S
M
T
W
T
F
S
26
44°
31°
27
44°
34°
28
44°
35°
29
46°
34°
30
47°
33°
1
48°
35°
2
46°
32°
3
44°
31°
4
45°
38°
5
46°
38°
6
46°
37°
7
48°
38°
8
47°
39°
9
49°
39°
10
48°
38°
11
50°
40°
12
47°
39°
13
48°
36°
14
54°
40°
15
54°
40°
16
49°
39°
17
50°
40°
18
50°
40°
19
55°
41°
20
55°
41°
21
56°
42°
22
56°
42°
23
57°
43°
24
56°
42°
25
51°
42°
26
54°
40°
27
53°
43°
28
56°
43°
29
55°
40°
30
57°
42°
31
57°
42°
1
54°
43°
2
56°
44°
3
58°
43°
4
59°
44°
5
58°
42°
6
56°
42°
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 44° to 59°, with overnight lows between 31° and 44°. The average high for May is 51° with an average low of 39°. 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.
