S
M
T
W
T
F
S
30
87°
57°
31
79°
55°
1
78°
56°
2
78°
61°
3
79°
56°
4
80°
63°
5
84°
62°
6
85°
55°
7
82°
55°
8
77°
54°
9
76°
53°
10
76°
60°
11
78°
53°
12
79°
53°
13
75°
52°
14
74°
59°
15
78°
58°
16
81°
50°
17
81°
49°
18
72°
48°
19
70°
50°
20
71°
50°
21
70°
51°
22
69°
49°
23
68°
53°
24
70°
54°
25
70°
53°
26
75°
55°
27
75°
48°
28
76°
46°
29
68°
46°
30
68°
52°
1
67°
53°
2
71°
51°
3
72°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mountain Lakes
Mountain Lakes's September 2026 forecast shows daily high temperatures ranging from 67° to 87°, with overnight lows between 46° and 63°. The average high for September is 75° 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 Mountain Lakes. See also: October | November | December.
