S
M
T
W
T
F
S
30
65°
41°
31
65°
37°
1
68°
37°
2
69°
34°
3
71°
37°
4
72°
34°
5
75°
38°
6
76°
38°
7
71°
43°
8
73°
39°
9
73°
33°
10
72°
29°
11
71°
31°
12
72°
34°
13
73°
36°
14
62°
44°
15
65°
43°
16
68°
40°
17
58°
47°
18
63°
37°
19
58°
35°
20
60°
28°
21
64°
26°
22
66°
31°
23
59°
41°
24
51°
42°
25
51°
34°
26
62°
30°
27
63°
30°
28
50°
35°
29
58°
39°
30
43°
35°
1
56°
30°
2
72°
40°
3
74°
43°
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 72° to 74°, with overnight lows between 40° and 43°. The average high for September is 73° with an average low of 42°. 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.
