S
M
T
W
T
F
S
26
91°
72°
27
86°
72°
28
75°
70°
29
77°
64°
30
88°
63°
31
82°
64°
1
73°
68°
2
77°
70°
3
82°
66°
4
88°
66°
5
86°
72°
6
82°
70°
7
90°
70°
8
82°
66°
9
88°
64°
10
86°
73°
11
79°
68°
12
84°
70°
13
79°
70°
14
79°
70°
15
84°
73°
16
90°
73°
17
77°
66°
18
84°
64°
19
81°
68°
20
77°
64°
21
82°
63°
22
81°
68°
23
77°
64°
24
77°
59°
25
81°
66°
26
86°
66°
27
81°
68°
28
86°
64°
29
82°
64°
30
81°
68°
31
93°
72°
1
97°
75°
2
99°
79°
3
95°
79°
4
95°
77°
5
84°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Griffith
Griffith'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 Griffith. See also: September | October | November.