S
M
T
W
T
F
S
30
89°
66°
31
92°
71°
1
95°
71°
2
94°
74°
3
95°
72°
4
96°
72°
5
82°
68°
6
83°
60°
7
82°
59°
8
85°
63°
9
90°
70°
10
93°
70°
11
82°
65°
12
84°
66°
13
89°
69°
14
88°
67°
15
86°
65°
16
79°
59°
17
80°
60°
18
81°
59°
19
79°
57°
20
80°
61°
21
83°
63°
22
81°
62°
23
75°
62°
24
76°
61°
25
76°
60°
26
81°
61°
27
80°
60°
28
80°
60°
29
79°
59°
30
81°
60°
1
80°
60°
2
79°
59°
3
79°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lakeside
Lakeside's September 2026 forecast shows daily high temperatures ranging from 75° to 93°, with overnight lows between 57° and 70°. The average high for September is 82° with an average low of 62°. 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.
