S
M
T
W
T
F
S
30
77°
58°
31
76°
57°
1
77°
58°
2
78°
59°
3
80°
59°
4
80°
60°
5
79°
60°
6
81°
59°
7
81°
61°
8
80°
60°
9
80°
59°
10
75°
60°
11
75°
60°
12
79°
61°
13
80°
62°
14
81°
61°
15
80°
60°
16
79°
59°
17
78°
60°
18
79°
60°
19
80°
61°
20
81°
59°
21
Hist. Avg.
77°
57°
22
Hist. Avg.
77°
57°
23
Hist. Avg.
77°
57°
24
Hist. Avg.
76°
57°
25
Hist. Avg.
76°
57°
26
Hist. Avg.
76°
57°
27
Hist. Avg.
76°
57°
28
Hist. Avg.
76°
56°
29
Hist. Avg.
76°
56°
30
Hist. Avg.
76°
56°
1
Hist. Avg.
76°
56°
2
Hist. Avg.
76°
56°
3
Hist. Avg.
76°
56°
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 75° to 81°, with overnight lows between 57° and 62°. The average high for September is 79° with an average low of 60°. 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.
