S
M
T
W
T
F
S
30
87°
74°
31
89°
73°
1
91°
73°
2
88°
74°
3
91°
73°
4
92°
72°
5
93°
75°
6
90°
74°
7
90°
72°
8
91°
74°
9
90°
74°
10
91°
73°
11
85°
73°
12
85°
72°
13
86°
72°
14
85°
71°
15
87°
70°
16
87°
69°
17
88°
73°
18
88°
73°
19
89°
72°
20
88°
73°
21
88°
73°
22
87°
72°
23
87°
73°
24
85°
72°
25
81°
72°
26
82°
71°
27
83°
72°
28
83°
72°
29
84°
71°
30
84°
70°
1
85°
69°
2
86°
70°
3
87°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Duval
Duval's September 2026 forecast shows daily high temperatures ranging from 81° to 93°, with overnight lows between 69° and 75°. The average high for September is 87° with an average low of 72°. 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 Duval. See also: October | November | December.
