S
M
T
W
T
F
S
30
82°
63°
31
80°
68°
1
89°
67°
2
73°
67°
3
89°
71°
4
88°
69°
5
83°
63°
6
80°
55°
7
82°
55°
8
85°
60°
9
88°
60°
10
89°
71°
11
83°
60°
12
81°
68°
13
82°
65°
14
84°
60°
15
83°
68°
16
87°
64°
17
82°
62°
18
78°
57°
19
77°
56°
20
77°
60°
21
78°
58°
22
73°
57°
23
74°
54°
24
72°
58°
25
69°
49°
26
69°
51°
27
73°
57°
28
78°
55°
29
72°
50°
30
72°
55°
1
73°
55°
2
70°
50°
3
72°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Sayreville
Sayreville's September 2026 forecast shows daily high temperatures ranging from 69° to 89°, with overnight lows between 49° and 71°. The average high for September is 77° with an average low of 58°. 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 Sayreville. See also: October | November | December.
