S
M
T
W
T
F
S
26
65°
41°
27
58°
37°
28
60°
42°
29
61°
40°
30
65°
38°
1
60°
38°
2
60°
37°
3
59°
39°
4
60°
41°
5
61°
40°
6
60°
40°
7
61°
41°
8
66°
42°
9
63°
41°
10
62°
40°
11
62°
41°
12
63°
43°
13
71°
52°
14
72°
50°
15
66°
50°
16
74°
51°
17
70°
47°
18
68°
45°
19
67°
45°
20
72°
52°
21
74°
48°
22
68°
45°
23
67°
46°
24
69°
47°
25
71°
49°
26
77°
54°
27
78°
54°
28
80°
49°
29
72°
49°
30
73°
53°
31
71°
54°
1
74°
50°
2
73°
49°
3
73°
48°
4
71°
50°
5
73°
51°
6
76°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mendham
Mendham's May 2026 forecast shows daily high temperatures ranging from 58° to 80°, with overnight lows between 37° and 58°. The average high for May is 68° with an average low of 46°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Mendham. See also: June | July | August.
