S
M
T
W
T
F
S
30
91°
61°
31
92°
60°
1
91°
59°
2
90°
59°
3
90°
60°
4
92°
62°
5
92°
63°
6
91°
60°
7
90°
59°
8
87°
60°
9
89°
59°
10
88°
56°
11
85°
56°
12
85°
55°
13
86°
55°
14
84°
54°
15
84°
60°
16
83°
57°
17
89°
56°
18
87°
54°
19
84°
56°
20
87°
56°
21
88°
57°
22
88°
58°
23
86°
60°
24
89°
61°
25
90°
60°
26
Hist. Avg.
84°
58°
27
Hist. Avg.
84°
58°
28
Hist. Avg.
84°
57°
29
Hist. Avg.
84°
57°
30
Hist. Avg.
83°
57°
1
Hist. Avg.
83°
57°
2
Hist. Avg.
83°
57°
3
Hist. Avg.
82°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Discovery Bay
Discovery Bay's September 2026 forecast shows daily high temperatures ranging from 83° to 92°, with overnight lows between 54° and 63°. The average high for September is 88° with an average low of 58°. 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 Discovery Bay. See also: October | November | December.
