S
M
T
W
T
F
S
30
82°
65°
31
85°
67°
1
87°
63°
2
82°
60°
3
80°
60°
4
81°
59°
5
80°
59°
6
81°
61°
7
84°
60°
8
84°
64°
9
85°
64°
10
85°
63°
11
84°
63°
12
85°
64°
13
85°
64°
14
84°
63°
15
85°
64°
16
85°
64°
17
82°
62°
18
82°
62°
19
81°
61°
20
81°
61°
21
82°
60°
22
81°
53°
23
77°
56°
24
75°
59°
25
Hist. Avg.
76°
56°
26
Hist. Avg.
76°
56°
27
Hist. Avg.
76°
55°
28
Hist. Avg.
75°
55°
29
Hist. Avg.
75°
54°
30
Hist. Avg.
74°
54°
1
Hist. Avg.
74°
54°
2
Hist. Avg.
74°
53°
3
Hist. Avg.
73°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lakeside
Lakeside's September 2026 forecast shows daily high temperatures ranging from 75° to 87°, with overnight lows between 53° and 67°. The average high for September is 83° with an average low of 62°. 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.
