S
M
T
W
T
F
S
26
82°
63°
27
73°
56°
28
69°
52°
29
83°
61°
30
N/A
1
68°
57°
2
63°
49°
3
72°
48°
4
78°
54°
5
82°
63°
6
80°
59°
7
80°
53°
8
74°
54°
9
79°
60°
10
75°
61°
11
81°
62°
12
84°
64°
13
80°
63°
14
83°
62°
15
87°
68°
16
86°
68°
17
86°
67°
18
82°
68°
19
84°
68°
20
87°
69°
21
88°
69°
22
88°
68°
23
87°
70°
24
88°
70°
25
88°
69°
26
87°
70°
27
86°
69°
28
84°
70°
29
84°
70°
30
86°
69°
31
88°
70°
1
88°
71°
2
89°
71°
3
90°
72°
4
90°
70°
5
84°
68°
6
83°
66°
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 63° to 90°, with overnight lows between 48° and 72°. The average high for May is 83° with an average low of 65°. 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.
