National Weather Service Forecast for: Sioux City IA
Issued by: National Weather Service Sioux Falls, SD
Updated: 1:33 pm CDT Mar 19, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 76. Southwest wind around 5 mph.
Sunny
 Tonight

Tonight: Partly cloudy, with a low around 43. South wind around 5 mph becoming west northwest after midnight.
Partly Cloudy
 Friday

Friday: Sunny, with a high near 79. West northwest wind around 5 mph.
Sunny
 Friday
Night
Friday Night: Mostly clear, with a low around 44. Northwest wind around 5 mph becoming south southeast in the evening.
Mostly Clear
 Saturday

Saturday: Sunny, with a high near 88. South southwest wind 5 to 10 mph.
Sunny
 Saturday
Night
Saturday Night: Partly cloudy, with a low around 46. South wind 10 to 15 mph becoming north after midnight. Winds could gust as high as 25 mph.
Partly Cloudy
 Sunday

Sunday: Partly sunny, with a high near 60.
Partly Sunny
 Sunday
Night
Sunday Night: Partly cloudy, with a low around 29.
Partly Cloudy
 Monday

Monday: Partly sunny, with a high near 56.
Partly Sunny
Hi 76 °F Lo 43 °F Hi 79 °F Lo 44 °F Hi 88 °F Lo 46 °F Hi 60 °F Lo 29 °F Hi 56 °F

 

This Afternoon
 
 Sunny, with a high near 76. Southwest wind around 5 mph.
Tonight
 
 Partly cloudy, with a low around 43. South wind around 5 mph becoming west northwest after midnight.
Friday
 
 Sunny, with a high near 79. West northwest wind around 5 mph.
Friday Night
 
 Mostly clear, with a low around 44. Northwest wind around 5 mph becoming south southeast in the evening.
Saturday
 
 Sunny, with a high near 88. South southwest wind 5 to 10 mph.
Saturday Night
 
 Partly cloudy, with a low around 46. South wind 10 to 15 mph becoming north after midnight. Winds could gust as high as 25 mph.
Sunday
 
 Partly sunny, with a high near 60.
Sunday Night
 
 Partly cloudy, with a low around 29.
Monday
 
 Partly sunny, with a high near 56.
Monday Night
 
 Mostly cloudy, with a low around 39.
Tuesday
 
 Partly sunny, with a high near 63.
Tuesday Night
 
 Mostly cloudy, with a low around 39.
Wednesday
 
 Partly sunny, with a high near 73.

 

Forecast from NOAA-NWS for Sioux City IA.