S
M
T
W
T
F
S
27
72°
53°
28
74°
52°
29
74°
50°
30
68°
46°
1
67°
49°
2
68°
51°
3
72°
47°
4
71°
50°
5
71°
50°
6
64°
51°
7
71°
51°
8
70°
48°
9
65°
44°
10
60°
45°
11
66°
42°
12
61°
42°
13
65°
47°
14
68°
48°
15
69°
47°
16
68°
46°
17
68°
44°
18
58°
41°
19
57°
45°
20
60°
46°
21
66°
45°
22
65°
36°
23
53°
34°
24
53°
38°
25
57°
44°
26
65°
39°
27
57°
33°
28
56°
32°
29
59°
36°
30
61°
42°
31
63°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Mendham
Mendham's October 2026 forecast shows daily high temperatures ranging from 53° to 74°, with overnight lows between 32° and 53°. 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 Mendham. See also: November | December | January.