S
M
T
W
T
F
S
26
88°
72°
27
89°
72°
28
88°
71°
29
86°
72°
30
87°
68°
31
82°
66°
1
81°
66°
2
82°
69°
3
83°
71°
4
82°
69°
5
83°
67°
6
85°
71°
7
88°
72°
8
86°
71°
9
85°
70°
10
85°
65°
11
84°
64°
12
84°
65°
13
83°
70°
14
87°
71°
15
88°
70°
16
88°
72°
17
89°
71°
18
88°
69°
19
87°
63°
20
81°
63°
21
80°
64°
22
80°
62°
23
81°
63°
24
80°
63°
25
81°
62°
26
81°
62°
27
82°
63°
28
80°
63°
29
82°
62°
30
79°
62°
31
81°
65°
1
83°
60°
2
84°
59°
3
77°
60°
4
78°
61°
5
79°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Montclair
Montclair's August 2026 forecast shows daily high temperatures ranging from 77° to 89°, with overnight lows between 59° and 72°. The average high for August is 84° 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 August weather will actually feel in Montclair. See also: September | October | November.
