National Weather Service Forecast for: Sioux City IA
Issued by: National Weather Service Sioux Falls, SD
Updated: 8:28 am CDT May 29, 2026
 
Today

Today: A 50 percent chance of showers, mainly after 11am. Cloudy, with a high near 79. Southeast wind 5 to 10 mph, with gusts as high as 25 mph.
Chance
Showers

 Tonight

Tonight: A chance of showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 61. East southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Showers
Likely

 Saturday

Saturday: A 50 percent chance of showers and thunderstorms, mainly before 2pm. Mostly cloudy, with a high near 80. East southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Chance
Showers then
Chance
T-storms
 Saturday
Night
Saturday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 58. East southeast wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Chance
T-storms then
Showers
Likely
 Sunday

Sunday: Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81. Southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Showers
Likely

 Sunday
Night
Sunday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 59. East southeast wind 5 to 10 mph. Chance of precipitation is 60%.
Showers
Likely

 Monday

Monday: A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83.
Partly Sunny
then Chance
T-storms
 Monday
Night
Monday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 57.
Chance
T-storms

 Tuesday

Tuesday: Partly sunny, with a high near 83.
Partly Sunny
Hi 79 °F Lo 61 °F Hi 80 °F Lo 58 °F Hi 81 °F Lo 59 °F Hi 83 °F Lo 57 °F Hi 83 °F

Hazardous Weather Outlook
 

Today
 
 A 50 percent chance of showers, mainly after 11am. Cloudy, with a high near 79. Southeast wind 5 to 10 mph, with gusts as high as 25 mph.
Tonight
 
 A chance of showers and thunderstorms before 3am, then showers likely and possibly a thunderstorm between 3am and 4am, then a chance of showers and thunderstorms after 4am. Mostly cloudy, with a low around 61. East southeast wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
 
 A 50 percent chance of showers and thunderstorms, mainly before 2pm. Mostly cloudy, with a high near 80. East southeast wind 10 to 15 mph, with gusts as high as 25 mph.
Saturday Night
 
 A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 1am. Increasing clouds, with a low around 58. East southeast wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 70%.
Sunday
 
 Showers likely and possibly a thunderstorm before 1pm, then a chance of showers and thunderstorms after 1pm. Mostly cloudy, with a high near 81. Southeast wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 70%.
Sunday Night
 
 Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Mostly cloudy, with a low around 59. East southeast wind 5 to 10 mph. Chance of precipitation is 60%.
Monday
 
 A 30 percent chance of showers and thunderstorms after 1pm. Partly sunny, with a high near 83.
Monday Night
 
 A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 57.
Tuesday
 
 Partly sunny, with a high near 83.
Tuesday Night
 
 Mostly cloudy, with a low around 56.
Wednesday
 
 A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 82.
Wednesday Night
 
 A 40 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Thursday
 
 A 30 percent chance of showers and thunderstorms. Partly sunny, with a high near 84.

 

Forecast from NOAA-NWS for Sioux City IA.