S
M
T
W
T
F
S
26
79°
52°
27
79°
41°
28
81°
43°
29
77°
50°
30
73°
52°
1
73°
50°
2
72°
50°
3
79°
54°
4
81°
50°
5
74°
45°
6
79°
47°
7
84°
50°
8
90°
56°
9
95°
55°
10
97°
61°
11
99°
66°
12
97°
65°
13
93°
63°
14
93°
60°
15
93°
60°
16
91°
56°
17
90°
56°
18
89°
52°
19
92°
58°
20
92°
58°
21
93°
57°
22
90°
58°
23
92°
59°
24
93°
59°
25
91°
58°
26
91°
59°
27
92°
60°
28
87°
59°
29
88°
58°
30
87°
59°
31
88°
60°
1
88°
60°
2
90°
61°
3
91°
60°
4
89°
61°
5
89°
62°
6
92°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in San Simon
San Simon's May 2026 forecast shows daily high temperatures ranging from 74° to 99°, with overnight lows between 45° and 66°. The average high for May is 90° with an average low of 58°. 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 Simon. See also: June | July | August.