S
M
T
W
T
F
S
26
83°
62°
27
84°
63°
28
83°
62°
29
84°
62°
30
84°
63°
31
85°
62°
1
88°
65°
2
90°
67°
3
87°
67°
4
88°
64°
5
87°
67°
6
87°
61°
7
83°
60°
8
83°
60°
9
84°
61°
10
84°
61°
11
85°
62°
12
84°
61°
13
88°
63°
14
87°
65°
15
89°
66°
16
89°
64°
17
88°
66°
18
88°
65°
19
87°
62°
20
82°
62°
21
87°
64°
22
87°
64°
23
86°
63°
24
86°
64°
25
87°
64°
26
87°
63°
27
86°
63°
28
87°
64°
29
85°
64°
30
86°
63°
31
86°
63°
1
85°
62°
2
83°
62°
3
84°
61°
4
85°
63°
5
85°
62°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Fincastle
Fincastle's August 2026 forecast shows daily high temperatures ranging from 82° to 90°, with overnight lows between 60° and 67°. The average high for August is 86° with an average low of 63°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Fincastle. See also: September | October | November.