S
M
T
W
T
F
S
26
81°
59°
27
82°
60°
28
82°
60°
29
83°
62°
30
84°
66°
31
87°
65°
1
89°
66°
2
89°
66°
3
87°
65°
4
88°
59°
5
83°
57°
6
81°
57°
7
80°
58°
8
80°
57°
9
81°
58°
10
82°
59°
11
83°
61°
12
85°
63°
13
87°
64°
14
88°
65°
15
89°
62°
16
88°
58°
17
81°
57°
18
81°
56°
19
82°
58°
20
81°
58°
21
80°
60°
22
81°
56°
23
83°
62°
24
86°
64°
25
84°
58°
26
86°
58°
27
82°
63°
28
84°
63°
29
86°
62°
30
87°
63°
31
86°
60°
1
84°
61°
2
85°
59°
3
84°
58°
4
79°
60°
5
86°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Gridley
Gridley's August 2026 forecast shows daily high temperatures ranging from 79° to 89°, with overnight lows between 56° and 66°. The average high for August is 84° with an average low of 61°. 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 Gridley. See also: September | October | November.