National Weather Service Forecast for: Sioux City IA
Issued by: National Weather Service Sioux Falls, SD
Updated: 12:43 pm CDT Oct 6, 2026
 
This
Afternoon
This Afternoon: Sunny, with a high near 84. West wind around 5 mph.
Sunny

 Tonight

Tonight: Mostly clear, with a low around 53. Calm wind becoming north northwest around 5 mph.
Mostly Clear

 Wednesday

Wednesday: Sunny, with a high near 76. Northwest wind around 5 mph.
Sunny

 Wednesday
Night
Wednesday Night: Partly cloudy, with a low around 49. Calm wind.
Partly Cloudy

 Thursday

Thursday: Mostly sunny, with a high near 70. Calm wind becoming east southeast around 5 mph.
Mostly Sunny

 Thursday
Night
Thursday Night: Partly cloudy, with a low around 52. Calm wind becoming southeast around 5 mph.
Partly Cloudy

 Friday

Friday: Sunny, with a high near 75.
Sunny

 Friday
Night
Friday Night: Mostly clear, with a low around 61.
Mostly Clear

 Saturday

Saturday: Sunny, with a high near 81. Breezy.
Sunny then
Sunny and
Breezy
Hi 84 °F Lo 53 °F Hi 76 °F Lo 49 °F Hi 70 °F Lo 52 °F Hi 75 °F Lo 61 °F Hi 81 °F

 

This Afternoon
 
 Sunny, with a high near 84. West wind around 5 mph.
Tonight
 
 Mostly clear, with a low around 53. Calm wind becoming north northwest around 5 mph.
Wednesday
 
 Sunny, with a high near 76. Northwest wind around 5 mph.
Wednesday Night
 
 Partly cloudy, with a low around 49. Calm wind.
Thursday
 
 Mostly sunny, with a high near 70. Calm wind becoming east southeast around 5 mph.
Thursday Night
 
 Partly cloudy, with a low around 52. Calm wind becoming southeast around 5 mph.
Friday
 
 Sunny, with a high near 75.
Friday Night
 
 Mostly clear, with a low around 61.
Saturday
 
 Sunny, with a high near 81. Breezy.
Saturday Night
 
 Clear, with a low around 62.
Sunday
 
 Sunny, with a high near 76.
Sunday Night
 
 A 30 percent chance of showers. Partly cloudy, with a low around 56.
Columbus Day
 
 A 30 percent chance of showers. Partly sunny, with a high near 64.

 

Forecast from NOAA-NWS for Sioux City IA.