S
M
T
W
T
F
S
26
60°
40°
27
72°
40°
28
64°
41°
29
67°
49°
30
65°
49°
1
65°
49°
2
60°
43°
3
60°
44°
4
71°
52°
5
82°
59°
6
69°
51°
7
62°
41°
8
60°
41°
9
63°
48°
10
67°
48°
11
66°
49°
12
66°
51°
13
68°
48°
14
67°
50°
15
67°
52°
16
68°
51°
17
68°
51°
18
69°
56°
19
76°
56°
20
75°
55°
21
71°
56°
22
77°
54°
23
72°
55°
24
77°
55°
25
71°
50°
26
70°
54°
27
70°
58°
28
74°
59°
29
78°
59°
30
77°
58°
31
77°
57°
1
74°
53°
2
70°
53°
3
70°
52°
4
72°
52°
5
72°
53°
6
73°
53°
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 41° and 59°. The average high for May is 70° 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.
