S
M
T
W
T
F
S
30
87°
60°
31
88°
52°
1
85°
55°
2
75°
61°
3
84°
60°
4
86°
53°
5
86°
50°
6
76°
56°
7
79°
59°
8
84°
56°
9
84°
53°
10
75°
54°
11
73°
53°
12
74°
47°
13
73°
47°
14
72°
51°
15
73°
54°
16
78°
55°
17
82°
56°
18
82°
53°
19
80°
51°
20
75°
52°
21
80°
53°
22
76°
45°
23
80°
43°
24
68°
42°
25
69°
45°
26
73°
43°
27
Hist. Avg.
74°
46°
28
Hist. Avg.
73°
46°
29
Hist. Avg.
73°
45°
30
Hist. Avg.
72°
45°
1
Hist. Avg.
72°
44°
2
Hist. Avg.
72°
44°
3
Hist. Avg.
71°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Pleasanton
Pleasanton's September 2026 forecast shows daily high temperatures ranging from 68° to 88°, with overnight lows between 42° and 61°. The average high for September is 78° with an average low of 52°. 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 Pleasanton. See also: October | November | December.
