S
M
T
W
T
F
S
30
90°
77°
31
89°
79°
1
90°
79°
2
89°
79°
3
86°
79°
4
91°
77°
5
90°
76°
6
96°
73°
7
86°
74°
8
87°
75°
9
88°
74°
10
90°
74°
11
92°
75°
12
91°
76°
13
90°
76°
14
89°
75°
15
91°
76°
16
89°
75°
17
89°
76°
18
88°
74°
19
87°
73°
20
86°
75°
21
85°
75°
22
89°
75°
23
89°
74°
24
88°
75°
25
85°
75°
26
87°
74°
27
87°
75°
28
86°
75°
29
87°
74°
30
87°
74°
1
86°
73°
2
85°
74°
3
87°
74°
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 85° to 96°, with overnight lows between 73° and 76°. The average high for September is 88° with an average low of 75°. 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.
