S
M
T
W
T
F
S
30
74°
64°
31
82°
61°
1
78°
55°
2
79°
57°
3
82°
63°
4
72°
63°
5
75°
62°
6
81°
63°
7
80°
66°
8
81°
62°
9
71°
52°
10
77°
47°
11
80°
62°
12
63°
51°
13
65°
40°
14
59°
53°
15
64°
43°
16
65°
47°
17
67°
51°
18
67°
56°
19
69°
50°
20
70°
49°
21
67°
48°
22
70°
50°
23
67°
55°
24
70°
52°
25
71°
53°
26
65°
44°
27
70°
52°
28
60°
50°
29
66°
49°
30
66°
48°
1
67°
48°
2
65°
47°
3
66°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Crosslake
Crosslake's September 2026 forecast shows daily high temperatures ranging from 59° to 71°, with overnight lows between 40° and 56°. The average high for September is 66° with an average low of 49°. 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 Crosslake. See also: October | November | December.