S
M
T
W
T
F
S
30
90°
68°
31
91°
69°
1
87°
63°
2
83°
61°
3
82°
61°
4
87°
65°
5
86°
66°
6
78°
61°
7
80°
66°
8
83°
65°
9
84°
65°
10
85°
64°
11
83°
61°
12
85°
65°
13
81°
65°
14
83°
64°
15
84°
64°
16
84°
63°
17
83°
64°
18
84°
62°
19
79°
56°
20
78°
59°
21
83°
62°
22
82°
61°
23
83°
59°
24
75°
53°
25
75°
60°
26
73°
57°
27
74°
60°
28
77°
59°
29
80°
59°
30
71°
58°
1
73°
51°
2
70°
48°
3
70°
55°
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 70° to 91°, with overnight lows between 48° and 69°. The average high for September is 81° with an average low of 61°. 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.
