S
M
T
W
T
F
S
31
72°
52°
1
69°
50°
2
70°
55°
3
75°
58°
4
78°
59°
5
73°
58°
6
76°
55°
7
72°
53°
8
74°
55°
9
75°
54°
10
75°
56°
11
79°
61°
12
80°
61°
13
80°
62°
14
81°
63°
15
81°
63°
16
80°
62°
17
82°
62°
18
81°
60°
19
82°
62°
20
83°
64°
21
82°
64°
22
84°
63°
23
83°
63°
24
83°
55°
25
80°
54°
26
76°
55°
27
77°
57°
28
79°
56°
29
77°
56°
30
77°
57°
1
78°
62°
2
78°
57°
3
79°
57°
4
77°
58°
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 69° to 84°, with overnight lows between 50° and 64°. The average high for June is 78° with an average low of 58°. 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.
