S
M
T
W
T
F
S
26
84°
69°
27
87°
70°
28
88°
69°
29
87°
68°
30
86°
67°
31
79°
67°
1
82°
68°
2
87°
70°
3
89°
70°
4
88°
69°
5
89°
68°
6
87°
69°
7
84°
67°
8
84°
64°
9
83°
59°
10
80°
60°
11
79°
62°
12
80°
59°
13
79°
60°
14
79°
59°
15
77°
64°
16
79°
64°
17
84°
62°
18
78°
60°
19
78°
59°
20
81°
61°
21
82°
63°
22
82°
63°
23
84°
66°
24
84°
66°
25
85°
65°
26
86°
65°
27
85°
57°
28
82°
57°
29
77°
59°
30
76°
57°
31
77°
56°
1
76°
57°
2
75°
55°
3
75°
54°
4
76°
56°
5
78°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Plainfield
Plainfield's August 2026 forecast shows daily high temperatures ranging from 75° to 89°, with overnight lows between 54° and 70°. The average high for August is 82° 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 Plainfield. See also: September | October | November.
