S
M
T
W
T
F
S
30
66°
58°
31
64°
58°
1
69°
61°
2
69°
61°
3
71°
62°
4
69°
58°
5
69°
58°
6
69°
59°
7
83°
58°
8
84°
63°
9
84°
66°
10
79°
69°
11
67°
60°
12
67°
60°
13
69°
60°
14
74°
58°
15
66°
59°
16
70°
60°
17
74°
59°
18
75°
59°
19
75°
58°
20
69°
60°
21
72°
59°
22
78°
59°
23
78°
61°
24
77°
62°
25
75°
60°
26
75°
60°
27
74°
59°
28
75°
60°
29
74°
56°
30
72°
55°
1
77°
57°
2
70°
58°
3
77°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Alameda
Alameda's September 2026 forecast shows daily high temperatures ranging from 69° to 78°, with overnight lows between 55° and 62°. The average high for September is 74° with an average low of 59°. 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 Alameda. See also: October | November | December.
