S
M
T
W
T
F
S
28
86°
61°
29
92°
64°
30
90°
66°
1
95°
75°
2
101°
79°
3
102°
77°
4
100°
74°
5
94°
70°
6
88°
68°
7
88°
68°
8
87°
68°
9
90°
67°
10
91°
71°
11
92°
69°
12
94°
68°
13
93°
71°
14
94°
66°
15
82°
62°
16
83°
63°
17
87°
65°
18
85°
65°
19
90°
67°
20
88°
69°
21
83°
69°
22
84°
68°
23
85°
69°
24
84°
68°
25
85°
68°
26
86°
67°
27
88°
69°
28
88°
68°
29
87°
69°
30
89°
70°
31
90°
70°
1
89°
69°
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 82° to 102°, with overnight lows between 62° and 79°. The average high for July is 89° with an average low of 69°. 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.