S
M
T
W
T
F
S
26
52°
32°
27
55°
34°
28
61°
34°
29
64°
36°
30
70°
34°
1
73°
34°
2
77°
41°
3
73°
37°
4
75°
41°
5
72°
50°
6
73°
45°
7
73°
43°
8
68°
43°
9
72°
41°
10
70°
41°
11
72°
43°
12
81°
39°
13
64°
46°
14
59°
45°
15
54°
39°
16
52°
36°
17
57°
37°
18
63°
34°
19
68°
45°
20
68°
45°
21
68°
36°
22
73°
45°
23
79°
41°
24
75°
45°
25
79°
41°
26
64°
52°
27
75°
54°
28
88°
52°
29
77°
52°
30
65°
48°
31
64°
50°
1
59°
47°
2
64°
46°
3
75°
51°
4
73°
49°
5
73°
48°
6
66°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Sunnyside
Sunnyside's May 2026 forecast shows daily high temperatures ranging from 59° to 75°, with overnight lows between 43° and 51°. The average high for May is 67° with an average low of 48°. 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 Sunnyside. See also: June | July | August.
