S
M
T
W
T
F
S
30
77°
61°
31
79°
60°
1
81°
59°
2
80°
52°
3
73°
57°
4
73°
60°
5
74°
57°
6
81°
51°
7
74°
49°
8
70°
49°
9
72°
56°
10
71°
58°
11
73°
57°
12
78°
55°
13
79°
48°
14
70°
48°
15
67°
46°
16
67°
50°
17
68°
47°
18
68°
45°
19
72°
42°
20
66°
45°
21
66°
53°
22
69°
45°
23
75°
52°
24
74°
53°
25
74°
53°
26
73°
52°
27
74°
50°
28
73°
43°
29
70°
47°
30
61°
48°
1
68°
47°
2
70°
50°
3
62°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Hayward
Hayward's September 2026 forecast shows daily high temperatures ranging from 61° to 81°, with overnight lows between 38° and 61°. The average high for September is 72° with an average low of 51°. 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.
