S
M
T
W
T
F
S
30
71°
56°
31
72°
55°
1
71°
54°
2
65°
53°
3
66°
53°
4
67°
52°
5
67°
53°
6
70°
54°
7
71°
54°
8
69°
53°
9
69°
53°
10
70°
54°
11
70°
53°
12
69°
53°
13
69°
54°
14
68°
42°
15
64°
41°
16
59°
44°
17
62°
43°
18
61°
41°
19
58°
47°
20
59°
39°
21
59°
49°
22
62°
49°
23
67°
44°
24
66°
38°
25
58°
45°
26
58°
47°
27
64°
47°
28
64°
48°
29
63°
46°
30
63°
39°
1
60°
40°
2
58°
44°
3
61°
37°
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 58° to 72°, with overnight lows between 37° and 56°. The average high for September is 65° 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.
