S
M
T
W
T
F
S
26
54°
40°
27
59°
35°
28
66°
30°
29
72°
35°
30
77°
39°
1
76°
45°
2
73°
44°
3
71°
47°
4
60°
48°
5
74°
46°
6
79°
48°
7
77°
49°
8
71°
45°
9
70°
43°
10
82°
47°
11
80°
47°
12
81°
48°
13
80°
48°
14
78°
45°
15
62°
38°
16
62°
41°
17
63°
40°
18
62°
42°
19
61°
37°
20
63°
38°
21
64°
38°
22
65°
41°
23
66°
42°
24
69°
42°
25
73°
45°
26
73°
46°
27
71°
44°
28
69°
45°
29
67°
43°
30
66°
44°
31
65°
44°
1
65°
42°
2
68°
46°
3
68°
46°
4
67°
44°
5
67°
48°
6
68°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mount Shasta
Mount Shasta's May 2026 forecast shows daily high temperatures ranging from 60° to 82°, with overnight lows between 37° and 49°. The average high for May is 70° with an average low of 44°. 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 Mount Shasta. See also: June | July | August.
