S
M
T
W
T
F
S
29
77°
32°
30
77°
37°
31
57°
31°
1
59°
33°
2
64°
33°
3
40°
32°
4
55°
28°
5
65°
28°
6
60°
35°
7
76°
33°
8
59°
34°
9
63°
30°
10
73°
26°
11
78°
39°
12
74°
37°
13
58°
33°
14
63°
28°
15
67°
33°
16
56°
34°
17
47°
20°
18
58°
21°
19
70°
20°
20
81°
34°
21
84°
33°
22
76°
44°
23
53°
32°
24
41°
30°
25
50°
30°
26
45°
24°
27
46°
29°
28
54°
28°
29
59°
30°
30
60°
27°
1
68°
26°
2
75°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Thermopolis
Thermopolis's April 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for April is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Thermopolis. See also: May | June | July.
