S
M
T
W
T
F
S
30
90°
67°
31
91°
69°
1
92°
68°
2
92°
63°
3
89°
61°
4
88°
62°
5
88°
63°
6
90°
65°
7
94°
67°
8
92°
64°
9
89°
66°
10
92°
62°
11
89°
61°
12
89°
64°
13
90°
65°
14
91°
57°
15
88°
60°
16
87°
61°
17
86°
59°
18
83°
59°
19
81°
58°
20
81°
56°
21
83°
54°
22
82°
57°
23
86°
56°
24
83°
59°
25
87°
60°
26
87°
61°
27
86°
58°
28
86°
48°
29
78°
50°
30
78°
58°
1
84°
57°
2
85°
58°
3
86°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lake Powell
Lake Powell's September 2026 forecast shows daily high temperatures ranging from 78° to 94°, with overnight lows between 48° and 69°. The average high for September is 87° with an average low of 60°. 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 Lake Powell. See also: October | November | December.
