S
M
T
W
T
F
S
26
63°
32°
27
61°
33°
28
61°
27°
29
48°
38°
30
53°
38°
1
54°
41°
2
58°
36°
3
48°
33°
4
56°
37°
5
56°
38°
6
55°
46°
7
60°
40°
8
55°
31°
9
57°
29°
10
55°
45°
11
62°
46°
12
56°
37°
13
56°
36°
14
66°
44°
15
66°
38°
16
72°
38°
17
79°
46°
18
66°
44°
19
63°
47°
20
85°
46°
21
62°
35°
22
64°
29°
23
62°
27°
24
62°
46°
25
54°
47°
26
71°
47°
27
66°
45°
28
54°
43°
29
47°
40°
30
48°
38°
31
58°
40°
1
57°
41°
2
64°
42°
3
66°
47°
4
65°
48°
5
65°
48°
6
66°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grand Bay-Westfield
Grand Bay-Westfield's May 2026 forecast shows daily high temperatures ranging from 47° to 71°, with overnight lows between 38° and 48°. The average high for May is 60° with an average low of 44°. 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 Grand Bay-Westfield. See also: June | July | August.