S
M
T
W
T
F
S
26
31°
15°
27
30°
18°
28
37°
16°
29
36°
20°
30
43°
20°
1
55°
27°
2
49°
30°
3
49°
28°
4
40°
23°
5
28°
24°
6
52°
33°
7
63°
31°
8
61°
32°
9
56°
34°
10
56°
32°
11
51°
27°
12
56°
30°
13
57°
31°
14
52°
26°
15
44°
22°
16
46°
22°
17
47°
23°
18
50°
28°
19
47°
28°
20
45°
27°
21
47°
27°
22
48°
25°
23
46°
24°
24
47°
23°
25
48°
23°
26
49°
24°
27
53°
26°
28
58°
33°
29
59°
33°
30
53°
32°
31
59°
33°
1
56°
33°
2
54°
29°
3
56°
32°
4
58°
35°
5
56°
36°
6
56°
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 28° to 63°, with overnight lows between 22° and 37°. The average high for May is 52° with an average low of 29°. 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.
