S
M
T
W
T
F
S
28
88°
70°
29
87°
70°
30
88°
65°
1
81°
63°
2
80°
63°
3
82°
68°
4
83°
68°
5
87°
69°
6
89°
65°
7
84°
63°
8
84°
69°
9
88°
70°
10
90°
63°
11
89°
64°
12
82°
62°
13
83°
64°
14
83°
63°
15
84°
63°
16
83°
64°
17
83°
61°
18
84°
63°
19
84°
64°
20
86°
67°
21
87°
69°
22
87°
67°
23
84°
68°
24
84°
63°
25
85°
62°
26
83°
63°
27
83°
68°
28
86°
69°
29
88°
70°
30
89°
69°
31
87°
70°
1
88°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Mattoon
Mattoon's July 2026 forecast shows daily high temperatures ranging from 80° to 90°, with overnight lows between 61° and 71°. The average high for July is 85° with an average low of 66°. 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 Mattoon. See also: August | September | October.
