S
M
T
W
T
F
S
30
98°
74°
31
99°
74°
1
99°
74°
2
102°
75°
3
101°
81°
4
96°
76°
5
96°
76°
6
96°
75°
7
99°
74°
8
97°
73°
9
94°
74°
10
97°
73°
11
100°
72°
12
97°
75°
13
96°
74°
14
93°
72°
15
93°
71°
16
90°
67°
17
92°
71°
18
85°
70°
19
91°
69°
20
92°
70°
21
91°
70°
22
91°
69°
23
90°
70°
24
90°
69°
25
89°
69°
26
90°
68°
27
83°
64°
28
83°
62°
29
84°
60°
30
86°
62°
1
88°
63°
2
89°
67°
3
84°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in New Braunfels
New Braunfels's September 2026 forecast shows daily high temperatures ranging from 83° to 100°, with overnight lows between 60° and 76°. The average high for September is 91° 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 New Braunfels. See also: October | November | December.
