S
M
T
W
T
F
S
30
87°
72°
31
87°
71°
1
86°
71°
2
86°
70°
3
88°
71°
4
90°
67°
5
92°
73°
6
92°
68°
7
93°
73°
8
94°
72°
9
91°
71°
10
93°
69°
11
85°
67°
12
89°
68°
13
87°
69°
14
87°
71°
15
91°
70°
16
91°
70°
17
90°
69°
18
86°
69°
19
86°
68°
20
85°
68°
21
84°
67°
22
89°
69°
23
89°
68°
24
87°
67°
25
83°
64°
26
80°
63°
27
79°
61°
28
78°
58°
29
79°
60°
30
81°
67°
1
85°
63°
2
87°
57°
3
78°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Frisco
Frisco's September 2026 forecast shows daily high temperatures ranging from 78° to 94°, with overnight lows between 57° and 73°. The average high for September is 87° with an average low of 67°. 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 Frisco. See also: October | November | December.
