S
M
T
W
T
F
S
26
52°
32°
27
59°
34°
28
61°
38°
29
63°
37°
30
74°
44°
1
77°
47°
2
78°
49°
3
78°
47°
4
75°
44°
5
74°
47°
6
74°
47°
7
75°
48°
8
74°
49°
9
69°
47°
10
72°
44°
11
65°
40°
12
66°
40°
13
71°
41°
14
77°
45°
15
78°
50°
16
79°
51°
17
72°
42°
18
75°
46°
19
78°
49°
20
79°
51°
21
76°
51°
22
68°
46°
23
69°
43°
24
75°
46°
25
80°
51°
26
82°
53°
27
81°
53°
28
72°
44°
29
80°
51°
30
81°
52°
31
75°
49°
1
73°
47°
2
77°
52°
3
82°
55°
4
80°
55°
5
77°
53°
6
79°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Riggins
Riggins's May 2026 forecast shows daily high temperatures ranging from 59° to 82°, with overnight lows between 34° and 55°. The average high for May is 74° with an average low of 47°. 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 Riggins. See also: June | July | August.