S
M
T
W
T
F
S
26
83°
76°
27
84°
77°
28
84°
76°
29
83°
75°
30
84°
74°
1
76°
58°
2
74°
56°
3
76°
63°
4
79°
67°
5
83°
74°
6
82°
76°
7
78°
67°
8
76°
68°
9
87°
74°
10
84°
75°
11
80°
71°
12
83°
69°
13
84°
71°
14
87°
73°
15
83°
74°
16
84°
78°
17
85°
79°
18
84°
79°
19
85°
78°
20
83°
76°
21
84°
73°
22
85°
75°
23
83°
75°
24
84°
74°
25
86°
75°
26
82°
76°
27
86°
74°
28
85°
76°
29
85°
77°
30
83°
76°
31
82°
76°
1
84°
75°
2
84°
77°
3
85°
77°
4
83°
76°
5
83°
77°
6
84°
77°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in San Leon
San Leon's May 2026 forecast shows daily high temperatures ranging from 82° to 87°, with overnight lows between 73° and 79°. The average high for May is 84° 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 San Leon. See also: June | July | August.