S
M
T
W
T
F
S
30
60°
49°
31
76°
45°
1
84°
41°
2
75°
47°
3
65°
46°
4
63°
48°
5
72°
48°
6
69°
51°
7
54°
51°
8
58°
46°
9
72°
45°
10
73°
43°
11
66°
49°
12
68°
51°
13
59°
41°
14
54°
42°
15
59°
48°
16
70°
42°
17
73°
50°
18
74°
50°
19
70°
48°
20
73°
46°
21
75°
49°
22
73°
51°
23
66°
49°
24
70°
51°
25
72°
50°
26
68°
50°
27
63°
47°
28
66°
49°
29
64°
46°
30
63°
42°
1
55°
40°
2
64°
47°
3
63°
43°
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 55° to 75°, with overnight lows between 40° and 51°. The average high for September is 68° with an average low of 48°. 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.
