S
M
T
W
T
F
S
30
90°
71°
31
90°
71°
1
94°
71°
2
96°
72°
3
96°
73°
4
93°
72°
5
94°
70°
6
92°
67°
7
89°
68°
8
89°
67°
9
90°
66°
10
89°
67°
11
90°
62°
12
86°
62°
13
84°
63°
14
85°
61°
15
84°
64°
16
79°
64°
17
80°
63°
18
83°
64°
19
84°
63°
20
78°
63°
21
80°
62°
22
81°
62°
23
82°
61°
24
84°
62°
25
85°
62°
26
83°
61°
27
79°
62°
28
82°
61°
29
80°
60°
30
83°
60°
1
81°
59°
2
80°
59°
3
80°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Weiss Dam
Weiss Dam's September 2026 forecast shows daily high temperatures ranging from 78° to 96°, with overnight lows between 58° and 73°. The average high for September is 85° with an average low of 64°. 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 Weiss Dam. See also: October | November | December.
