S
M
T
W
T
F
S
30
96°
72°
31
96°
75°
1
96°
74°
2
97°
74°
3
100°
77°
4
87°
74°
5
93°
74°
6
94°
74°
7
96°
75°
8
94°
72°
9
93°
73°
10
96°
74°
11
95°
72°
12
94°
73°
13
93°
72°
14
92°
71°
15
92°
72°
16
93°
71°
17
87°
68°
18
83°
68°
19
88°
69°
20
90°
68°
21
90°
68°
22
89°
67°
23
89°
68°
24
88°
67°
25
88°
67°
26
87°
66°
27
80°
59°
28
80°
59°
29
81°
58°
30
84°
60°
1
87°
62°
2
87°
64°
3
81°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Bertram
Bertram's September 2026 forecast shows daily high temperatures ranging from 80° to 96°, with overnight lows between 55° and 75°. The average high for September is 89° with an average low of 68°. 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 Bertram. See also: October | November | December.