S
M
T
W
T
F
S
27
86°
51°
28
85°
47°
29
87°
47°
30
92°
51°
1
92°
61°
2
92°
65°
3
84°
68°
4
80°
67°
5
87°
60°
6
85°
51°
7
86°
53°
8
91°
52°
9
82°
55°
10
69°
60°
11
77°
55°
12
88°
58°
13
89°
58°
14
91°
61°
15
89°
62°
16
84°
51°
17
65°
48°
18
65°
50°
19
68°
54°
20
74°
57°
21
73°
56°
22
74°
53°
23
75°
53°
24
71°
48°
25
66°
50°
26
70°
50°
27
72°
49°
28
67°
43°
29
63°
44°
30
64°
47°
31
69°
51°
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 63° to 91°, with overnight lows between 43° and 62°. The average high for October is 74° with an average low of 52°. 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.
