S
M
T
W
T
F
S
30
89°
69°
31
88°
66°
1
87°
67°
2
88°
67°
3
86°
65°
4
88°
67°
5
88°
66°
6
89°
65°
7
86°
60°
8
Hist. Avg.
85°
63°
9
Hist. Avg.
85°
62°
10
Hist. Avg.
85°
62°
11
Hist. Avg.
84°
62°
12
Hist. Avg.
84°
61°
13
Hist. Avg.
84°
61°
14
Hist. Avg.
84°
61°
15
Hist. Avg.
83°
60°
16
Hist. Avg.
83°
60°
17
Hist. Avg.
83°
60°
18
Hist. Avg.
82°
59°
19
Hist. Avg.
82°
59°
20
Hist. Avg.
82°
58°
21
Hist. Avg.
81°
58°
22
Hist. Avg.
81°
58°
23
Hist. Avg.
81°
57°
24
Hist. Avg.
80°
57°
25
Hist. Avg.
80°
56°
26
Hist. Avg.
80°
56°
27
Hist. Avg.
79°
56°
28
Hist. Avg.
79°
55°
29
Hist. Avg.
79°
55°
30
Hist. Avg.
78°
54°
1
Hist. Avg.
78°
54°
2
Hist. Avg.
78°
54°
3
Hist. Avg.
77°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Plano
Plano's September 2026 forecast shows daily high temperatures ranging from 86° to 89°, with overnight lows between 60° and 69°. The average high for September is 88° with an average low of 66°. 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 Plano. See also: October | November | December.
