S
M
T
W
T
F
S
28
87°
65°
29
84°
67°
30
84°
64°
1
83°
64°
2
87°
69°
3
88°
69°
4
89°
68°
5
86°
69°
6
84°
69°
7
88°
70°
8
88°
70°
9
87°
69°
10
85°
68°
11
86°
69°
12
89°
70°
13
90°
69°
14
89°
68°
15
84°
69°
16
85°
69°
17
85°
68°
18
86°
68°
19
84°
67°
20
83°
65°
21
84°
64°
22
84°
64°
23
85°
65°
24
85°
66°
25
86°
67°
26
85°
69°
27
87°
64°
28
86°
63°
29
86°
64°
30
87°
65°
31
90°
68°
1
92°
66°
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 83° to 92°, with overnight lows between 63° and 70°. The average high for July is 86° with an average low of 67°. 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.
