S
M
T
W
T
F
S
30
83°
69°
31
87°
71°
1
95°
77°
2
95°
76°
3
94°
75°
4
95°
72°
5
83°
68°
6
85°
67°
7
80°
64°
8
86°
66°
9
86°
62°
10
80°
60°
11
76°
56°
12
76°
57°
13
74°
55°
14
76°
56°
15
75°
53°
16
79°
59°
17
78°
58°
18
71°
57°
19
75°
58°
20
76°
58°
21
75°
57°
22
74°
56°
23
71°
55°
24
73°
53°
25
76°
55°
26
76°
50°
27
65°
46°
28
63°
44°
29
64°
46°
30
64°
44°
1
63°
46°
2
66°
52°
3
65°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Addison
Addison's September 2026 forecast shows daily high temperatures ranging from 63° to 95°, with overnight lows between 44° and 76°. The average high for September is 76° with an average low of 57°. 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.
