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Precipitation
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°Fahrenheit
Monthly Historical Averages
Sioux City, IA
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September
Average Temperature
High
25°
Feels 25
Low
12°
Feels 11
Average Precipitation
9 Days
Rain amount
67.5mm
Snow amount
0.1cm
Daily Historical Averages
September 2026
S
M
T
W
T
F
S
1
2
32°
3
34°
4
32°
5
34°
6
32°
7
31°
8
32°
9
30°
10
28°
11
27°
12
27°
13
27°
14
26°
15
25°
16
26°
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Forecast
Wednesday, September 2, 2026
Day
32°
Feels 35
Wind
24 km/h S
Gust
36 km/h
Humidity
52%
P.O.P
40%
Rain
<1 mm
Night
21°
Feels 21
Wind
21 km/h SW
Gust
32 km/h
Humidity
89%
P.O.P
60%
Rain
~10 mm
Historical Averages
Sep 2
High
Feels
Low
Feels
Precip Frequency
Total Daylight
Humidity
Historical Averages are based on data recorded from 2000 onwards.