S
M
T
W
T
F
S
31
75°
53°
1
67°
52°
2
66°
53°
3
68°
54°
4
73°
57°
5
70°
56°
6
70°
53°
7
68°
51°
8
68°
51°
9
70°
50°
10
69°
53°
11
74°
60°
12
74°
59°
13
72°
60°
14
79°
61°
15
79°
62°
16
80°
62°
17
80°
61°
18
73°
60°
19
77°
61°
20
80°
62°
21
80°
63°
22
81°
61°
23
82°
62°
24
83°
56°
25
82°
55°
26
75°
55°
27
76°
59°
28
81°
58°
29
81°
55°
30
76°
56°
1
76°
55°
2
75°
56°
3
76°
55°
4
76°
57°
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 66° to 83°, with overnight lows between 50° and 63°. The average high for June is 75° 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.
