S
M
T
W
T
F
S
30
85°
64°
31
89°
65°
1
94°
75°
2
92°
73°
3
93°
73°
4
94°
72°
5
91°
70°
6
79°
59°
7
81°
56°
8
87°
57°
9
88°
66°
10
78°
61°
11
83°
58°
12
83°
65°
13
82°
58°
14
76°
52°
15
94°
61°
16
90°
69°
17
90°
70°
18
78°
62°
19
86°
67°
20
78°
61°
21
73°
57°
22
68°
57°
23
71°
54°
24
74°
55°
25
71°
52°
26
73°
50°
27
74°
56°
28
76°
54°
29
73°
53°
30
74°
49°
1
75°
55°
2
72°
54°
3
67°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Westfield
Westfield's September 2026 forecast shows daily high temperatures ranging from 67° to 90°, with overnight lows between 49° and 70°. The average high for September is 75° with an average low of 57°. 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 Westfield. See also: October | November | December.
