National Weather Service Forecast for: Sioux City IA
Issued by: National Weather Service Sioux Falls, SD
Updated: 1:48 am CST Feb 2, 2026
 
Overnight

Overnight: Mostly cloudy, with a low around 24. North northwest wind around 5 mph becoming calm.
Mostly Cloudy

 Monday

Monday: Mostly cloudy, with a high near 36. Calm wind becoming east around 5 mph.
Mostly Cloudy

 Monday
Night
Monday Night: A chance of snow before 4am, then a chance of flurries between 4am and 5am, then a slight chance of snow and freezing rain after 5am. Cloudy, with a low around 20. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 20%.
Slight Chance
Snow then
Slight Chance
Wintry Mix
 Tuesday

Tuesday: Mostly cloudy, with a high near 31. Northeast wind around 5 mph becoming calm in the morning.
Mostly Cloudy

 Tuesday
Night
Tuesday Night: A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 21. Calm wind becoming northwest around 5 mph.
Mostly Cloudy
then Slight
Chance Snow
 Wednesday

Wednesday: Mostly cloudy, with a high near 36. North northwest wind 5 to 10 mph.
Mostly Cloudy

 Wednesday
Night
Wednesday Night: Mostly cloudy, with a low around 23.
Mostly Cloudy

 Thursday

Thursday: Mostly sunny, with a high near 50.
Mostly Sunny

 Thursday
Night
Thursday Night: Mostly clear, with a low around 30.
Mostly Clear
Lo 24 °F Hi 36 °F Lo 20 °F Hi 31 °F Lo 21 °F Hi 36 °F Lo 23 °F Hi 50 °F Lo 30 °F

 

Overnight
 
 Mostly cloudy, with a low around 24. North northwest wind around 5 mph becoming calm.
Monday
 
 Mostly cloudy, with a high near 36. Calm wind becoming east around 5 mph.
Monday Night
 
 A chance of snow before 4am, then a chance of flurries between 4am and 5am, then a slight chance of snow and freezing rain after 5am. Cloudy, with a low around 20. Calm wind becoming east around 5 mph after midnight. Chance of precipitation is 20%.
Tuesday
 
 Mostly cloudy, with a high near 31. Northeast wind around 5 mph becoming calm in the morning.
Tuesday Night
 
 A 20 percent chance of snow after midnight. Mostly cloudy, with a low around 21. Calm wind becoming northwest around 5 mph.
Wednesday
 
 Mostly cloudy, with a high near 36. North northwest wind 5 to 10 mph.
Wednesday Night
 
 Mostly cloudy, with a low around 23.
Thursday
 
 Mostly sunny, with a high near 50.
Thursday Night
 
 Mostly clear, with a low around 30.
Friday
 
 Mostly sunny, with a high near 41.
Friday Night
 
 Mostly clear, with a low around 19.
Saturday
 
 Mostly sunny, with a high near 42.
Saturday Night
 
 Partly cloudy, with a low around 22.
Sunday
 
 Mostly sunny, with a high near 45.

 

Forecast from NOAA-NWS for Sioux City IA.