S
M
T
W
T
F
S
31
84°
60°
1
68°
61°
2
66°
51°
3
72°
40°
4
61°
56°
5
64°
33°
6
72°
30°
7
72°
38°
8
74°
50°
9
81°
40°
10
77°
61°
11
77°
57°
12
79°
47°
13
80°
48°
14
65°
62°
15
73°
59°
16
67°
48°
17
68°
38°
18
71°
50°
19
69°
46°
20
79°
43°
21
82°
48°
22
69°
53°
23
72°
44°
24
64°
43°
25
64°
36°
26
63°
47°
27
65°
44°
28
63°
48°
29
72°
46°
30
73°
53°
1
59°
52°
2
56°
46°
3
68°
32°
4
58°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Horseshoe Bay
Horseshoe Bay's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Horseshoe Bay. See also: October | November | December.