S
M
T
W
T
F
S
30
90°
77°
31
88°
76°
1
87°
75°
2
88°
75°
3
88°
76°
4
89°
77°
5
89°
76°
6
88°
76°
7
88°
75°
8
89°
76°
9
88°
76°
10
88°
76°
11
89°
78°
12
90°
76°
13
89°
78°
14
91°
75°
15
91°
77°
16
92°
76°
17
91°
77°
18
91°
76°
19
92°
76°
20
92°
77°
21
91°
77°
22
92°
76°
23
92°
77°
24
91°
77°
25
92°
76°
26
91°
77°
27
92°
76°
28
91°
76°
29
92°
75°
30
91°
76°
1
91°
76°
2
92°
75°
3
92°
76°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Yauco
Yauco's September 2026 forecast shows daily high temperatures ranging from 87° to 92°, with overnight lows between 75° and 78°. The average high for September is 90° with an average low of 76°. 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 Yauco. See also: October | November | December.