S
M
T
W
T
F
S
26
79°
59°
27
83°
53°
28
76°
57°
29
77°
62°
30
67°
53°
1
70°
50°
2
65°
51°
3
67°
43°
4
78°
45°
5
79°
52°
6
72°
58°
7
68°
49°
8
72°
54°
9
76°
57°
10
76°
58°
11
67°
42°
12
69°
50°
13
74°
55°
14
77°
57°
15
78°
56°
16
74°
54°
17
75°
55°
18
76°
54°
19
72°
53°
20
76°
57°
21
73°
56°
22
74°
57°
23
73°
58°
24
74°
58°
25
74°
57°
26
75°
56°
27
74°
53°
28
75°
52°
29
76°
58°
30
74°
59°
31
74°
59°
1
75°
58°
2
77°
60°
3
78°
60°
4
77°
61°
5
76°
61°
6
77°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Happy Valley
Happy Valley's May 2026 forecast shows daily high temperatures ranging from 67° to 78°, with overnight lows between 42° and 62°. The average high for May is 74° with an average low of 56°. 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 Happy Valley. See also: June | July | August.
