S
M
T
W
T
F
S
30
103°
76°
31
104°
78°
1
103°
77°
2
105°
77°
3
106°
79°
4
102°
78°
5
99°
77°
6
97°
76°
7
101°
76°
8
100°
78°
9
98°
78°
10
99°
78°
11
102°
79°
12
101°
78°
13
101°
76°
14
100°
75°
15
100°
75°
16
99°
76°
17
102°
74°
18
93°
74°
19
96°
74°
20
96°
73°
21
95°
74°
22
95°
74°
23
94°
73°
24
93°
73°
25
94°
72°
26
94°
72°
27
87°
70°
28
87°
65°
29
88°
64°
30
91°
65°
1
92°
66°
2
93°
68°
3
92°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cotulla
Cotulla's September 2026 forecast shows daily high temperatures ranging from 87° to 102°, with overnight lows between 64° and 79°. The average high for September is 96° with an average low of 73°. 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 Cotulla. See also: October | November | December.
