S
M
T
W
T
F
S
30
82°
59°
31
82°
55°
1
81°
52°
2
78°
56°
3
78°
58°
4
75°
57°
5
77°
57°
6
80°
58°
7
76°
53°
8
78°
52°
9
75°
51°
10
74°
50°
11
74°
52°
12
75°
49°
13
74°
48°
14
73°
49°
15
76°
46°
16
79°
51°
17
79°
50°
18
72°
50°
19
73°
49°
20
72°
48°
21
73°
47°
22
77°
48°
23
76°
49°
24
69°
47°
25
68°
44°
26
69°
47°
27
67°
44°
28
68°
46°
29
67°
41°
30
68°
43°
1
69°
45°
2
73°
44°
3
74°
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 67° to 80°, with overnight lows between 41° and 58°. The average high for September is 74° with an average low of 49°. 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.
