S
M
T
W
T
F
S
26
93°
71°
27
94°
71°
28
87°
66°
29
90°
65°
30
86°
69°
31
73°
63°
1
85°
61°
2
83°
56°
3
84°
63°
4
75°
58°
5
77°
54°
6
80°
50°
7
78°
61°
8
80°
54°
9
85°
64°
10
86°
64°
11
88°
67°
12
87°
68°
13
79°
64°
14
82°
62°
15
79°
67°
16
82°
63°
17
84°
56°
18
83°
60°
19
79°
52°
20
79°
52°
21
81°
62°
22
80°
53°
23
78°
46°
24
82°
50°
25
79°
63°
26
81°
58°
27
82°
54°
28
82°
49°
29
85°
66°
30
89°
64°
31
92°
64°
1
88°
59°
2
88°
64°
3
88°
70°
4
93°
69°
5
83°
65°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Dennison
Dennison's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Dennison. See also: September | October | November.