S
M
T
W
T
F
S
31
72°
64°
1
84°
64°
2
73°
54°
3
77°
52°
4
82°
52°
5
85°
55°
6
86°
62°
7
86°
66°
8
87°
72°
9
84°
71°
10
88°
69°
11
92°
72°
12
93°
74°
13
94°
71°
14
92°
71°
15
86°
69°
16
75°
68°
17
86°
71°
18
83°
70°
19
84°
66°
20
87°
63°
21
89°
70°
22
88°
69°
23
86°
67°
24
85°
68°
25
87°
67°
26
86°
69°
27
88°
68°
28
91°
69°
29
89°
70°
30
89°
68°
1
88°
67°
2
88°
70°
3
90°
72°
4
91°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
June Weather in Waterloo
Waterloo's June 2026 forecast shows daily high temperatures ranging from 83° to 91°, with overnight lows between 63° and 72°. The average high for June is 88° with an average low of 69°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how June weather will actually feel in Waterloo. See also: July | August | September.
