S
M
T
W
T
F
S
27
73°
46°
28
76°
45°
29
79°
48°
30
64°
59°
1
68°
49°
2
65°
42°
3
67°
47°
4
69°
41°
5
65°
42°
6
65°
47°
7
71°
50°
8
70°
49°
9
67°
45°
10
64°
46°
11
65°
43°
12
64°
44°
13
64°
46°
14
63°
42°
15
57°
44°
16
67°
47°
17
67°
47°
18
66°
46°
19
60°
41°
20
54°
39°
21
53°
36°
22
53°
39°
23
63°
46°
24
64°
45°
25
63°
42°
26
52°
39°
27
51°
38°
28
59°
42°
29
56°
38°
30
56°
43°
31
60°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in DeKalb
DeKalb's October 2026 forecast shows daily high temperatures ranging from 51° to 71°, with overnight lows between 36° and 50°. The average high for October is 62° with an average low of 43°. 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 DeKalb. See also: November | December | January.
