S
M
T
W
T
F
S
28
88°
69°
29
90°
74°
30
91°
75°
1
90°
75°
2
91°
64°
3
86°
65°
4
83°
65°
5
83°
65°
6
83°
66°
7
86°
64°
8
86°
67°
9
83°
66°
10
82°
68°
11
83°
64°
12
84°
62°
13
86°
62°
14
91°
68°
15
90°
69°
16
91°
70°
17
93°
70°
18
92°
70°
19
90°
68°
20
89°
63°
21
86°
62°
22
81°
59°
23
79°
61°
24
82°
61°
25
83°
63°
26
86°
65°
27
83°
62°
28
80°
64°
29
77°
64°
30
78°
63°
31
79°
65°
1
78°
66°
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 77° to 93°, with overnight lows between 59° and 70°. The average high for July is 85° with an average low of 65°. 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.
