S
M
T
W
T
F
S
26
64°
29°
27
64°
32°
28
66°
35°
29
54°
39°
30
61°
43°
1
47°
37°
2
52°
34°
3
43°
38°
4
56°
32°
5
71°
38°
6
55°
46°
7
54°
39°
8
51°
37°
9
57°
33°
10
55°
42°
11
55°
35°
12
46°
28°
13
59°
31°
14
63°
44°
15
65°
45°
16
74°
56°
17
64°
35°
18
62°
50°
19
67°
60°
20
74°
39°
21
57°
30°
22
58°
37°
23
61°
41°
24
59°
39°
25
62°
41°
26
61°
43°
27
66°
43°
28
67°
41°
29
65°
43°
30
64°
44°
31
60°
46°
1
62°
46°
2
64°
45°
3
63°
43°
4
62°
42°
5
63°
45°
6
64°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Riley Brook
Riley Brook's May 2026 forecast shows daily high temperatures ranging from 57° to 74°, with overnight lows between 30° and 60°. The average high for May is 64° with an average low of 44°. 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 Brook. See also: June | July | August.