S
M
T
W
T
F
S
30
88°
76°
31
88°
75°
1
87°
74°
2
87°
75°
3
86°
73°
4
87°
75°
5
88°
74°
6
86°
74°
7
87°
75°
8
Hist. Avg.
85°
72°
9
Hist. Avg.
84°
72°
10
Hist. Avg.
84°
72°
11
Hist. Avg.
84°
72°
12
Hist. Avg.
84°
72°
13
Hist. Avg.
84°
72°
14
Hist. Avg.
84°
71°
15
Hist. Avg.
83°
71°
16
Hist. Avg.
83°
71°
17
Hist. Avg.
83°
71°
18
Hist. Avg.
83°
71°
19
Hist. Avg.
82°
70°
20
Hist. Avg.
82°
70°
21
Hist. Avg.
82°
70°
22
Hist. Avg.
82°
70°
23
Hist. Avg.
81°
69°
24
Hist. Avg.
81°
69°
25
Hist. Avg.
81°
69°
26
Hist. Avg.
81°
68°
27
Hist. Avg.
80°
68°
28
Hist. Avg.
80°
68°
29
Hist. Avg.
80°
68°
30
Hist. Avg.
80°
67°
1
Hist. Avg.
79°
67°
2
Hist. Avg.
79°
66°
3
Hist. Avg.
79°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Frisco
Frisco's September 2026 forecast shows daily high temperatures ranging from 86° to 88°, with overnight lows between 73° and 76°. The average high for September is 87° with an average low of 75°. 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.
