S
M
T
W
T
F
S
30
86°
68°
31
92°
68°
1
96°
72°
2
97°
73°
3
96°
72°
4
96°
71°
5
94°
67°
6
83°
63°
7
80°
65°
8
85°
66°
9
92°
70°
10
93°
68°
11
90°
65°
12
86°
66°
13
87°
66°
14
87°
65°
15
88°
65°
16
87°
62°
17
78°
65°
18
76°
65°
19
77°
65°
20
78°
64°
21
77°
64°
22
80°
65°
23
82°
64°
24
76°
64°
25
76°
63°
26
80°
64°
27
81°
61°
28
80°
55°
29
73°
53°
30
73°
53°
1
74°
55°
2
74°
59°
3
73°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Trinity
Trinity's September 2026 forecast shows daily high temperatures ranging from 73° to 96°, with overnight lows between 53° and 72°. The average high for September is 82° with an average low of 64°. 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 Trinity. See also: October | November | December.
