S
M
T
W
T
F
S
26
89°
68°
27
84°
69°
28
82°
66°
29
80°
63°
30
85°
60°
31
77°
67°
1
71°
65°
2
78°
66°
3
83°
62°
4
85°
65°
5
81°
69°
6
80°
67°
7
85°
66°
8
83°
66°
9
86°
64°
10
88°
68°
11
80°
68°
12
82°
68°
13
80°
69°
14
79°
66°
15
82°
68°
16
82°
62°
17
78°
62°
18
77°
61°
19
79°
64°
20
82°
66°
21
81°
63°
22
82°
62°
23
81°
61°
24
76°
64°
25
79°
65°
26
82°
66°
27
83°
65°
28
83°
64°
29
75°
61°
30
74°
61°
31
74°
60°
1
75°
62°
2
77°
64°
3
75°
64°
4
81°
65°
5
82°
64°
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 74° to 88°, with overnight lows between 60° and 69°. The average high for August is 80° with an average low of 64°. 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.
