S
M
T
W
T
F
S
27
62°
56°
28
66°
58°
29
69°
59°
30
74°
52°
1
74°
59°
2
83°
58°
3
70°
51°
4
60°
47°
5
67°
42°
6
61°
37°
7
66°
35°
8
72°
38°
9
71°
39°
10
69°
49°
11
63°
54°
12
69°
55°
13
73°
43°
14
57°
38°
15
57°
37°
16
59°
41°
17
57°
43°
18
58°
39°
19
62°
40°
20
62°
41°
21
63°
38°
22
54°
42°
23
54°
33°
24
53°
32°
25
54°
36°
26
60°
39°
27
62°
31°
28
51°
31°
29
51°
30°
30
52°
33°
31
57°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Arlington Heights
Arlington Heights's October 2026 forecast shows daily high temperatures ranging from 51° to 73°, with overnight lows between 30° and 55°. The average high for October is 60° with an average low of 39°. 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 Arlington Heights. See also: November | December | January.
