S
M
T
W
T
F
S
30
87°
73°
31
93°
72°
1
96°
71°
2
97°
72°
3
96°
73°
4
96°
73°
5
98°
72°
6
95°
69°
7
71°
71°
8
89°
73°
9
90°
69°
10
92°
72°
11
91°
73°
12
90°
72°
13
93°
74°
14
95°
71°
15
88°
72°
16
88°
67°
17
90°
62°
18
90°
65°
19
94°
71°
20
91°
71°
21
93°
69°
22
89°
70°
23
81°
64°
24
71°
56°
25
80°
51°
26
80°
49°
27
81°
54°
28
82°
57°
29
83°
59°
30
84°
61°
1
83°
62°
2
78°
59°
3
81°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Lone Star
Lone Star's September 2026 forecast shows daily high temperatures ranging from 71° to 89°, with overnight lows between 49° and 70°. The average high for September is 81° with an average low of 59°. 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 Lone Star. See also: October | November | December.
