S
M
T
W
T
F
S
26
82°
63°
27
73°
56°
28
69°
52°
29
83°
61°
30
79°
68°
1
70°
60°
2
63°
53°
3
73°
47°
4
79°
50°
5
82°
56°
6
88°
58°
7
79°
65°
8
74°
62°
9
79°
62°
10
84°
65°
11
81°
54°
12
75°
54°
13
79°
60°
14
80°
58°
15
81°
61°
16
86°
64°
17
84°
64°
18
87°
67°
19
89°
68°
20
88°
67°
21
89°
65°
22
86°
68°
23
81°
68°
24
81°
67°
25
83°
68°
26
84°
69°
27
83°
69°
28
84°
68°
29
84°
70°
30
81°
70°
31
83°
69°
1
84°
70°
2
85°
71°
3
86°
71°
4
85°
72°
5
85°
72°
6
86°
71°
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 74° to 89°, with overnight lows between 54° and 72°. The average high for May is 83° with an average low of 66°. 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.
