S
M
T
W
T
F
S
27
77°
47°
28
77°
44°
29
82°
45°
30
84°
65°
1
88°
64°
2
72°
48°
3
73°
47°
4
76°
46°
5
71°
44°
6
70°
46°
7
75°
54°
8
78°
55°
9
76°
57°
10
82°
59°
11
76°
56°
12
72°
52°
13
71°
50°
14
69°
51°
15
72°
52°
16
65°
46°
17
70°
52°
18
70°
51°
19
60°
47°
20
62°
50°
21
57°
47°
22
57°
45°
23
64°
48°
24
56°
42°
25
54°
43°
26
62°
44°
27
55°
43°
28
63°
48°
29
65°
49°
30
62°
50°
31
63°
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 54° to 82°, with overnight lows between 42° and 59°. The average high for October is 67° with an average low of 49°. 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.
