S
M
T
W
T
F
S
30
101°
81°
31
102°
80°
1
100°
76°
2
96°
75°
3
89°
74°
4
96°
73°
5
96°
74°
6
100°
75°
7
101°
76°
8
100°
75°
9
99°
76°
10
96°
73°
11
96°
72°
12
92°
72°
13
93°
71°
14
89°
66°
15
92°
71°
16
91°
70°
17
92°
71°
18
92°
71°
19
91°
70°
20
91°
70°
21
90°
69°
22
88°
69°
23
89°
68°
24
90°
68°
25
90°
67°
26
89°
67°
27
90°
68°
28
90°
67°
29
89°
66°
30
90°
67°
1
89°
67°
2
88°
66°
3
88°
66°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Forney
Forney's September 2026 forecast shows daily high temperatures ranging from 88° to 101°, with overnight lows between 66° and 76°. The average high for September is 92° with an average low of 70°. 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 Forney. See also: October | November | December.