S
M
T
W
T
F
S
30
78°
63°
31
85°
56°
1
83°
50°
2
83°
57°
3
86°
59°
4
79°
64°
5
76°
63°
6
84°
56°
7
80°
58°
8
73°
63°
9
75°
48°
10
76°
40°
11
83°
58°
12
70°
47°
13
N/A
14
63°
53°
15
68°
36°
16
69°
45°
17
72°
45°
18
69°
54°
19
72°
54°
20
73°
46°
21
69°
50°
22
72°
51°
23
73°
53°
24
72°
54°
25
74°
52°
26
67°
43°
27
72°
51°
28
63°
49°
29
67°
50°
30
68°
48°
1
70°
47°
2
67°
47°
3
67°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Hayward
Hayward's September 2026 forecast shows daily high temperatures ranging from 63° to 74°, with overnight lows between 36° and 54°. The average high for September is 69° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how September weather will actually feel in Hayward. See also: October | November | December.
