S
M
T
W
T
F
S
30
85°
63°
31
88°
60°
1
85°
60°
2
85°
62°
3
87°
64°
4
89°
66°
5
88°
65°
6
89°
65°
7
88°
64°
8
88°
63°
9
88°
63°
10
Hist. Avg.
84°
54°
11
Hist. Avg.
84°
54°
12
Hist. Avg.
84°
53°
13
Hist. Avg.
84°
53°
14
Hist. Avg.
84°
53°
15
Hist. Avg.
83°
52°
16
Hist. Avg.
83°
52°
17
Hist. Avg.
83°
52°
18
Hist. Avg.
83°
52°
19
Hist. Avg.
82°
51°
20
Hist. Avg.
82°
51°
21
Hist. Avg.
82°
51°
22
Hist. Avg.
82°
50°
23
Hist. Avg.
82°
50°
24
Hist. Avg.
81°
50°
25
Hist. Avg.
81°
49°
26
Hist. Avg.
81°
49°
27
Hist. Avg.
81°
49°
28
Hist. Avg.
80°
48°
29
Hist. Avg.
80°
48°
30
Hist. Avg.
80°
48°
1
Hist. Avg.
80°
48°
2
Hist. Avg.
80°
47°
3
Hist. Avg.
79°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Sundown
Sundown's September 2026 forecast shows daily high temperatures ranging from 85° to 89°, with overnight lows between 60° and 66°. The average high for September is 87° with an average low of 63°. 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 Sundown. See also: October | November | December.
