S
M
T
W
T
F
S
26
63°
50°
27
70°
50°
28
71°
46°
29
71°
46°
30
72°
49°
1
73°
51°
2
76°
45°
3
81°
52°
4
76°
54°
5
74°
50°
6
72°
52°
7
79°
46°
8
88°
51°
9
88°
57°
10
84°
57°
11
93°
52°
12
97°
62°
13
92°
58°
14
94°
56°
15
93°
61°
16
93°
55°
17
80°
49°
18
77°
51°
19
87°
57°
20
91°
62°
21
91°
60°
22
88°
59°
23
86°
58°
24
89°
58°
25
86°
56°
26
84°
57°
27
79°
51°
28
80°
57°
29
81°
59°
30
85°
63°
31
82°
58°
1
82°
59°
2
83°
60°
3
87°
63°
4
93°
64°
5
94°
66°
6
93°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Lake Powell
Lake Powell's May 2026 forecast shows daily high temperatures ranging from 77° to 97°, with overnight lows between 49° and 66°. The average high for May is 87° with an average low of 59°. 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 Lake Powell. See also: June | July | August.