S
M
T
W
T
F
S
31
64°
55°
1
66°
57°
2
64°
55°
3
66°
54°
4
63°
54°
5
61°
50°
6
64°
50°
7
63°
54°
8
59°
52°
9
61°
50°
10
59°
46°
11
63°
48°
12
68°
55°
13
61°
54°
14
63°
52°
15
64°
50°
16
72°
60°
17
69°
57°
18
73°
61°
19
73°
58°
20
66°
55°
21
74°
61°
22
70°
57°
23
68°
59°
24
70°
60°
25
73°
60°
26
73°
60°
27
72°
60°
28
73°
59°
29
65°
53°
30
68°
53°
1
64°
51°
2
63°
51°
3
63°
50°
4
64°
51°
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 63° to 74°, with overnight lows between 50° and 61°. The average high for June is 69° with an average low of 57°. 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.
