S
M
T
W
T
F
S
30
97°
75°
31
96°
72°
1
96°
71°
2
95°
70°
3
96°
70°
4
96°
75°
5
97°
73°
6
96°
72°
7
95°
73°
8
94°
72°
9
95°
73°
10
95°
72°
11
94°
69°
12
89°
68°
13
91°
70°
14
91°
69°
15
92°
70°
16
87°
70°
17
89°
69°
18
91°
61°
19
88°
62°
20
83°
62°
21
84°
65°
22
85°
68°
23
88°
68°
24
89°
67°
25
90°
69°
26
91°
68°
27
89°
67°
28
90°
63°
29
89°
64°
30
89°
65°
1
88°
66°
2
Hist. Avg.
83°
62°
3
Hist. Avg.
83°
62°
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 83° to 97°, with overnight lows between 61° and 75°. The average high for September is 91° with an average low of 69°. 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.
