S
M
T
W
T
F
S
26
78°
63°
27
81°
64°
28
81°
63°
29
76°
63°
30
79°
64°
31
80°
64°
1
81°
63°
2
80°
62°
3
81°
63°
4
82°
58°
5
81°
54°
6
74°
56°
7
75°
59°
8
76°
57°
9
74°
56°
10
72°
55°
11
73°
61°
12
79°
61°
13
77°
57°
14
74°
54°
15
72°
53°
16
73°
56°
17
75°
56°
18
72°
54°
19
72°
53°
20
73°
52°
21
73°
55°
22
76°
60°
23
79°
60°
24
79°
59°
25
80°
59°
26
78°
60°
27
79°
58°
28
78°
57°
29
77°
58°
30
76°
52°
31
72°
48°
1
68°
50°
2
67°
49°
3
67°
48°
4
68°
49°
5
67°
48°
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 67° to 82°, with overnight lows between 48° and 64°. The average high for August is 76° with an average low of 57°. 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.
