S
M
T
W
T
F
S
30
76°
48°
31
76°
52°
1
78°
49°
2
76°
50°
3
75°
49°
4
76°
46°
5
75°
48°
6
78°
47°
7
79°
48°
8
80°
51°
9
80°
47°
10
77°
45°
11
77°
44°
12
78°
47°
13
79°
47°
14
79°
49°
15
78°
50°
16
80°
51°
17
79°
49°
18
78°
46°
19
78°
45°
20
72°
46°
21
78°
49°
22
77°
47°
23
71°
44°
24
72°
42°
25
74°
41°
26
75°
42°
27
Hist. Avg.
75°
48°
28
Hist. Avg.
75°
48°
29
Hist. Avg.
74°
47°
30
Hist. Avg.
74°
47°
1
Hist. Avg.
74°
46°
2
Hist. Avg.
73°
46°
3
Hist. Avg.
73°
45°
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 71° to 80°, with overnight lows between 41° and 52°. The average high for September is 77° with an average low of 47°. 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.
