S
M
T
W
T
F
S
31
79°
42°
1
79°
44°
2
82°
51°
3
83°
48°
4
83°
46°
5
83°
64°
6
77°
58°
7
70°
48°
8
74°
42°
9
76°
41°
10
77°
41°
11
81°
42°
12
78°
44°
13
75°
43°
14
82°
51°
15
80°
45°
16
82°
45°
17
80°
46°
18
86°
48°
19
74°
43°
20
70°
34°
21
74°
31°
22
78°
37°
23
68°
54°
24
71°
61°
25
66°
59°
26
81°
57°
27
78°
58°
28
86°
51°
29
83°
45°
30
78°
45°
1
68°
36°
2
68°
33°
3
77°
34°
4
85°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Cornish Flat
Cornish Flat's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September is ° with an average low of °. 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 Cornish Flat. See also: October | November | December.
