National Weather Service Forecast for: South Sioux City NE
Issued by: National Weather Service Sioux Falls, SD
Updated: 1:53 am CDT Jun 30, 2026
 
Overnight

Overnight: Showers and possibly a thunderstorm before 4am, then a chance of rain after 4am. Some of the storms could produce heavy rainfall. Low around 73. South southeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Heavy Rain

 Tuesday

Tuesday: Partly sunny, then gradually becoming sunny and hot, with a high near 95. South wind around 5 mph becoming calm.
Hot

 Tuesday
Night
Tuesday Night: A 40 percent chance of showers and thunderstorms, mainly between 3am and 5am. Increasing clouds, with a low around 72. South wind 5 to 10 mph becoming east southeast in the evening.
Partly Cloudy
then Chance
T-storms
 Wednesday

Wednesday: A chance of showers and thunderstorms before 3pm, then a chance of rain between 3pm and 5pm, then a slight chance of showers after 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 93. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Chance
T-storms then
Chance
Showers
 Wednesday
Night
Wednesday Night: A 40 percent chance of showers and thunderstorms, mainly between 7pm and 1am. Partly cloudy, with a low around 70. West southwest wind 5 to 10 mph becoming light and variable in the evening.
Chance
Showers

 Thursday

Thursday: A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Chance
Showers then
Chance
T-storms
 Thursday
Night
Thursday Night: Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72. Chance of precipitation is 70%.
Showers
Likely

 Friday

Friday: Mostly sunny, with a high near 94.
Mostly Sunny

 Friday
Night
Friday Night: A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Chance
T-storms
Lo 73 °F Hi 95 °F Lo 72 °F Hi 93 °F Lo 70 °F Hi 93 °F Lo 72 °F Hi 94 °F Lo 73 °F

Hazardous Weather Outlook
Severe Thunderstorm Watch
 

Overnight
 
 Showers and possibly a thunderstorm before 4am, then a chance of rain after 4am. Some of the storms could produce heavy rainfall. Low around 73. South southeast wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
 
 Partly sunny, then gradually becoming sunny and hot, with a high near 95. South wind around 5 mph becoming calm.
Tuesday Night
 
 A 40 percent chance of showers and thunderstorms, mainly between 3am and 5am. Increasing clouds, with a low around 72. South wind 5 to 10 mph becoming east southeast in the evening.
Wednesday
 
 A chance of showers and thunderstorms before 3pm, then a chance of rain between 3pm and 5pm, then a slight chance of showers after 5pm. Mostly cloudy, then gradually becoming sunny, with a high near 93. South wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 40%.
Wednesday Night
 
 A 40 percent chance of showers and thunderstorms, mainly between 7pm and 1am. Partly cloudy, with a low around 70. West southwest wind 5 to 10 mph becoming light and variable in the evening.
Thursday
 
 A 40 percent chance of showers and thunderstorms. Mostly sunny, with a high near 93. South southeast wind 5 to 10 mph, with gusts as high as 20 mph.
Thursday Night
 
 Showers likely and possibly a thunderstorm before 1am, then a chance of showers and thunderstorms after 1am. Partly cloudy, with a low around 72. Chance of precipitation is 70%.
Friday
 
 Mostly sunny, with a high near 94.
Friday Night
 
 A 50 percent chance of showers and thunderstorms. Partly cloudy, with a low around 73.
Independence Day
 
 Partly sunny, with a high near 93.
Saturday Night
 
 Showers likely and possibly a thunderstorm. Partly cloudy, with a low around 68. Chance of precipitation is 60%.
Sunday
 
 Partly sunny, with a high near 88.
Sunday Night
 
 Partly cloudy, with a low around 66.
Monday
 
 Mostly sunny, with a high near 89.

 

Forecast from NOAA-NWS for South Sioux City NE.