S
M
T
W
T
F
S
30
80°
61°
31
79°
71°
1
85°
69°
2
72°
67°
3
88°
69°
4
87°
73°
5
80°
64°
6
74°
61°
7
82°
61°
8
84°
65°
9
88°
72°
10
89°
66°
11
80°
60°
12
81°
65°
13
84°
64°
14
80°
62°
15
83°
66°
16
82°
65°
17
80°
62°
18
78°
58°
19
79°
59°
20
79°
60°
21
76°
61°
22
70°
61°
23
70°
60°
24
71°
60°
25
72°
57°
26
75°
56°
27
71°
53°
28
71°
57°
29
76°
59°
30
76°
59°
1
75°
58°
2
75°
59°
3
74°
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 70° to 89°, with overnight lows between 53° and 72°. The average high for September is 78° with an average low of 61°. 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.
