S
M
T
W
T
F
S
30
95°
71°
31
97°
73°
1
96°
76°
2
97°
73°
3
97°
75°
4
95°
73°
5
97°
73°
6
99°
75°
7
99°
75°
8
95°
75°
9
95°
73°
10
95°
72°
11
91°
75°
12
95°
75°
13
95°
75°
14
97°
75°
15
99°
75°
16
99°
75°
17
97°
72°
18
95°
66°
19
95°
68°
20
97°
72°
21
97°
73°
22
95°
73°
23
91°
70°
24
84°
63°
25
90°
61°
26
90°
63°
27
91°
61°
28
91°
64°
29
93°
61°
30
95°
68°
1
93°
72°
2
95°
75°
3
90°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Delta
Delta's September 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Delta. See also: October | November | December.