S
M
T
W
T
F
S
26
80°
66°
27
81°
70°
28
82°
74°
29
82°
66°
30
77°
67°
1
67°
55°
2
73°
52°
3
76°
47°
4
76°
51°
5
79°
58°
6
80°
73°
7
80°
67°
8
72°
65°
9
73°
64°
10
80°
64°
11
81°
67°
12
82°
68°
13
86°
64°
14
88°
61°
15
81°
59°
16
82°
65°
17
82°
67°
18
84°
74°
19
84°
75°
20
85°
73°
21
85°
71°
22
81°
68°
23
84°
68°
24
82°
72°
25
79°
71°
26
85°
71°
27
86°
77°
28
85°
74°
29
86°
73°
30
87°
76°
31
88°
77°
1
89°
75°
2
89°
74°
3
88°
75°
4
85°
74°
5
85°
74°
6
84°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Bay St. Louis
Bay St. Louis's May 2026 forecast shows daily high temperatures ranging from 84° to 89°, with overnight lows between 74° and 77°. The average high for May is 87° with an average low of 75°. 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 Bay St. Louis. See also: June | July | August.
