S
M
T
W
T
F
S
26
56°
36°
27
43°
37°
28
49°
32°
29
41°
28°
30
44°
26°
1
54°
20°
2
64°
22°
3
66°
31°
4
59°
31°
5
38°
25°
6
40°
25°
7
53°
24°
8
59°
31°
9
51°
26°
10
46°
33°
11
60°
39°
12
65°
40°
13
64°
43°
14
63°
40°
15
61°
38°
16
64°
40°
17
60°
39°
18
66°
41°
19
61°
46°
20
62°
41°
21
58°
37°
22
59°
38°
23
61°
39°
24
59°
38°
25
60°
40°
26
60°
41°
27
61°
40°
28
61°
40°
29
64°
48°
30
62°
46°
31
66°
51°
1
72°
52°
2
73°
53°
3
74°
53°
4
74°
54°
5
75°
54°
6
73°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Bigfork
Bigfork's May 2026 forecast shows daily high temperatures ranging from 38° to 75°, with overnight lows between 24° and 54°. The average high for May is 61° 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 Bigfork. See also: June | July | August.