S
M
T
W
T
F
S
26
63°
52°
27
68°
49°
28
72°
50°
29
79°
52°
30
82°
54°
1
84°
55°
2
79°
57°
3
72°
54°
4
63°
55°
5
65°
53°
6
76°
53°
7
83°
58°
8
83°
55°
9
87°
57°
10
87°
59°
11
93°
61°
12
90°
60°
13
80°
55°
14
84°
55°
15
88°
54°
16
82°
53°
17
80°
52°
18
85°
55°
19
91°
59°
20
94°
60°
21
95°
58°
22
89°
56°
23
88°
55°
24
85°
54°
25
82°
53°
26
86°
55°
27
84°
56°
28
85°
53°
29
79°
49°
30
81°
51°
31
88°
55°
1
89°
56°
2
90°
58°
3
89°
57°
4
81°
51°
5
82°
54°
6
87°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Hayward
Hayward's May 2026 forecast shows daily high temperatures ranging from 79° to 95°, with overnight lows between 49° and 60°. The average high for May is 86° with an average low of 55°. 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 Hayward. See also: June | July | August.
