S
M
T
W
T
F
S
28
74°
60°
29
74°
59°
30
75°
57°
1
74°
56°
2
75°
62°
3
78°
64°
4
81°
62°
5
75°
57°
6
74°
56°
7
75°
60°
8
78°
65°
9
80°
65°
10
78°
64°
11
78°
60°
12
76°
58°
13
85°
58°
14
82°
58°
15
77°
57°
16
79°
58°
17
78°
56°
18
77°
60°
19
78°
64°
20
77°
58°
21
81°
64°
22
82°
59°
23
78°
58°
24
79°
59°
25
81°
65°
26
84°
65°
27
84°
58°
28
81°
57°
29
78°
60°
30
78°
64°
31
79°
60°
1
77°
58°
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 74° to 85°, with overnight lows between 56° and 65°. The average high for July is 78° with an average low of 60°. 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.
