S
M
T
W
T
F
S
30
88°
66°
31
94°
69°
1
94°
68°
2
97°
70°
3
97°
71°
4
98°
73°
5
92°
70°
6
81°
70°
7
83°
66°
8
87°
59°
9
90°
62°
10
92°
70°
11
86°
69°
12
81°
69°
13
87°
67°
14
89°
65°
15
84°
62°
16
88°
67°
17
85°
66°
18
77°
58°
19
77°
55°
20
78°
58°
21
78°
57°
22
76°
56°
23
75°
54°
24
76°
58°
25
78°
53°
26
76°
53°
27
80°
57°
28
81°
57°
29
80°
56°
30
80°
58°
1
78°
56°
2
78°
52°
3
77°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Fincastle
Fincastle's September 2026 forecast shows daily high temperatures ranging from 75° to 92°, with overnight lows between 52° and 70°. The average high for September is 81° with an average low of 60°. 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 Fincastle. See also: October | November | December.