S
M
T
W
T
F
S
27
74°
48°
28
67°
55°
29
66°
53°
30
74°
52°
1
71°
53°
2
69°
51°
3
65°
50°
4
68°
53°
5
70°
52°
6
69°
54°
7
72°
42°
8
64°
47°
9
67°
46°
10
Hist. Avg.
65°
47°
11
Hist. Avg.
65°
46°
12
Hist. Avg.
64°
46°
13
Hist. Avg.
64°
46°
14
Hist. Avg.
63°
45°
15
Hist. Avg.
63°
45°
16
Hist. Avg.
62°
44°
17
Hist. Avg.
62°
44°
18
Hist. Avg.
62°
44°
19
Hist. Avg.
61°
43°
20
Hist. Avg.
61°
43°
21
Hist. Avg.
60°
43°
22
Hist. Avg.
60°
42°
23
Hist. Avg.
59°
42°
24
Hist. Avg.
59°
42°
25
Hist. Avg.
58°
41°
26
Hist. Avg.
58°
41°
27
Hist. Avg.
58°
40°
28
Hist. Avg.
57°
40°
29
Hist. Avg.
57°
40°
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 Mount Prospect
Mount Prospect's October 2026 forecast shows daily high temperatures ranging from 64° to 74°, with overnight lows between 42° and 55°. The average high for October is 69° with an average low of 50°. 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 Mount Prospect. See also: November | December | January.
