S
M
T
W
T
F
S
26
88°
73°
27
84°
77°
28
86°
77°
29
86°
75°
30
86°
75°
1
88°
75°
2
86°
77°
3
82°
75°
4
88°
75°
5
84°
77°
6
86°
75°
7
90°
73°
8
81°
73°
9
86°
75°
10
84°
75°
11
88°
75°
12
90°
73°
13
84°
73°
14
86°
77°
15
84°
77°
16
88°
76°
17
87°
78°
18
87°
77°
19
88°
78°
20
88°
78°
21
89°
78°
22
87°
79°
23
86°
77°
24
86°
75°
25
88°
76°
26
88°
75°
27
88°
75°
28
87°
76°
29
86°
76°
30
84°
76°
31
85°
75°
1
85°
74°
2
84°
76°
3
86°
76°
4
86°
75°
5
85°
76°
6
84°
76°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in São Luís
São Luís's May 2026 forecast shows daily high temperatures ranging from 84° to 89°, with overnight lows between 74° and 79°. The average high for May is 86° with an average low of 76°. 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 São Luís. See also: June | July | August.
