S
M
T
W
T
F
S
30
74°
49°
31
73°
48°
1
72°
49°
2
72°
50°
3
71°
49°
4
70°
49°
5
73°
48°
6
72°
49°
7
70°
47°
8
71°
45°
9
69°
48°
10
70°
49°
11
69°
46°
12
68°
45°
13
71°
45°
14
71°
51°
15
72°
51°
16
74°
50°
17
73°
44°
18
69°
43°
19
72°
48°
20
73°
45°
21
66°
43°
22
68°
46°
23
69°
47°
24
70°
48°
25
71°
46°
26
70°
40°
27
69°
41°
28
62°
40°
29
61°
39°
30
61°
38°
1
Hist. Avg.
63°
45°
2
Hist. Avg.
63°
45°
3
Hist. Avg.
62°
45°
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 61° to 74°, with overnight lows between 38° and 51°. The average high for September is 70° with an average low of 46°. 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.
