S
M
T
W
T
F
S
26
88°
70°
27
83°
63°
28
84°
63°
29
85°
69°
30
87°
63°
31
86°
63°
1
85°
64°
2
84°
62°
3
84°
62°
4
85°
63°
5
84°
62°
6
84°
62°
7
85°
63°
8
85°
64°
9
88°
68°
10
88°
63°
11
86°
65°
12
91°
70°
13
92°
62°
14
88°
61°
15
84°
61°
16
84°
62°
17
85°
63°
18
85°
62°
19
84°
61°
20
82°
59°
21
83°
60°
22
83°
58°
23
81°
59°
24
82°
59°
25
84°
66°
26
83°
67°
27
89°
67°
28
91°
65°
29
90°
57°
30
84°
58°
31
83°
63°
1
84°
63°
2
83°
57°
3
81°
56°
4
80°
63°
5
80°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Griggsville
Griggsville's August 2026 forecast shows daily high temperatures ranging from 80° to 92°, with overnight lows between 56° and 70°. The average high for August is 85° 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 Griggsville. See also: September | October | November.