S
M
T
W
T
F
S
27
72°
64°
28
73°
61°
29
68°
60°
30
72°
64°
1
69°
49°
2
70°
41°
3
80°
45°
4
73°
44°
5
81°
40°
6
88°
52°
7
79°
47°
8
82°
42°
9
86°
56°
10
93°
65°
11
91°
57°
12
87°
51°
13
63°
46°
14
58°
39°
15
54°
48°
16
55°
32°
17
63°
27°
18
73°
42°
19
70°
40°
20
74°
40°
21
81°
45°
22
81°
49°
23
79°
60°
24
71°
48°
25
65°
45°
26
60°
44°
27
64°
45°
28
68°
50°
29
69°
46°
30
64°
47°
31
58°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Sioux City
Sioux City's October 2026 forecast shows daily high temperatures ranging from 58° to 71°, with overnight lows between 39° and 50°. The average high for October is 65° with an average low of 46°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Sioux City. See also: November | December | January.
