S
M
T
W
T
F
S
30
76°
53°
31
74°
51°
1
74°
52°
2
76°
55°
3
75°
51°
4
75°
50°
5
76°
50°
6
75°
52°
7
73°
48°
8
74°
48°
9
71°
54°
10
73°
47°
11
72°
47°
12
72°
48°
13
73°
51°
14
75°
52°
15
78°
52°
16
78°
51°
17
77°
52°
18
78°
52°
19
77°
44°
20
73°
43°
21
68°
47°
22
69°
50°
23
73°
50°
24
74°
51°
25
75°
44°
26
74°
40°
27
71°
42°
28
66°
41°
29
66°
41°
30
65°
40°
1
Hist. Avg.
69°
42°
2
Hist. Avg.
68°
42°
3
Hist. Avg.
68°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mount Liberty
Mount Liberty's September 2026 forecast shows daily high temperatures ranging from 65° to 78°, with overnight lows between 40° and 55°. The average high for September is 73° 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 Mount Liberty. See also: October | November | December.