S
M
T
W
T
F
S
28
85°
63°
29
90°
70°
30
90°
70°
1
89°
68°
2
85°
65°
3
87°
70°
4
91°
70°
5
91°
66°
6
88°
64°
7
85°
64°
8
84°
63°
9
84°
63°
10
83°
64°
11
85°
65°
12
86°
69°
13
88°
70°
14
87°
64°
15
87°
67°
16
89°
66°
17
87°
71°
18
88°
70°
19
86°
65°
20
85°
65°
21
85°
64°
22
86°
64°
23
86°
71°
24
90°
71°
25
91°
69°
26
90°
67°
27
85°
64°
28
85°
64°
29
86°
67°
30
85°
70°
31
91°
65°
1
88°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Waterloo
Waterloo's July 2026 forecast shows daily high temperatures ranging from 83° to 91°, with overnight lows between 63° and 71°. The average high for July is 87° with an average low of 67°. 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 Waterloo. See also: August | September | October.
