S
M
T
W
T
F
S
27
65°
59°
28
63°
58°
29
71°
61°
30
74°
63°
1
78°
66°
2
86°
68°
3
72°
62°
4
64°
57°
5
70°
57°
6
63°
51°
7
67°
51°
8
76°
58°
9
73°
59°
10
70°
59°
11
63°
55°
12
72°
55°
13
73°
61°
14
80°
66°
15
66°
57°
16
75°
60°
17
63°
46°
18
60°
43°
19
64°
49°
20
71°
53°
21
64°
50°
22
68°
51°
23
62°
50°
24
63°
48°
25
67°
49°
26
71°
49°
27
59°
43°
28
61°
49°
29
66°
55°
30
74°
51°
31
65°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Mount Vernon
Mount Vernon's October 2026 forecast shows daily high temperatures ranging from 59° to 74°, with overnight lows between 43° and 55°. The average high for October is 66° 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 Vernon. See also: November | December | January.
