S
M
T
W
T
F
S
26
76°
57°
27
78°
56°
28
84°
56°
29
89°
62°
30
93°
63°
1
93°
68°
2
96°
67°
3
96°
68°
4
80°
65°
5
79°
59°
6
88°
60°
7
99°
67°
8
103°
73°
9
105°
78°
10
107°
75°
11
109°
75°
12
107°
82°
13
100°
75°
14
99°
76°
15
100°
77°
16
96°
73°
17
92°
70°
18
83°
67°
19
86°
66°
20
94°
65°
21
97°
66°
22
98°
73°
23
97°
65°
24
98°
64°
25
95°
65°
26
95°
64°
27
91°
58°
28
88°
56°
29
103°
59°
30
106°
60°
31
110°
62°
1
108°
64°
2
112°
62°
3
110°
61°
4
106°
62°
5
101°
70°
6
97°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Alamo Lake State Park
Alamo Lake State Park's May 2026 forecast shows daily high temperatures ranging from 88° to 112°, with overnight lows between 56° and 70°. The average high for May is 101° with an average low of 63°. 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 Alamo Lake State Park. See also: June | July | August.