S
M
T
W
T
F
S
31
69°
55°
1
80°
57°
2
82°
53°
3
83°
54°
4
86°
61°
5
83°
67°
6
87°
69°
7
83°
69°
8
79°
68°
9
87°
65°
10
85°
68°
11
76°
58°
12
82°
56°
13
79°
60°
14
71°
51°
15
79°
46°
16
75°
57°
17
76°
58°
18
76°
52°
19
76°
58°
20
78°
60°
21
75°
55°
22
75°
54°
23
74°
58°
24
78°
62°
25
79°
60°
26
82°
61°
27
80°
64°
28
84°
64°
29
82°
62°
30
87°
66°
1
79°
62°
2
81°
63°
3
79°
60°
4
80°
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 74° to 87°, with overnight lows between 52° and 66°. The average high for June is 79° with an average low of 60°. 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.
