S
M
T
W
T
F
S
26
83°
61°
27
84°
62°
28
85°
61°
29
84°
62°
30
85°
63°
31
84°
63°
1
83°
62°
2
78°
58°
3
78°
55°
4
79°
59°
5
77°
57°
6
78°
57°
7
80°
60°
8
83°
61°
9
84°
62°
10
84°
62°
11
83°
61°
12
84°
61°
13
84°
62°
14
87°
61°
15
86°
62°
16
83°
62°
17
80°
61°
18
85°
62°
19
82°
58°
20
82°
54°
21
78°
51°
22
76°
52°
23
77°
54°
24
78°
54°
25
77°
51°
26
76°
57°
27
77°
53°
28
76°
51°
29
75°
51°
30
75°
50°
31
76°
49°
1
74°
51°
2
75°
51°
3
73°
52°
4
73°
51°
5
75°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Big Flats
Big Flats's August 2026 forecast shows daily high temperatures ranging from 73° to 87°, with overnight lows between 49° and 63°. The average high for August is 80° with an average low of 57°. 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 Big Flats. See also: September | October | November.