S
M
T
W
T
F
S
26
32°
21°
27
32°
27°
28
41°
27°
29
41°
32°
30
43°
30°
1
52°
34°
2
61°
41°
3
59°
45°
4
52°
32°
5
32°
23°
6
46°
23°
7
54°
36°
8
57°
37°
9
46°
36°
10
63°
37°
11
73°
54°
12
64°
45°
13
77°
52°
14
73°
46°
15
71°
37°
16
65°
36°
17
46°
27°
18
39°
31°
19
57°
30°
20
57°
33°
21
68°
36°
22
75°
40°
23
68°
39°
24
66°
36°
25
69°
37°
26
75°
41°
27
68°
38°
28
60°
34°
29
61°
34°
30
62°
37°
31
64°
38°
1
70°
43°
2
73°
44°
3
73°
45°
4
74°
45°
5
70°
38°
6
66°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Thermopolis West
Thermopolis West's May 2026 forecast shows daily high temperatures ranging from 39° to 75°, with overnight lows between 27° and 46°. The average high for May is 65° 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 Thermopolis West. See also: June | July | August.
