S
M
T
W
T
F
S
27
77°
56°
28
76°
55°
29
76°
55°
30
75°
54°
1
75°
51°
2
68°
53°
3
74°
53°
4
75°
55°
5
74°
54°
6
72°
54°
7
72°
53°
8
73°
54°
9
73°
53°
10
72°
51°
11
72°
45°
12
59°
40°
13
58°
38°
14
57°
37°
15
57°
37°
16
58°
43°
17
57°
36°
18
55°
36°
19
55°
37°
20
56°
41°
21
55°
39°
22
55°
38°
23
70°
43°
24
69°
40°
25
58°
37°
26
54°
35°
27
51°
29°
28
49°
32°
29
51°
43°
30
55°
44°
31
59°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Decatur
Decatur's October 2026 forecast shows daily high temperatures ranging from 49° to 77°, with overnight lows between 29° and 56°. The average high for October is 64° with an average low of 44°. 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 Decatur. See also: November | December | January.
