S
M
T
W
T
F
S
26
64°
50°
27
64°
51°
28
72°
47°
29
74°
50°
30
74°
53°
1
77°
55°
2
77°
55°
3
65°
54°
4
64°
52°
5
62°
52°
6
74°
49°
7
80°
54°
8
78°
55°
9
82°
55°
10
83°
55°
11
90°
58°
12
70°
56°
13
74°
57°
14
73°
54°
15
73°
57°
16
73°
56°
17
75°
52°
18
82°
55°
19
85°
58°
20
85°
57°
21
82°
57°
22
77°
57°
23
78°
56°
24
77°
57°
25
74°
56°
26
77°
56°
27
81°
58°
28
80°
55°
29
75°
51°
30
78°
52°
31
81°
56°
1
84°
57°
2
84°
59°
3
85°
59°
4
83°
54°
5
77°
54°
6
80°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Montclair
Montclair's May 2026 forecast shows daily high temperatures ranging from 73° to 85°, with overnight lows between 51° and 59°. The average high for May is 79° with an average low of 56°. 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 Montclair. See also: June | July | August.
