S
M
T
W
T
F
S
30
88°
80°
31
96°
79°
1
89°
78°
2
90°
78°
3
88°
78°
4
90°
79°
5
90°
79°
6
92°
79°
7
91°
78°
8
89°
77°
9
90°
77°
10
90°
79°
11
89°
78°
12
88°
79°
13
89°
78°
14
87°
77°
15
88°
76°
16
86°
77°
17
87°
77°
18
87°
76°
19
88°
77°
20
88°
77°
21
86°
76°
22
86°
77°
23
87°
77°
24
87°
76°
25
88°
77°
26
86°
76°
27
87°
77°
28
87°
77°
29
88°
76°
30
87°
77°
1
87°
77°
2
88°
76°
3
87°
76°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Coqui II
Coqui II's September 2026 forecast shows daily high temperatures ranging from 86° to 92°, with overnight lows between 76° and 79°. The average high for September is 88° with an average low of 77°. 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 Coqui II. See also: October | November | December.