S
M
T
W
T
F
S
30
72°
54°
31
76°
55°
1
68°
52°
2
73°
55°
3
76°
54°
4
75°
48°
5
70°
46°
6
70°
45°
7
69°
54°
8
74°
50°
9
74°
44°
10
66°
43°
11
64°
44°
12
63°
44°
13
65°
42°
14
64°
40°
15
61°
41°
16
61°
40°
17
62°
39°
18
60°
40°
19
61°
40°
20
61°
41°
21
65°
45°
22
68°
49°
23
66°
42°
24
69°
49°
25
65°
44°
26
64°
38°
27
58°
42°
28
58°
46°
29
57°
43°
30
58°
44°
1
59°
39°
2
58°
38°
3
56°
45°
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 56° to 76°, with overnight lows between 38° and 55°. The average high for September is 65° with an average low of 45°. 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.
