S
M
T
W
T
F
S
26
79°
50°
27
86°
50°
28
81°
65°
29
73°
67°
30
75°
62°
31
80°
60°
1
85°
63°
2
82°
69°
3
76°
65°
4
84°
60°
5
85°
59°
6
89°
69°
7
93°
73°
8
88°
68°
9
87°
68°
10
84°
60°
11
83°
64°
12
83°
62°
13
84°
63°
14
81°
60°
15
79°
55°
16
79°
54°
17
72°
64°
18
84°
64°
19
84°
66°
20
84°
62°
21
67°
62°
22
70°
64°
23
76°
64°
24
82°
57°
25
79°
58°
26
81°
59°
27
83°
66°
28
81°
61°
29
80°
60°
30
81°
61°
31
78°
60°
1
75°
59°
2
74°
61°
3
75°
59°
4
74°
58°
5
77°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Blackstone
Blackstone's August 2026 forecast shows daily high temperatures ranging from 74° to 83°, with overnight lows between 57° and 66°. The average high for August is 78° 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 August weather will actually feel in Blackstone. See also: September | October | November.