S
M
T
W
T
F
S
26
75°
54°
27
70°
47°
28
60°
45°
29
60°
41°
30
61°
38°
1
60°
37°
2
61°
36°
3
72°
48°
4
82°
53°
5
56°
46°
6
58°
41°
7
69°
39°
8
69°
43°
9
78°
49°
10
69°
38°
11
78°
43°
12
82°
56°
13
74°
47°
14
78°
47°
15
87°
60°
16
83°
62°
17
81°
61°
18
77°
61°
19
-100°
-100°
20
64°
49°
21
63°
52°
22
60°
52°
23
73°
53°
24
78°
56°
25
81°
60°
26
79°
60°
27
75°
59°
28
75°
59°
29
78°
60°
30
79°
63°
31
77°
61°
1
76°
61°
2
78°
56°
3
79°
62°
4
76°
61°
5
73°
58°
6
72°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sun Valley Lake
Sun Valley Lake's May 2026 forecast shows daily high temperatures ranging from 60° to 81°, with overnight lows between 49° and 63°. The average high for May is 74° 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 Sun Valley Lake. See also: June | July | August.
