S
M
T
W
T
F
S
30
90°
77°
31
91°
78°
1
90°
77°
2
91°
76°
3
90°
76°
4
91°
77°
5
90°
77°
6
91°
77°
7
95°
76°
8
89°
78°
9
89°
79°
10
90°
78°
11
88°
75°
12
88°
75°
13
87°
76°
14
85°
76°
15
85°
75°
16
86°
75°
17
84°
74°
18
84°
75°
19
85°
75°
20
86°
74°
21
84°
75°
22
84°
75°
23
85°
74°
24
85°
75°
25
86°
75°
26
84°
74°
27
85°
75°
28
85°
75°
29
86°
74°
30
85°
75°
1
85°
75°
2
86°
74°
3
85°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Manatí
Manatí's September 2026 forecast shows daily high temperatures ranging from 84° to 95°, with overnight lows between 74° and 79°. The average high for September is 87° with an average low of 75°. 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 Manatí. See also: October | November | December.