S
M
T
W
T
F
S
30
82°
58°
31
79°
55°
1
77°
55°
2
77°
57°
3
78°
58°
4
77°
56°
5
78°
56°
6
75°
63°
7
80°
59°
8
78°
56°
9
76°
57°
10
76°
54°
11
75°
54°
12
74°
55°
13
75°
56°
14
74°
55°
15
75°
59°
16
75°
56°
17
76°
53°
18
78°
53°
19
73°
58°
20
79°
57°
21
71°
50°
22
70°
48°
23
Hist. Avg.
76°
54°
24
Hist. Avg.
75°
54°
25
Hist. Avg.
75°
54°
26
Hist. Avg.
74°
53°
27
Hist. Avg.
74°
53°
28
Hist. Avg.
74°
52°
29
Hist. Avg.
73°
52°
30
Hist. Avg.
73°
52°
1
Hist. Avg.
72°
51°
2
Hist. Avg.
72°
51°
3
Hist. Avg.
71°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Downtown
Downtown's September 2026 forecast shows daily high temperatures ranging from 70° to 82°, with overnight lows between 48° and 63°. The average high for September is 76° with an average low of 56°. 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 Downtown. See also: October | November | December.
