S
M
T
W
T
F
S
30
89°
73°
31
90°
72°
1
91°
73°
2
90°
72°
3
91°
73°
4
91°
73°
5
92°
74°
6
92°
73°
7
91°
73°
8
91°
72°
9
90°
73°
10
91°
73°
11
90°
72°
12
91°
73°
13
90°
72°
14
91°
72°
15
90°
74°
16
91°
73°
17
90°
72°
18
91°
72°
19
91°
73°
20
89°
72°
21
89°
74°
22
Hist. Avg.
90°
69°
23
Hist. Avg.
90°
69°
24
Hist. Avg.
90°
69°
25
Hist. Avg.
90°
69°
26
Hist. Avg.
90°
69°
27
Hist. Avg.
90°
69°
28
Hist. Avg.
90°
69°
29
Hist. Avg.
90°
69°
30
Hist. Avg.
90°
69°
1
Hist. Avg.
90°
69°
2
Hist. Avg.
90°
69°
3
Hist. Avg.
90°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Mayagüez
Mayagüez's September 2026 forecast shows daily high temperatures ranging from 89° to 92°, with overnight lows between 72° and 74°. The average high for September is 91° 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 Mayagüez. See also: October | November | December.
