S
M
T
W
T
F
S
30
86°
63°
31
90°
67°
1
89°
64°
2
89°
64°
3
88°
66°
4
90°
66°
5
89°
67°
6
88°
66°
7
88°
65°
8
82°
65°
9
81°
64°
10
82°
65°
11
87°
64°
12
86°
64°
13
87°
63°
14
86°
64°
15
86°
63°
16
84°
62°
17
80°
56°
18
79°
61°
19
84°
55°
20
78°
54°
21
76°
54°
22
75°
55°
23
77°
59°
24
82°
59°
25
83°
60°
26
83°
58°
27
82°
59°
28
81°
56°
29
80°
55°
30
80°
55°
1
78°
54°
2
81°
56°
3
74°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Day
Day's September 2026 forecast shows daily high temperatures ranging from 74° to 90°, with overnight lows between 49° and 67°. The average high for September is 83° with an average low of 60°. 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 Day. See also: October | November | December.
