S
M
T
W
T
F
S
30
91°
71°
31
87°
67°
1
86°
63°
2
84°
60°
3
82°
62°
4
84°
62°
5
92°
62°
6
76°
67°
7
92°
71°
8
97°
74°
9
106°
78°
10
98°
78°
11
91°
73°
12
88°
70°
13
87°
69°
14
86°
67°
15
82°
66°
16
80°
65°
17
80°
64°
18
80°
61°
19
84°
61°
20
82°
64°
21
80°
64°
22
83°
66°
23
95°
69°
24
92°
68°
25
89°
71°
26
92°
70°
27
93°
68°
28
90°
66°
29
98°
68°
30
97°
68°
1
94°
67°
2
86°
63°
3
87°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Duarte
Duarte's September 2026 forecast shows daily high temperatures ranging from 83° to 98°, with overnight lows between 63° and 71°. The average high for September is 91° with an average low of 67°. 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 Duarte. See also: October | November | December.
