S
M
T
W
T
F
S
27
77°
47°
28
77°
44°
29
82°
45°
30
84°
65°
1
88°
64°
2
72°
45°
3
73°
42°
4
78°
45°
5
73°
44°
6
75°
41°
7
83°
49°
8
80°
50°
9
82°
53°
10
83°
57°
11
74°
54°
12
82°
57°
13
68°
47°
14
59°
47°
15
62°
46°
16
60°
45°
17
62°
48°
18
62°
46°
19
65°
47°
20
64°
44°
21
57°
47°
22
57°
45°
23
55°
39°
24
58°
43°
25
62°
47°
26
66°
44°
27
62°
40°
28
53°
36°
29
53°
42°
30
56°
44°
31
64°
47°
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 53° to 83°, with overnight lows between 36° and 57°. The average high for October is 65° with an average low of 47°. 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.
