S
M
T
W
T
F
S
30
81°
54°
31
77°
53°
1
75°
55°
2
74°
54°
3
76°
54°
4
75°
53°
5
73°
53°
6
73°
57°
7
74°
54°
8
74°
53°
9
75°
52°
10
73°
52°
11
72°
53°
12
71°
52°
13
73°
55°
14
72°
54°
15
75°
57°
16
77°
55°
17
78°
56°
18
78°
53°
19
70°
52°
20
77°
55°
21
68°
45°
22
68°
46°
23
Hist. Avg.
73°
54°
24
Hist. Avg.
72°
54°
25
Hist. Avg.
72°
53°
26
Hist. Avg.
72°
53°
27
Hist. Avg.
71°
52°
28
Hist. Avg.
71°
52°
29
Hist. Avg.
70°
52°
30
Hist. Avg.
70°
51°
1
Hist. Avg.
69°
51°
2
Hist. Avg.
69°
50°
3
Hist. Avg.
68°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Addison
Addison's September 2026 forecast shows daily high temperatures ranging from 68° to 81°, with overnight lows between 45° and 57°. The average high for September is 74° with an average low of 53°. 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 Addison. See also: October | November | December.
