S
M
T
W
T
F
S
28
79°
58°
29
79°
58°
30
80°
60°
1
80°
59°
2
79°
57°
3
78°
59°
4
78°
57°
5
78°
57°
6
79°
59°
7
80°
61°
8
80°
64°
9
82°
64°
10
80°
63°
11
81°
64°
12
86°
67°
13
86°
67°
14
84°
66°
15
83°
67°
16
84°
66°
17
86°
68°
18
88°
68°
19
87°
67°
20
88°
68°
21
89°
68°
22
88°
67°
23
85°
67°
24
85°
60°
25
87°
59°
26
79°
60°
27
78°
59°
28
79°
60°
29
80°
64°
30
80°
67°
31
81°
64°
1
80°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Plainfield
Plainfield's July 2026 forecast shows daily high temperatures ranging from 78° to 89°, with overnight lows between 57° and 68°. The average high for July 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 July weather will actually feel in Plainfield. See also: August | September | October.