S
M
T
W
T
F
S
30
103°
78°
31
102°
77°
1
101°
79°
2
100°
80°
3
95°
78°
4
100°
79°
5
N/A
6
101°
77°
7
102°
79°
8
101°
78°
9
102°
77°
10
100°
75°
11
102°
77°
12
101°
78°
13
100°
76°
14
98°
76°
15
96°
75°
16
97°
72°
17
96°
73°
18
97°
73°
19
87°
66°
20
91°
71°
21
93°
72°
22
93°
72°
23
92°
70°
24
90°
70°
25
83°
69°
26
88°
69°
27
87°
68°
28
89°
69°
29
87°
69°
30
85°
60°
1
79°
57°
2
78°
56°
3
76°
56°
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 76° to 102°, with overnight lows between 56° and 79°. The average high for September is 93° with an average low of 71°. 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.
