S
M
T
W
T
F
S
26
81°
64°
27
76°
59°
28
77°
64°
29
74°
65°
30
78°
65°
1
79°
64°
2
79°
66°
3
80°
66°
4
81°
65°
5
79°
59°
6
74°
59°
7
75°
60°
8
76°
61°
9
77°
64°
10
79°
65°
11
79°
66°
12
80°
67°
13
80°
68°
14
79°
68°
15
80°
69°
16
79°
69°
17
80°
68°
18
81°
69°
19
81°
70°
20
78°
70°
21
79°
69°
22
79°
66°
23
80°
68°
24
80°
68°
25
85°
68°
26
82°
71°
27
84°
68°
28
85°
71°
29
87°
72°
30
86°
71°
31
85°
70°
1
88°
72°
2
89°
70°
3
87°
68°
4
83°
67°
5
84°
69°
6
87°
69°
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 74° to 89°, with overnight lows between 59° and 72°. The average high for May is 81° with an average low of 67°. 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.
