S
M
T
W
T
F
S
26
50°
38°
27
45°
40°
28
52°
35°
29
50°
31°
30
48°
26°
1
54°
31°
2
66°
25°
3
69°
38°
4
62°
39°
5
43°
33°
6
43°
34°
7
57°
25°
8
68°
27°
9
58°
42°
10
54°
37°
11
65°
28°
12
62°
44°
13
70°
34°
14
77°
38°
15
82°
51°
16
70°
44°
17
64°
42°
18
61°
44°
19
50°
34°
20
62°
39°
21
66°
45°
22
60°
48°
23
61°
48°
24
76°
53°
25
78°
56°
26
77°
57°
27
76°
56°
28
76°
57°
29
80°
60°
30
78°
58°
31
76°
56°
1
81°
50°
2
68°
52°
3
71°
51°
4
72°
54°
5
76°
55°
6
73°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Riverton
Riverton's May 2026 forecast shows daily high temperatures ranging from 50° to 81°, with overnight lows between 34° and 60°. The average high for May is 71° with an average low of 52°. 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 Riverton. See also: June | July | August.
