S
M
T
W
T
F
S
30
80°
59°
31
82°
62°
1
83°
59°
2
79°
58°
3
78°
64°
4
83°
66°
5
85°
65°
6
85°
61°
7
78°
57°
8
78°
57°
9
80°
63°
10
77°
63°
11
80°
64°
12
77°
62°
13
80°
55°
14
75°
54°
15
74°
53°
16
74°
54°
17
75°
58°
18
78°
61°
19
80°
60°
20
81°
61°
21
76°
58°
22
80°
60°
23
78°
54°
24
81°
50°
25
72°
50°
26
71°
54°
27
79°
57°
28
79°
57°
29
Hist. Avg.
73°
52°
30
Hist. Avg.
73°
52°
1
Hist. Avg.
72°
51°
2
Hist. Avg.
72°
51°
3
Hist. Avg.
72°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lakeside
Lakeside's September 2026 forecast shows daily high temperatures ranging from 71° to 85°, with overnight lows between 50° and 66°. The average high for September is 79° with an average low of 59°. 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 Lakeside. See also: October | November | December.
