S
M
T
W
T
F
S
27
70°
49°
28
75°
55°
29
69°
46°
30
68°
55°
1
70°
43°
2
74°
43°
3
70°
41°
4
60°
43°
5
61°
44°
6
62°
46°
7
66°
53°
8
69°
55°
9
66°
55°
10
71°
54°
11
73°
45°
12
70°
40°
13
58°
44°
14
57°
42°
15
56°
39°
16
57°
39°
17
58°
42°
18
60°
46°
19
64°
47°
20
63°
47°
21
65°
50°
22
66°
47°
23
67°
39°
24
59°
41°
25
60°
38°
26
59°
39°
27
58°
45°
28
52°
43°
29
52°
44°
30
Hist. Avg.
56°
39°
31
Hist. Avg.
56°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
October Weather in Arlington Heights
Arlington Heights's October 2026 forecast shows daily high temperatures ranging from 52° to 75°, with overnight lows between 38° and 55°. The average high for October is 64° with an average low of 45°. 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.
