S
M
T
W
T
F
S
27
N/A
28
N/A
29
86°
49°
30
94°
65°
1
92°
68°
2
73°
54°
3
76°
49°
4
81°
45°
5
77°
45°
6
80°
42°
7
90°
48°
8
86°
48°
9
90°
48°
10
83°
50°
11
86°
47°
12
93°
56°
13
94°
63°
14
81°
65°
15
82°
57°
16
59°
51°
17
59°
38°
18
67°
35°
19
72°
36°
20
74°
45°
21
74°
46°
22
79°
47°
23
77°
48°
24
76°
49°
25
77°
52°
26
76°
53°
27
70°
48°
28
66°
43°
29
62°
46°
30
64°
47°
31
60°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Granite City
Granite City's October 2026 forecast shows daily high temperatures ranging from 60° to 79°, with overnight lows between 43° and 53°. The average high for October is 71° with an average low of 48°. 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 Granite City. See also: November | December | January.
