S
M
T
W
T
F
S
30
82°
59°
31
78°
58°
1
77°
62°
2
79°
61°
3
78°
58°
4
78°
58°
5
79°
63°
6
80°
64°
7
79°
59°
8
78°
57°
9
76°
62°
10
81°
56°
11
77°
55°
12
76°
55°
13
76°
56°
14
77°
61°
15
82°
61°
16
82°
62°
17
81°
61°
18
81°
56°
19
80°
51°
20
73°
52°
21
72°
57°
22
73°
58°
23
78°
59°
24
79°
60°
25
78°
52°
26
77°
48°
27
74°
50°
28
68°
49°
29
69°
49°
30
68°
48°
1
Hist. Avg.
72°
51°
2
Hist. Avg.
72°
51°
3
Hist. Avg.
72°
50°
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 68° to 82°, with overnight lows between 48° and 64°. The average high for September is 77° with an average low of 57°. 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.
