S
M
T
W
T
F
S
30
92°
74°
31
93°
71°
1
89°
68°
2
88°
68°
3
88°
72°
4
92°
69°
5
93°
71°
6
92°
71°
7
91°
70°
8
92°
71°
9
91°
68°
10
88°
65°
11
88°
70°
12
91°
65°
13
86°
64°
14
84°
63°
15
85°
64°
16
84°
64°
17
88°
63°
18
90°
68°
19
85°
68°
20
89°
67°
21
88°
67°
22
Hist. Avg.
85°
60°
23
Hist. Avg.
85°
59°
24
Hist. Avg.
84°
58°
25
Hist. Avg.
84°
58°
26
Hist. Avg.
84°
58°
27
Hist. Avg.
83°
57°
28
Hist. Avg.
83°
57°
29
Hist. Avg.
83°
56°
30
Hist. Avg.
82°
56°
1
Hist. Avg.
82°
55°
2
Hist. Avg.
82°
55°
3
Hist. Avg.
81°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Lone Star
Lone Star's September 2026 forecast shows daily high temperatures ranging from 84° to 93°, with overnight lows between 63° and 74°. 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 Lone Star. See also: October | November | December.
