S
M
T
W
T
F
S
26
56°
25°
27
56°
19°
28
63°
26°
29
65°
34°
30
67°
29°
1
72°
26°
2
75°
38°
3
78°
32°
4
78°
38°
5
77°
45°
6
80°
34°
7
76°
33°
8
74°
30°
9
75°
27°
10
85°
31°
11
81°
42°
12
90°
41°
13
62°
35°
14
72°
25°
15
67°
31°
16
56°
32°
17
54°
33°
18
64°
28°
19
69°
34°
20
73°
34°
21
73°
32°
22
76°
29°
23
82°
37°
24
82°
41°
25
84°
42°
26
57°
41°
27
78°
41°
28
76°
37°
29
60°
35°
30
63°
34°
31
68°
36°
1
73°
38°
2
77°
47°
3
78°
42°
4
80°
46°
5
83°
47°
6
73°
42°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Riley
Riley's May 2026 forecast shows daily high temperatures ranging from 60° to 83°, with overnight lows between 34° and 47°. The average high for May is 73° with an average low of 41°. 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 Riley. See also: June | July | August.
