S
M
T
W
T
F
S
26
54°
31°
27
56°
30°
28
61°
34°
29
62°
36°
30
68°
32°
1
73°
38°
2
75°
46°
3
75°
45°
4
74°
46°
5
69°
43°
6
76°
45°
7
70°
47°
8
69°
42°
9
69°
45°
10
79°
45°
11
69°
46°
12
90°
42°
13
81°
47°
14
63°
45°
15
60°
39°
16
49°
36°
17
49°
33°
18
59°
33°
19
65°
36°
20
64°
43°
21
64°
40°
22
71°
38°
23
78°
41°
24
77°
45°
25
83°
43°
26
52°
44°
27
63°
44°
28
75°
50°
29
66°
47°
30
66°
41°
31
64°
39°
1
71°
43°
2
77°
50°
3
76°
47°
4
73°
47°
5
74°
48°
6
67°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Mount Idaho
Mount Idaho's May 2026 forecast shows daily high temperatures ranging from 52° to 83°, with overnight lows between 39° and 50°. The average high for May is 70° with an average low of 45°. 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 Idaho. See also: June | July | August.
