S
M
T
W
T
F
S
30
89°
71°
31
90°
68°
1
89°
65°
2
91°
68°
3
94°
70°
4
96°
70°
5
95°
69°
6
92°
66°
7
84°
66°
8
84°
61°
9
82°
60°
10
82°
57°
11
78°
53°
12
79°
54°
13
79°
55°
14
77°
50°
15
82°
57°
16
81°
56°
17
82°
58°
18
80°
56°
19
81°
54°
20
80°
56°
21
82°
56°
22
82°
57°
23
81°
56°
24
81°
56°
25
80°
55°
26
79°
55°
27
80°
54°
28
80°
54°
29
79°
53°
30
79°
55°
1
78°
54°
2
78°
53°
3
77°
52°
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 77° to 96°, with overnight lows between 50° and 70°. The average high for September is 83° 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 Westfield. See also: October | November | December.
