S
M
T
W
T
F
S
30
89°
72°
31
91°
73°
1
89°
75°
2
88°
70°
3
88°
69°
4
87°
70°
5
86°
70°
6
87°
72°
7
90°
74°
8
89°
74°
9
89°
73°
10
88°
72°
11
89°
72°
12
87°
73°
13
88°
72°
14
91°
67°
15
86°
67°
16
87°
68°
17
85°
67°
18
86°
68°
19
86°
70°
20
89°
70°
21
85°
69°
22
84°
70°
23
85°
70°
24
84°
69°
25
84°
68°
26
85°
69°
27
84°
69°
28
84°
68°
29
85°
68°
30
85°
67°
1
87°
68°
2
87°
68°
3
86°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Baytown
Baytown's September 2026 forecast shows daily high temperatures ranging from 84° to 91°, with overnight lows between 63° and 75°. The average high for September is 87° with an average low of 70°. 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 Baytown. See also: October | November | December.
