S
M
T
W
T
F
S
30
82°
54°
31
79°
62°
1
75°
62°
2
74°
65°
3
81°
63°
4
86°
59°
5
79°
56°
6
73°
58°
7
76°
59°
8
75°
56°
9
73°
57°
10
75°
58°
11
77°
60°
12
77°
58°
13
76°
56°
14
74°
55°
15
71°
53°
16
70°
58°
17
74°
54°
18
69°
51°
19
69°
50°
20
70°
54°
21
74°
58°
22
76°
58°
23
77°
57°
24
76°
55°
25
74°
54°
26
74°
55°
27
75°
56°
28
75°
55°
29
74°
51°
30
65°
47°
1
64°
46°
2
66°
53°
3
72°
54°
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 64° to 86°, with overnight lows between 46° and 65°. The average high for September is 74° 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 Westfield. See also: October | November | December.
