S
M
T
W
T
F
S
30
68°
56°
31
70°
50°
1
70°
49°
2
67°
54°
3
67°
49°
4
72°
48°
5
68°
50°
6
67°
52°
7
70°
53°
8
71°
55°
9
72°
53°
10
70°
52°
11
68°
54°
12
70°
53°
13
70°
53°
14
69°
54°
15
70°
52°
16
70°
51°
17
67°
53°
18
68°
52°
19
69°
46°
20
65°
47°
21
64°
46°
22
65°
45°
23
66°
51°
24
66°
52°
25
67°
53°
26
68°
52°
27
68°
52°
28
67°
51°
29
64°
50°
30
61°
46°
1
61°
44°
2
60°
43°
3
61°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in The Down
The Down's September 2026 forecast shows daily high temperatures ranging from 60° to 72°, with overnight lows between 43° and 56°. The average high for September is 67° with an average low of 50°. 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 The Down. See also: October | November | December.