S
M
T
W
T
F
S
26
84°
74°
27
94°
76°
28
92°
73°
29
87°
75°
30
84°
76°
1
85°
77°
2
86°
65°
3
81°
66°
4
81°
69°
5
85°
71°
6
87°
73°
7
86°
72°
8
85°
70°
9
86°
72°
10
86°
72°
11
85°
71°
12
86°
71°
13
87°
72°
14
85°
71°
15
86°
70°
16
84°
69°
17
85°
70°
18
84°
73°
19
86°
73°
20
88°
72°
21
84°
73°
22
84°
71°
23
83°
69°
24
84°
71°
25
85°
74°
26
86°
74°
27
85°
73°
28
85°
74°
29
86°
73°
30
85°
74°
31
86°
75°
1
85°
75°
2
86°
74°
3
85°
76°
4
86°
76°
5
86°
74°
6
87°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Treasure Island
Treasure Island's May 2026 forecast shows daily high temperatures ranging from 81° to 88°, with overnight lows between 65° and 76°. The average high for May is 85° with an average low of 72°. 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 Treasure Island. See also: June | July | August.
