S
M
T
W
T
F
S
30
73°
39°
31
65°
39°
1
64°
39°
2
64°
38°
3
66°
37°
4
69°
38°
5
70°
38°
6
70°
37°
7
67°
37°
8
64°
35°
9
62°
34°
10
64°
33°
11
69°
36°
12
71°
32°
13
61°
28°
14
66°
34°
15
70°
36°
16
70°
35°
17
69°
35°
18
69°
34°
19
68°
35°
20
65°
34°
21
64°
34°
22
59°
33°
23
58°
34°
24
57°
33°
25
57°
33°
26
58°
30°
27
64°
32°
28
66°
24°
29
54°
24°
30
54°
25°
1
55°
27°
2
62°
27°
3
60°
26°
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 54° to 73°, with overnight lows between 24° and 39°. The average high for September is 64° with an average low of 33°. 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.
