S
M
T
W
T
F
S
26
85°
56°
27
90°
56°
28
85°
66°
29
89°
63°
30
N/A
1
63°
52°
2
70°
43°
3
73°
44°
4
78°
49°
5
80°
61°
6
79°
58°
7
74°
49°
8
75°
50°
9
74°
55°
10
77°
58°
11
80°
60°
12
81°
60°
13
82°
59°
14
83°
60°
15
85°
64°
16
85°
64°
17
84°
63°
18
86°
64°
19
85°
64°
20
86°
65°
21
86°
65°
22
85°
64°
23
83°
65°
24
81°
65°
25
85°
66°
26
85°
66°
27
83°
65°
28
82°
66°
29
84°
66°
30
86°
65°
31
86°
66°
1
87°
67°
2
88°
67°
3
88°
68°
4
89°
68°
5
84°
66°
6
83°
66°
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 63° to 89°, with overnight lows between 43° and 68°. The average high for May is 82° with an average low of 61°. 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.
