S
M
T
W
T
F
S
28
74°
62°
29
70°
59°
30
68°
58°
1
69°
57°
2
63°
51°
3
63°
50°
4
64°
51°
5
64°
54°
6
65°
52°
7
65°
51°
8
66°
51°
9
66°
52°
10
65°
51°
11
65°
51°
12
69°
56°
13
70°
55°
14
69°
54°
15
70°
54°
16
70°
55°
17
71°
57°
18
71°
57°
19
72°
56°
20
70°
57°
21
69°
57°
22
70°
56°
23
70°
57°
24
68°
54°
25
66°
56°
26
67°
56°
27
70°
53°
28
68°
53°
29
70°
54°
30
72°
55°
31
71°
56°
1
70°
55°
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 63° to 74°, with overnight lows between 50° and 62°. The average high for July is 68° 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.
