S
M
T
W
T
F
S
30
N/A
31
89°
75°
1
90°
76°
2
92°
75°
3
91°
75°
4
90°
75°
5
91°
76°
6
94°
75°
7
92°
75°
8
91°
74°
9
88°
74°
10
88°
73°
11
89°
74°
12
88°
74°
13
88°
74°
14
88°
74°
15
87°
73°
16
87°
74°
17
88°
73°
18
87°
74°
19
88°
74°
20
89°
74°
21
87°
73°
22
87°
74°
23
88°
74°
24
87°
74°
25
88°
74°
26
87°
74°
27
88°
74°
28
88°
73°
29
89°
75°
30
88°
75°
1
89°
74°
2
88°
75°
3
88°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Mayagüez
Mayagüez's September 2026 forecast shows daily high temperatures ranging from 87° to 94°, with overnight lows between 73° and 76°. The average high for September is 89° with an average low of 74°. 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 Mayagüez. See also: October | November | December.
