National Weather Service Forecast for: Sioux City IA
Issued by: National Weather Service Sioux Falls, SD
Updated: 8:54 pm CST Dec 17, 2025
 
Tonight

Tonight: Rain, mainly before 2am. Low around 33. South wind around 15 mph becoming west northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Rain

 Thursday

Thursday: A chance of flurries with a slight chance of snow before 11am, then a chance of flurries between 11am and 5pm. Partly sunny, with a temperature falling to around 19 by 3pm. Windy, with a northwest wind 20 to 30 mph, with gusts as high as 50 mph. Chance of precipitation is 20%.
Windy. Slight
Chance Snow
then Chance
Flurries
 Thursday
Night
Thursday Night: Mostly clear, with a low around 11. Blustery, with a northwest wind 15 to 20 mph becoming northwest 5 to 10 mph after midnight. Winds could gust as high as 35 mph.
Mostly Clear
and Blustery
then Partly
Cloudy
 Friday

Friday: Mostly sunny, with a high near 38. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Mostly Sunny

 Friday
Night
Friday Night: Mostly cloudy, with a low around 29. South southeast wind 5 to 10 mph becoming northwest after midnight.
Mostly Cloudy

 Saturday

Saturday: Mostly sunny, with a high near 38. North northwest wind 5 to 10 mph.
Mostly Sunny

 Saturday
Night
Saturday Night: Mostly clear, with a low around 20.
Mostly Clear

 Sunday

Sunday: Mostly sunny, with a high near 40.
Mostly Sunny

 Sunday
Night
Sunday Night: Mostly cloudy, with a low around 29.
Mostly Cloudy
Lo 33 °F Hi 35 °F⇓ Lo 11 °F Hi 38 °F Lo 29 °F Hi 38 °F Lo 20 °F Hi 40 °F Lo 29 °F

Hazardous Weather Outlook
High Wind Warning
 

Tonight
 
 Rain, mainly before 2am. Low around 33. South wind around 15 mph becoming west northwest after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
 
 A chance of flurries with a slight chance of snow before 11am, then a chance of flurries between 11am and 5pm. Partly sunny, with a temperature falling to around 19 by 3pm. Windy, with a northwest wind 20 to 30 mph, with gusts as high as 50 mph. Chance of precipitation is 20%.
Thursday Night
 
 Mostly clear, with a low around 11. Blustery, with a northwest wind 15 to 20 mph becoming northwest 5 to 10 mph after midnight. Winds could gust as high as 35 mph.
Friday
 
 Mostly sunny, with a high near 38. South southeast wind 5 to 15 mph, with gusts as high as 25 mph.
Friday Night
 
 Mostly cloudy, with a low around 29. South southeast wind 5 to 10 mph becoming northwest after midnight.
Saturday
 
 Mostly sunny, with a high near 38. North northwest wind 5 to 10 mph.
Saturday Night
 
 Mostly clear, with a low around 20.
Sunday
 
 Mostly sunny, with a high near 40.
Sunday Night
 
 Mostly cloudy, with a low around 29.
Monday
 
 Mostly sunny, with a high near 47.
Monday Night
 
 Partly cloudy, with a low around 31.
Tuesday
 
 Partly sunny, with a high near 43.
Tuesday Night
 
 Mostly cloudy, with a low around 27.
Wednesday
 
 Partly sunny, with a high near 43.

 

Forecast from NOAA-NWS for Sioux City IA.