Sioux City weather live forecast

Today's maximum temperature in Sioux City is expected to be 32°C. Select a day from the live weather forecast for Sioux City, Iowa, USA for more weather parameters.

Tuesday
1st Sep
32

23

4

7
Wednesday
2nd Sep
31

22

6

6
Thursday
3rd Sep
34

23

10

7
Friday
4th Sep
35

25

9

7
Saturday
5th Sep
33

23

6

7

5-day weather forecast updated at 04:01 on Tuesday 1st September 2026 GMT

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The 5-day weather forecast for Iowa (Sioux City) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Sioux City weather forecast by day

Below are the detailed weather forecasts for Sioux City for the next 5 days.

Sioux City weather for Tuesday 1st September 2026

Expect isolated thunderstorms in Sioux City, Iowa with a maximum temperature of 32°C, high levels of heat & humidity, maximum UV of 7 (High) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 36% chance of some rain and a light breeze of 9 kph from the east.

32
°C maximum temperature
23
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
7
UV index (High)
36
% chance of some rain
<5
mm of rainfall expected
H
high heat & humidity
9
kph wind from E

Sioux City weather for Wednesday 2nd September 2026

Expect isolated thunderstorms in Sioux City, Iowa with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 35% chance of some rain and a light breeze of 8 kph from the north-east.

31
°C maximum temperature
22
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
6
UV index (High)
35
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
8
kph wind from NE

Sioux City weather for Thursday 3rd September 2026

Expect isolated thunderstorms in Sioux City, Iowa with a maximum temperature of 34°C, high levels of heat & humidity, maximum UV of 7 (High) and 10 hours of bright sunshine. There are 2-5 mm of rainfall expected with 31% chance of some rain and a gentle breeze of 16 kph from the south.

34
°C maximum temperature
23
°C minimum temperature
isolated thunderstorms
10
hours of sunshine
7
UV index (High)
31
% chance of some rain
<5
mm of rainfall expected
H
high heat & humidity
16
kph wind from S

Sioux City weather for Friday 4th September 2026

Expect isolated thunderstorms in Sioux City, Iowa with a maximum temperature of 35°C, high levels of heat & humidity, maximum UV of 7 (High) and 9 hours of bright sunshine. There are 0-2 mm of rainfall expected with 30% chance of some rain and a gentle breeze of 16 kph from the south.

35
°C maximum temperature
25
°C minimum temperature
isolated thunderstorms
9
hours of sunshine
7
UV index (High)
30
% chance of some rain
<2
mm of rainfall expected
H
high heat & humidity
16
kph wind from S

Sioux City weather for Saturday 5th September 2026

Expect isolated thunderstorms in Sioux City, Iowa with a maximum temperature of 33°C, high levels of heat & humidity, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 27% chance of some rain and a light breeze of 10 kph from the south.