S
M
T
W
T
F
S
30
80°
58°
31
79°
57°
1
78°
53°
2
78°
50°
3
77°
49°
4
78°
49°
5
77°
48°
6
68°
46°
7
67°
49°
8
67°
55°
9
66°
53°
10
66°
50°
11
67°
45°
12
65°
49°
13
65°
53°
14
66°
49°
15
65°
46°
16
64°
45°
17
66°
47°
18
70°
50°
19
74°
47°
20
73°
47°
21
70°
43°
22
63°
42°
23
63°
45°
24
64°
44°
25
62°
42°
26
62°
43°
27
63°
46°
28
62°
45°
29
61°
45°
30
61°
43°
1
62°
46°
2
65°
50°
3
69°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lake Cassidy
Lake Cassidy's September 2026 forecast shows daily high temperatures ranging from 61° to 80°, with overnight lows between 42° and 58°. The average high for September is 68° with an average low of 48°. 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 Cassidy. See also: October | November | December.
