S
M
T
W
T
F
S
26
59°
34°
27
61°
33°
28
65°
36°
29
68°
48°
30
70°
43°
1
74°
48°
2
80°
52°
3
81°
49°
4
79°
44°
5
72°
41°
6
73°
47°
7
73°
45°
8
70°
39°
9
71°
37°
10
75°
41°
11
79°
43°
12
82°
45°
13
82°
45°
14
79°
44°
15
71°
40°
16
70°
39°
17
67°
35°
18
65°
30°
19
59°
29°
20
62°
30°
21
71°
40°
22
73°
42°
23
70°
38°
24
72°
41°
25
73°
42°
26
74°
42°
27
73°
41°
28
67°
39°
29
67°
37°
30
71°
42°
31
74°
43°
1
76°
44°
2
77°
45°
3
77°
45°
4
76°
44°
5
76°
44°
6
75°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Idaho City
Idaho City's May 2026 forecast shows daily high temperatures ranging from 59° to 82°, with overnight lows between 29° and 47°. The average high for May is 73° 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 Idaho City. See also: June | July | August.
