S
M
T
W
T
F
S
28
82°
53°
29
83°
56°
30
90°
65°
1
93°
74°
2
93°
71°
3
88°
67°
4
84°
64°
5
77°
59°
6
80°
61°
7
81°
60°
8
83°
62°
9
82°
61°
10
83°
62°
11
84°
61°
12
83°
63°
13
80°
61°
14
79°
56°
15
73°
53°
16
74°
56°
17
73°
57°
18
76°
57°
19
77°
60°
20
79°
60°
21
76°
59°
22
79°
60°
23
77°
60°
24
76°
59°
25
76°
60°
26
78°
61°
27
80°
61°
28
81°
60°
29
80°
62°
30
81°
61°
31
80°
61°
1
78°
60°
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 73° to 93°, with overnight lows between 53° and 74°. The average high for July is 80° with an average low of 61°. 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.
