S
M
T
W
T
F
S
26
59°
37°
27
57°
28°
28
50°
25°
29
52°
26°
30
57°
30°
1
51°
26°
2
49°
25°
3
50°
25°
4
52°
24°
5
53°
26°
6
56°
30°
7
62°
30°
8
64°
32°
9
64°
31°
10
65°
37°
11
65°
32°
12
59°
28°
13
52°
27°
14
51°
26°
15
54°
27°
16
56°
28°
17
57°
28°
18
55°
30°
19
56°
28°
20
58°
29°
21
66°
31°
22
67°
37°
23
59°
34°
24
59°
30°
25
66°
32°
26
67°
31°
27
71°
38°
28
72°
36°
29
71°
36°
30
75°
42°
31
76°
43°
1
75°
38°
2
76°
45°
3
77°
46°
4
77°
42°
5
76°
44°
6
76°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mammoth
Mammoth's May 2026 forecast shows daily high temperatures ranging from 49° to 77°, with overnight lows between 24° and 46°. The average high for May is 62° with an average low of 33°. 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 Mammoth. See also: June | July | August.