S
M
T
W
T
F
S
26
31°
15°
27
30°
18°
28
37°
16°
29
36°
20°
30
43°
20°
1
53°
22°
2
55°
28°
3
55°
27°
4
47°
27°
5
34°
19°
6
48°
13°
7
49°
33°
8
54°
23°
9
47°
29°
10
61°
22°
11
63°
42°
12
64°
37°
13
68°
35°
14
51°
32°
15
48°
28°
16
40°
18°
17
32°
17°
18
31°
19°
19
42°
18°
20
46°
22°
21
36°
26°
22
48°
20°
23
54°
34°
24
57°
40°
25
60°
44°
26
52°
37°
27
50°
39°
28
63°
39°
29
64°
36°
30
61°
34°
31
66°
37°
1
69°
39°
2
71°
40°
3
72°
41°
4
71°
40°
5
59°
32°
6
63°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Big Sky
Big Sky's May 2026 forecast shows daily high temperatures ranging from 50° to 72°, with overnight lows between 32° and 44°. The average high for May is 62° with an average low of 38°. 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 Big Sky. See also: June | July | August.
