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°
44°
4
75°
42°
5
69°
38°
6
76°
44°
7
74°
43°
8
66°
42°
9
67°
42°
10
73°
41°
11
74°
43°
12
76°
47°
13
73°
46°
14
75°
47°
15
72°
44°
16
64°
42°
17
65°
45°
18
58°
39°
19
57°
37°
20
58°
37°
21
68°
41°
22
70°
48°
23
64°
43°
24
69°
47°
25
71°
49°
26
69°
46°
27
67°
46°
28
66°
45°
29
67°
43°
30
71°
47°
31
72°
50°
1
73°
50°
2
72°
51°
3
73°
51°
4
72°
50°
5
71°
49°
6
72°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Grangeville
Grangeville's May 2026 forecast shows daily high temperatures ranging from 57° to 76°, with overnight lows between 37° and 51°. 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 Grangeville. See also: June | July | August.
