S
M
T
W
T
F
S
28
80°
64°
29
85°
70°
30
84°
70°
1
84°
69°
2
88°
71°
3
89°
68°
4
81°
63°
5
80°
62°
6
81°
63°
7
82°
65°
8
86°
71°
9
82°
71°
10
88°
70°
11
89°
72°
12
88°
72°
13
85°
71°
14
85°
68°
15
84°
71°
16
82°
71°
17
89°
73°
18
90°
72°
19
87°
67°
20
85°
66°
21
84°
68°
22
88°
64°
23
90°
63°
24
81°
61°
25
82°
64°
26
82°
64°
27
83°
66°
28
84°
65°
29
85°
69°
30
84°
70°
31
89°
70°
1
89°
69°
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 80° to 90°, with overnight lows between 61° and 73°. The average high for July is 85° with an average low of 68°. 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.
