S
M
T
W
T
F
S
30
101°
76°
31
101°
77°
1
98°
85°
2
101°
77°
3
103°
78°
4
100°
77°
5
100°
75°
6
98°
74°
7
100°
76°
8
100°
75°
9
102°
73°
10
97°
74°
11
95°
70°
12
100°
73°
13
99°
71°
14
97°
70°
15
93°
67°
16
96°
71°
17
95°
72°
18
89°
71°
19
90°
71°
20
89°
70°
21
88°
70°
22
89°
69°
23
88°
70°
24
88°
70°
25
90°
69°
26
90°
67°
27
85°
62°
28
86°
61°
29
86°
61°
30
87°
63°
1
89°
65°
2
92°
67°
3
90°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Terlingua
Terlingua's September 2026 forecast shows daily high temperatures ranging from 85° to 103°, with overnight lows between 61° and 78°. The average high for September is 94° with an average low of 70°. 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 Terlingua. See also: October | November | December.