S
M
T
W
T
F
S
26
82°
57°
27
82°
57°
28
71°
61°
29
81°
64°
30
72°
58°
1
64°
55°
2
69°
46°
3
71°
41°
4
79°
43°
5
79°
49°
6
80°
66°
7
72°
58°
8
67°
54°
9
72°
56°
10
78°
61°
11
79°
62°
12
74°
59°
13
81°
54°
14
77°
50°
15
81°
44°
16
84°
51°
17
89°
60°
18
89°
66°
19
N/A
20
86°
66°
21
84°
66°
22
82°
67°
23
81°
67°
24
87°
67°
25
87°
66°
26
84°
68°
27
83°
67°
28
85°
67°
29
83°
68°
30
84°
66°
31
86°
67°
1
85°
66°
2
86°
63°
3
85°
66°
4
84°
65°
5
86°
67°
6
88°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Westfield
Westfield's May 2026 forecast shows daily high temperatures ranging from 81° to 88°, with overnight lows between 63° and 68°. The average high for May is 85° with an average low of 66°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Westfield. See also: June | July | August.