S
M
T
W
T
F
S
30
86°
60°
31
86°
61°
1
84°
60°
2
83°
59°
3
84°
60°
4
84°
59°
5
83°
57°
6
83°
56°
7
82°
59°
8
82°
58°
9
77°
58°
10
78°
53°
11
78°
52°
12
77°
57°
13
77°
58°
14
78°
55°
15
77°
51°
16
75°
49°
17
74°
49°
18
74°
50°
19
75°
50°
20
76°
49°
21
74°
50°
22
75°
51°
23
76°
54°
24
77°
53°
25
80°
53°
26
79°
54°
27
79°
55°
28
80°
54°
29
80°
54°
30
79°
55°
1
80°
54°
2
79°
53°
3
79°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mount Laguna
Mount Laguna's September 2026 forecast shows daily high temperatures ranging from 74° to 86°, with overnight lows between 49° and 61°. The average high for September is 79° with an average low of 55°. 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 Laguna. See also: October | November | December.
