S
M
T
W
T
F
S
26
35°
23°
27
45°
22°
28
54°
21°
29
50°
31°
30
60°
28°
1
69°
25°
2
72°
29°
3
72°
34°
4
55°
37°
5
47°
23°
6
67°
19°
7
63°
41°
8
72°
34°
9
64°
35°
10
80°
32°
11
80°
52°
12
76°
35°
13
90°
38°
14
70°
46°
15
67°
41°
16
64°
32°
17
45°
33°
18
46°
25°
19
61°
38°
20
60°
38°
21
52°
34°
22
64°
41°
23
75°
47°
24
80°
51°
25
82°
47°
26
70°
43°
27
76°
44°
28
84°
47°
29
78°
48°
30
77°
48°
31
80°
51°
1
70°
44°
2
66°
43°
3
70°
48°
4
75°
48°
5
70°
47°
6
66°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Big Timber
Big Timber's May 2026 forecast shows daily high temperatures ranging from 52° to 84°, with overnight lows between 34° and 51°. The average high for May is 71° 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 Big Timber. See also: June | July | August.