S
M
T
W
T
F
S
26
54°
29°
27
57°
23°
28
63°
24°
29
67°
25°
30
71°
32°
1
76°
34°
2
73°
41°
3
74°
46°
4
77°
34°
5
76°
40°
6
79°
36°
7
78°
33°
8
74°
33°
9
79°
33°
10
82°
36°
11
84°
37°
12
82°
39°
13
61°
33°
14
76°
35°
15
70°
43°
16
59°
37°
17
57°
39°
18
66°
39°
19
74°
39°
20
79°
43°
21
81°
44°
22
80°
43°
23
79°
42°
24
76°
44°
25
73°
42°
26
74°
44°
27
71°
40°
28
65°
41°
29
65°
42°
30
66°
42°
31
74°
45°
1
75°
46°
2
75°
46°
3
74°
45°
4
66°
38°
5
66°
37°
6
67°
39°
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 57° to 81°, with overnight lows between 35° and 46°. The average high for May is 71° with an average low of 41°. 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.