S
M
T
W
T
F
S
27
75°
57°
28
77°
54°
29
74°
55°
30
73°
57°
1
75°
54°
2
76°
46°
3
73°
44°
4
62°
42°
5
61°
45°
6
63°
48°
7
65°
52°
8
68°
43°
9
69°
42°
10
70°
51°
11
68°
47°
12
59°
44°
13
64°
43°
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 59° to 77°, with overnight lows between 42° and 57°. The average high for October is 69° with an average low of 48°. 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.
