S
M
T
W
T
F
S
30
79°
56°
31
78°
56°
1
77°
55°
2
68°
53°
3
69°
51°
4
73°
54°
5
78°
54°
6
66°
48°
7
65°
47°
8
68°
49°
9
71°
53°
10
76°
53°
11
75°
52°
12
74°
49°
13
63°
41°
14
72°
49°
15
73°
51°
16
71°
48°
17
72°
49°
18
74°
52°
19
75°
51°
20
73°
48°
21
72°
46°
22
72°
49°
23
73°
52°
24
74°
49°
25
72°
48°
26
70°
49°
27
70°
50°
28
73°
48°
29
61°
45°
30
61°
47°
1
64°
44°
2
57°
40°
3
54°
42°
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 54° to 79°, with overnight lows between 40° and 56°. The average high for September is 70° 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.
