S
M
T
W
T
F
S
28
88°
69°
29
90°
74°
30
91°
75°
1
90°
75°
2
91°
64°
3
88°
70°
4
86°
66°
5
82°
64°
6
84°
64°
7
86°
66°
8
87°
68°
9
85°
65°
10
83°
66°
11
82°
65°
12
85°
66°
13
85°
65°
14
88°
66°
15
86°
65°
16
85°
62°
17
79°
62°
18
82°
66°
19
85°
67°
20
86°
66°
21
86°
66°
22
87°
67°
23
87°
67°
24
86°
66°
25
83°
66°
26
84°
67°
27
85°
66°
28
86°
67°
29
86°
65°
30
85°
66°
31
81°
65°
1
78°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Grinnell
Grinnell's July 2026 forecast shows daily high temperatures ranging from 78° to 88°, with overnight lows between 60° and 70°. 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 Grinnell. See also: August | September | October.
