S
M
T
W
T
F
S
30
90°
73°
31
91°
75°
1
90°
74°
2
89°
70°
3
89°
70°
4
88°
71°
5
87°
71°
6
88°
74°
7
90°
74°
8
90°
73°
9
89°
74°
10
89°
73°
11
91°
73°
12
89°
72°
13
89°
73°
14
91°
68°
15
88°
69°
16
87°
68°
17
86°
69°
18
87°
70°
19
87°
70°
20
90°
71°
21
86°
72°
22
85°
71°
23
86°
71°
24
86°
70°
25
87°
70°
26
86°
69°
27
86°
70°
28
85°
70°
29
86°
69°
30
86°
69°
1
88°
68°
2
87°
69°
3
87°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lake Jackson
Lake Jackson's September 2026 forecast shows daily high temperatures ranging from 85° to 91°, with overnight lows between 63° and 75°. The average high for September is 88° 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 Lake Jackson. See also: October | November | December.
