S
M
T
W
T
F
S
27
72°
52°
28
72°
52°
29
73°
46°
30
72°
45°
1
65°
45°
2
66°
46°
3
69°
49°
4
71°
49°
5
63°
48°
6
66°
51°
7
70°
50°
8
71°
48°
9
72°
47°
10
69°
45°
11
66°
45°
12
63°
46°
13
62°
46°
14
60°
43°
15
62°
45°
16
66°
47°
17
67°
43°
18
68°
39°
19
65°
42°
20
58°
35°
21
62°
36°
22
56°
44°
23
60°
43°
24
65°
39°
25
60°
36°
26
56°
35°
27
55°
41°
28
55°
39°
29
62°
33°
30
62°
33°
31
63°
41°
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 55° to 73°, with overnight lows between 33° and 52°. The average high for October is 65° with an average low of 44°. 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.
