms between 10pm and 1am.  Partly cloudy, with a low around 61. South southwest wind 8 to 11 mph becoming west northwest after midnight. Winds could gust as high as 20 mph.  Chance of precipitation is 20%.
Slight Chance
T-storms

Tuesday

Tuesday: Sunny, with a high near 76. Northwest wind 10 to 14 mph, with gusts as high as 23 mph.
Sunny

Tuesday
Night
Tuesday Night: Clear, with a low around 57. North northwest wind 5 to 9 mph becoming light and variable.
Clear

Wednesday

Wednesday: Sunny, with a high near 81. South southwest wind 5 to 13 mph becoming southeast in the afternoon.
Sunny

Wednesday
Night
Wednesday Night: A chance of showers and thunderstorms, mainly after 1am.  Partly cloudy, with a low around 65. Southeast wind around 14 mph, with gusts as high as 22 mph.  Chance of precipitation is 40%.
Slight Chance
T-storms then
Chance
Showers
Thursday

Thursday: Mostly sunny, with a high near 87. South wind around 15 mph, with gusts as high as 24 mph.
Mostly Sunny

Thursday
Night
Thursday Night: A slight chance of showers and thunderstorms after 1am.  Partly cloudy, with a low around 69. South wind 10 to 13 mph.  Chance of precipitation is 20%.
Mostly Clear
then Slight
Chance
T-storms
Lo 58 °F Hi 85 °F Lo 61 °F Hi 76 °F Lo 57 °F Hi 81 °F Lo 65 °F Hi 87 °F Lo 69 °F

Hazardous Weather Outlook
 

Overnight
 
Areas of smoke. Partly cloudy, with a low around 58. Light southwest wind.
Monday
 
Patchy smoke before 1pm. Mostly sunny, with a high near 85. Southwest wind 8 to 14 mph, with gusts as high as 22 mph.
Monday Night
 
A slight chance of showers and thunderstorms between 10pm and 1am. Partly cloudy, with a low around 61. South southwest wind 8 to 11 mph becoming west northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 20%.
Tuesday
 
Sunny, with a high near 76. Northwest wind 10 to 14 mph, with gusts as high as 23 mph.
Tuesday Night
 
Clear, with a low around 57. North northwest wind 5 to 9 mph becoming light and variable.
Wednesday
 
Sunny, with a high near 81. South southwest wind 5 to 13 mph becoming southeast in the afternoon.
Wednesday Night
 
A chance of showers and thunderstorms, mainly after 1am. Partly cloudy, with a low around 65. Southeast wind around 14 mph, with gusts as high as 22 mph. Chance of precipitation is 40%.
Thursday
 
Mostly sunny, with a high near 87. South wind around 15 mph, with gusts as high as 24 mph.
Thursday Night
 
A slight chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 69. South wind 10 to 13 mph. Chance of precipitation is 20%.
Friday
 
A slight chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 85. Chance of precipitation is 20%.
Friday Night
 
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Saturday
 
A slight chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 20%.
Saturday Night
 
A chance of showers and thunderstorms. Partly cloudy, with a low around 64. Chance of precipitation is 40%.
Sunday
 
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 81. Chance of precipitation is 20%.

 

Forecast from NOAA-NWS for Sisseton SD.

Weather Forecast Discussion
144
FXUS63 KABR 110538
AFDABR

Area Forecast Discussion
National Weather Service Aberdeen SD
1238 AM CDT Mon Aug 11 2025

.KEY MESSAGES...

- Smoke (aloft and near-surface) from Canadian wildfires will linger
  overnight and eventually clear out on Monday from west to east.

- Shower and thunderstorm chances, along with severe thunderstorm
  potential look to increase by the end of the upcoming week.

&&

.UPDATE...
Issued at 635 PM CDT Sun Aug 10 2025

Visibility across the forecast area ranges from 3 to around 6
miles, with the least amount of smoke over far eastern SD and west
central MN. The latest HRRR smoke analysis has the smoke
continuing to spread east, which aligns with the latest satellite
trends and overall wind pattern. We`ll also be monitoring decaying
showers and thunderstorms over southwestern SD. At this time, they
are expected to continue to weaken before moving much into Jones
County. No significant changes are expected to the ongoing
forecast.

&&

.DISCUSSION...
Issued at 337 PM CDT Sun Aug 10 2025

Visibility across central SD still between 2-3SM as shown by
KMBG/KPIR observations this afternoon. A bit of a surprise is that
KABR has improved to P6SM after earlier hovering around 6SM this
morning. Lowering of visibility still possible across the James
River valley into remaining portions of the eastern CWA into this
evening as the latest HRRR-smoke run shows near-surface smoke
concentration increasing (but only slightly) over the next several
hours. Still plenty of smoke aloft over the region at the very
least. As southwesterly flow increases through the day Monday, it
appears smoke will clear out from west to east throughout the day.

Very warm temperatures make a return to the region on Monday as
warmer air surges eastward ahead of an approaching cold front. Model
850mb temps warm to between +20C and +25C by Monday afternoon ahead
of the wind shift. High temperatures look to reach the upper 80s to
low 90s from the James River valley westward into central SD. As the
cold front moves through during the late afternoon and evening
hours, HREF paintball output shows a handful/several CAMs with
widely scattered shower and thunderstorm activity across the
northern CWA. A look at soundings reveal rather dry low levels and
cloud bases perhaps up to 8-10k feet. The moist layer is rather
shallow as well. Not really a good setup for receiving
precipitation, but will maintain slight chance (20%) PoPs in the
forecast across the northern CWA for the late afternoon and evening
hours.

Surface high pressure then looks to build in behind the cold front
for Monday night and Tuesday, with cooler 850mb temps in the teens C
moving in. High temps on Tuesday will likely drop back into the
upper 70s to mid 80s for most locations.

Models still suggest increasing dewpoints through the 60s to near 70
degrees by the middle/end of the upcoming week into next weekend.
This will also lead to general increases in unstable air across the
region, as models also show frontal boundaries and waves of low
pressure moving across the Northern Plains. Inherited PoP grids show
on and off chances for showers and thunderstorms during this time
period, which makes sense given the unsettled look to the pattern
coming up. Machine learning products also point to increased
probabilities for severe weather by the end of the forecast period.

&&

.AVIATION /06Z TAFS THROUGH 06Z MONDAY/...
Issued at 1228 AM CDT Mon Aug 11 2025

Terminals KABR,KATY,KPIR,KMBG

Smoke will cause reductions to visibility at the KABR KPIR and
KMBG terminals through the morning hours with a gradual
improvement. A fast moving front will provide forcing for
isolated to scattered showers and weak storms late this
afternoon. Too low a probability of occurrence at any of the
terminals for inclusion in this round of TAFS.

&&

.ABR WATCHES/WARNINGS/ADVISORIES...
SD...None.
MN...None.
&&

$$

UPDATE...06
DISCUSSION...TMT
AVIATION...07
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Forecast Discussion from: NOAA-NWS Script developed by: El Dorado Weather






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