S
M
T
W
T
F
S
30
93°
70°
31
94°
68°
1
94°
67°
2
91°
71°
3
93°
70°
4
90°
67°
5
90°
70°
6
89°
71°
7
88°
69°
8
96°
69°
9
96°
67°
10
96°
67°
11
98°
70°
12
98°
67°
13
95°
69°
14
94°
68°
15
85°
61°
16
83°
59°
17
80°
56°
18
80°
58°
19
81°
56°
20
80°
55°
21
84°
60°
22
79°
60°
23
80°
59°
24
79°
59°
25
79°
60°
26
80°
61°
27
77°
61°
28
78°
59°
29
77°
55°
30
79°
51°
1
74°
50°
2
75°
50°
3
74°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Van Horn
Van Horn's September 2026 forecast shows daily high temperatures ranging from 74° to 98°, with overnight lows between 50° and 70°. The average high for September is 84° with an average low of 60°. 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 Van Horn. See also: October | November | December.