S
M
T
W
T
F
S
28
75°
57°
29
81°
58°
30
81°
52°
1
80°
56°
2
79°
57°
3
74°
51°
4
75°
52°
5
77°
54°
6
77°
51°
7
75°
52°
8
74°
51°
9
73°
51°
10
75°
57°
11
78°
59°
12
77°
56°
13
77°
56°
14
75°
53°
15
76°
54°
16
78°
57°
17
82°
58°
18
82°
60°
19
83°
60°
20
78°
57°
21
80°
61°
22
84°
59°
23
81°
58°
24
82°
59°
25
82°
53°
26
76°
53°
27
74°
50°
28
75°
51°
29
75°
50°
30
76°
50°
31
77°
51°
1
79°
52°
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 84°, with overnight lows between 50° and 61°. The average high for July is 78° with an average low of 55°. 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.
