S
M
T
W
T
F
S
26
60°
40°
27
72°
40°
28
64°
41°
29
67°
49°
30
65°
49°
1
66°
44°
2
64°
42°
3
61°
44°
4
74°
56°
5
82°
61°
6
75°
53°
7
64°
41°
8
60°
40°
9
61°
42°
10
65°
45°
11
64°
46°
12
66°
47°
13
64°
48°
14
67°
51°
15
69°
52°
16
76°
55°
17
77°
56°
18
77°
56°
19
76°
55°
20
75°
56°
21
76°
56°
22
74°
49°
23
70°
48°
24
68°
49°
25
69°
49°
26
70°
52°
27
70°
50°
28
71°
51°
29
70°
50°
30
70°
51°
31
72°
59°
1
77°
59°
2
73°
54°
3
73°
58°
4
78°
60°
5
76°
57°
6
78°
59°
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 60° to 82°, with overnight lows between 40° and 61°. 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.
