S
M
T
W
T
F
S
30
80°
58°
31
80°
56°
1
79°
56°
2
79°
52°
3
76°
52°
4
73°
54°
5
70°
47°
6
70°
54°
7
69°
53°
8
74°
55°
9
77°
55°
10
68°
50°
11
67°
54°
12
69°
53°
13
68°
54°
14
75°
55°
15
77°
50°
16
67°
46°
17
66°
50°
18
69°
49°
19
Hist. Avg.
69°
48°
20
Hist. Avg.
68°
48°
21
Hist. Avg.
68°
48°
22
Hist. Avg.
68°
47°
23
Hist. Avg.
67°
47°
24
Hist. Avg.
67°
47°
25
Hist. Avg.
67°
47°
26
Hist. Avg.
66°
47°
27
Hist. Avg.
66°
47°
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 Little Mountain
Little Mountain's September 2026 forecast shows daily high temperatures ranging from 66° to 80°, with overnight lows between 46° and 58°. The average high for September is 73° with an average low of 53°. 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 Little Mountain. See also: October | November | December.