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
61°
59°
17
68°
62°
18
69°
59°
19
62°
58°
20
61°
57°
21
63°
57°
22
63°
58°
23
65°
58°
24
78°
60°
25
74°
56°
26
71°
57°
27
70°
55°
28
76°
54°
29
79°
56°
30
75°
57°
1
73°
58°
2
78°
59°
3
80°
60°
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 70° to 80°, with overnight lows between 54° and 60°. The average high for September is 75° with an average low of 57°. 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.
