S
M
T
W
T
F
S
30
94°
71°
31
93°
70°
1
94°
74°
2
95°
71°
3
93°
72°
4
87°
71°
5
91°
72°
6
92°
72°
7
93°
73°
8
93°
72°
9
92°
73°
10
92°
72°
11
91°
72°
12
91°
70°
13
90°
67°
14
85°
65°
15
83°
65°
16
85°
66°
17
89°
69°
18
89°
68°
19
82°
67°
20
84°
68°
21
90°
69°
22
89°
70°
23
88°
62°
24
89°
61°
25
80°
60°
26
83°
59°
27
87°
67°
28
87°
67°
29
88°
67°
30
Hist. Avg.
84°
63°
1
Hist. Avg.
84°
63°
2
Hist. Avg.
83°
63°
3
Hist. Avg.
83°
62°
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 80° to 95°, with overnight lows between 59° and 74°. The average high for September is 89° with an average low of 68°. 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.
