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
78°
56°
18
77°
55°
19
74°
50°
20
78°
52°
21
66°
54°
22
79°
50°
23
80°
57°
24
84°
56°
25
78°
60°
26
79°
62°
27
80°
71°
28
90°
73°
29
91°
74°
30
92°
74°
1
90°
73°
2
89°
72°
3
90°
67°
4
89°
67°
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 78° to 92°, with overnight lows between 56° and 74°. The average high for June is 87° with an average low of 68°. 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.
