S
M
T
W
T
F
S
26
79°
61°
27
80°
63°
28
80°
60°
29
81°
60°
30
80°
66°
31
86°
66°
1
87°
67°
2
87°
67°
3
86°
66°
4
87°
59°
5
80°
58°
6
78°
56°
7
77°
57°
8
77°
57°
9
78°
58°
10
79°
61°
11
80°
62°
12
85°
64°
13
86°
65°
14
85°
64°
15
86°
58°
16
81°
57°
17
79°
56°
18
79°
58°
19
81°
59°
20
76°
56°
21
78°
56°
22
79°
61°
23
83°
62°
24
84°
62°
25
82°
54°
26
77°
60°
27
79°
63°
28
78°
62°
29
84°
63°
30
85°
61°
31
83°
60°
1
78°
59°
2
81°
58°
3
76°
59°
4
76°
61°
5
82°
56°
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 76° to 87°, with overnight lows between 54° and 67°. The average high for August is 81° with an average low of 60°. 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.
