S
M
T
W
T
F
S
30
96°
70°
31
96°
67°
1
95°
70°
2
94°
69°
3
94°
67°
4
89°
68°
5
93°
68°
6
93°
67°
7
94°
69°
8
94°
69°
9
93°
68°
10
94°
68°
11
93°
67°
12
93°
65°
13
92°
61°
14
84°
59°
15
84°
61°
16
86°
62°
17
90°
64°
18
90°
64°
19
85°
63°
20
89°
65°
21
92°
65°
22
91°
64°
23
90°
57°
24
91°
56°
25
81°
55°
26
82°
55°
27
Hist. Avg.
84°
60°
28
Hist. Avg.
84°
59°
29
Hist. Avg.
84°
59°
30
Hist. Avg.
84°
59°
1
Hist. Avg.
83°
58°
2
Hist. Avg.
83°
58°
3
Hist. Avg.
82°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Fort Griffin
Fort Griffin's September 2026 forecast shows daily high temperatures ranging from 81° to 96°, with overnight lows between 55° and 70°. The average high for September is 91° with an average low of 64°. 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 Fort Griffin. See also: October | November | December.
