S
M
T
W
T
F
S
26
63°
51°
27
69°
49°
28
77°
47°
29
81°
49°
30
87°
50°
1
83°
53°
2
82°
58°
3
72°
55°
4
66°
54°
5
68°
54°
6
78°
57°
7
79°
59°
8
84°
58°
9
92°
61°
10
89°
63°
11
94°
66°
12
95°
66°
13
90°
62°
14
86°
61°
15
84°
59°
16
81°
57°
17
79°
57°
18
77°
58°
19
80°
56°
20
74°
52°
21
75°
54°
22
75°
53°
23
78°
58°
24
81°
60°
25
82°
58°
26
76°
55°
27
78°
57°
28
79°
59°
29
83°
63°
30
86°
63°
31
88°
64°
1
88°
65°
2
87°
64°
3
86°
61°
4
84°
64°
5
81°
62°
6
79°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Shasta Lake
Shasta Lake's May 2026 forecast shows daily high temperatures ranging from 74° to 95°, with overnight lows between 52° and 66°. The average high for May is 83° with an average low of 60°. 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 Shasta Lake. See also: June | July | August.
