S
M
T
W
T
F
S
31
73°
55°
1
72°
52°
2
73°
54°
3
74°
61°
4
77°
64°
5
84°
64°
6
83°
63°
7
82°
64°
8
83°
63°
9
76°
57°
10
76°
55°
11
75°
56°
12
75°
64°
13
77°
56°
14
75°
56°
15
75°
57°
16
77°
63°
17
80°
66°
18
84°
66°
19
86°
67°
20
87°
68°
21
87°
68°
22
86°
67°
23
87°
68°
24
86°
67°
25
86°
68°
26
81°
63°
27
82°
65°
28
82°
58°
29
80°
60°
30
82°
65°
1
83°
69°
2
88°
69°
3
87°
68°
4
90°
65°
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 72° to 90°, with overnight lows between 52° and 69°. The average high for June is 81° with an average low of 63°. 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.
