S
M
T
W
T
F
S
30
73°
51°
31
79°
48°
1
77°
47°
2
72°
50°
3
71°
55°
4
75°
52°
5
79°
51°
6
78°
54°
7
70°
48°
8
68°
47°
9
69°
46°
10
70°
49°
11
76°
52°
12
74°
54°
13
68°
55°
14
67°
56°
15
66°
53°
16
66°
53°
17
67°
51°
18
66°
51°
19
65°
48°
20
67°
45°
21
66°
44°
22
65°
45°
23
65°
45°
24
68°
49°
25
72°
52°
26
69°
46°
27
68°
44°
28
Hist. Avg.
66°
46°
29
Hist. Avg.
65°
46°
30
Hist. Avg.
65°
46°
1
Hist. Avg.
65°
46°
2
Hist. Avg.
64°
46°
3
Hist. Avg.
64°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Cultus Lake
Cultus Lake's September 2026 forecast shows daily high temperatures ranging from 65° to 79°, with overnight lows between 44° and 56°. The average high for September is 70° with an average low of 50°. 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 Cultus Lake. See also: October | November | December.
