S
M
T
W
T
F
S
30
93°
76°
31
94°
75°
1
94°
76°
2
93°
75°
3
94°
73°
4
93°
74°
5
93°
75°
6
92°
75°
7
93°
73°
8
89°
73°
9
88°
72°
10
90°
72°
11
91°
74°
12
92°
74°
13
91°
73°
14
92°
74°
15
88°
73°
16
90°
72°
17
90°
72°
18
87°
73°
19
87°
68°
20
89°
66°
21
86°
66°
22
83°
67°
23
85°
67°
24
86°
69°
25
85°
70°
26
87°
70°
27
89°
69°
28
89°
71°
29
88°
71°
30
89°
70°
1
90°
69°
2
89°
64°
3
84°
65°
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 83° to 94°, with overnight lows between 64° and 76°. The average high for September is 90° 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.
