S
M
T
W
T
F
S
30
88°
80°
31
94°
79°
1
91°
75°
2
90°
79°
3
90°
80°
4
91°
78°
5
90°
79°
6
90°
78°
7
86°
79°
8
91°
78°
9
89°
78°
10
87°
78°
11
88°
79°
12
90°
79°
13
89°
77°
14
90°
76°
15
88°
76°
16
89°
77°
17
89°
76°
18
90°
74°
19
89°
75°
20
87°
74°
21
86°
74°
22
86°
73°
23
87°
75°
24
86°
75°
25
86°
74°
26
87°
75°
27
87°
74°
28
86°
74°
29
85°
73°
30
86°
74°
1
86°
74°
2
87°
73°
3
86°
75°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Juncos
Juncos's September 2026 forecast shows daily high temperatures ranging from 85° to 91°, with overnight lows between 73° and 79°. The average high for September is 88° 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 Juncos. See also: October | November | December.