S
M
T
W
T
F
S
30
72°
56°
31
72°
60°
1
74°
61°
2
77°
61°
3
77°
58°
4
71°
59°
5
72°
57°
6
74°
53°
7
71°
54°
8
72°
56°
9
74°
57°
10
77°
58°
11
78°
59°
12
78°
58°
13
79°
58°
14
79°
55°
15
74°
55°
16
75°
58°
17
78°
59°
18
78°
59°
19
79°
57°
20
79°
58°
21
78°
59°
22
75°
55°
23
72°
52°
24
71°
51°
25
70°
50°
26
69°
52°
27
70°
55°
28
73°
53°
29
77°
50°
30
74°
57°
1
73°
57°
2
Hist. Avg.
74°
56°
3
Hist. Avg.
73°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in San Leandro
San Leandro's September 2026 forecast shows daily high temperatures ranging from 69° to 79°, with overnight lows between 50° and 61°. The average high for September is 75° with an average low of 56°. 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 San Leandro. See also: October | November | December.
