S
M
T
W
T
F
S
30
83°
56°
31
78°
68°
1
90°
68°
2
73°
67°
3
88°
69°
4
86°
73°
5
81°
68°
6
79°
59°
7
81°
55°
8
83°
54°
9
86°
60°
10
85°
73°
11
78°
61°
12
61°
54°
13
80°
67°
14
78°
55°
15
74°
55°
16
82°
63°
17
86°
67°
18
85°
64°
19
79°
60°
20
78°
60°
21
72°
55°
22
71°
55°
23
72°
54°
24
72°
53°
25
75°
55°
26
74°
56°
27
73°
57°
28
77°
56°
29
76°
54°
30
70°
51°
1
68°
52°
2
70°
54°
3
75°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Matawan
Matawan's September 2026 forecast shows daily high temperatures ranging from 68° to 86°, with overnight lows between 51° and 67°. The average high for September is 75° 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 September weather will actually feel in Matawan. See also: October | November | December.