S
M
T
W
T
F
S
26
43°
28°
27
46°
26°
28
53°
30°
29
55°
22°
30
55°
29°
1
63°
25°
2
72°
29°
3
74°
30°
4
60°
38°
5
44°
30°
6
55°
18°
7
69°
45°
8
70°
39°
9
60°
38°
10
73°
35°
11
85°
37°
12
75°
36°
13
92°
35°
14
76°
47°
15
79°
40°
16
78°
31°
17
56°
37°
18
38°
31°
19
52°
26°
20
63°
25°
21
50°
32°
22
60°
33°
23
73°
35°
24
80°
43°
25
81°
49°
26
76°
44°
27
76°
48°
28
82°
49°
29
85°
45°
30
73°
51°
31
69°
38°
1
80°
45°
2
84°
48°
3
83°
45°
4
88°
50°
5
87°
53°
6
90°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Casper South
Casper South's May 2026 forecast shows daily high temperatures ranging from 69° to 90°, with overnight lows between 38° and 58°. The average high for May is 83° with an average low of 48°. 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 Casper South. See also: June | July | August.
