S
M
T
W
T
F
S
30
80°
51°
31
77°
51°
1
77°
50°
2
78°
49°
3
77°
55°
4
79°
59°
5
81°
51°
6
84°
48°
7
76°
48°
8
74°
49°
9
75°
51°
10
74°
50°
11
72°
44°
12
80°
45°
13
82°
52°
14
82°
49°
15
Hist. Avg.
77°
50°
16
Hist. Avg.
77°
50°
17
Hist. Avg.
76°
49°
18
Hist. Avg.
76°
49°
19
Hist. Avg.
75°
49°
20
Hist. Avg.
75°
48°
21
Hist. Avg.
74°
48°
22
Hist. Avg.
74°
47°
23
Hist. Avg.
73°
47°
24
Hist. Avg.
73°
46°
25
Hist. Avg.
72°
46°
26
Hist. Avg.
72°
46°
27
Hist. Avg.
71°
45°
28
Hist. Avg.
71°
45°
29
Hist. Avg.
70°
44°
30
Hist. Avg.
70°
44°
1
Hist. Avg.
69°
44°
2
Hist. Avg.
68°
43°
3
Hist. Avg.
68°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Timber Lake
Timber Lake's September 2026 forecast shows daily high temperatures ranging from 72° to 84°, with overnight lows between 44° and 59°. The average high for September is 78° 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 Timber Lake. See also: October | November | December.