S
M
T
W
T
F
S
31
77°
43°
1
70°
50°
2
78°
44°
3
82°
53°
4
89°
58°
5
91°
59°
6
91°
67°
7
87°
65°
8
71°
55°
9
83°
51°
10
85°
63°
11
97°
71°
12
96°
72°
13
80°
70°
14
84°
66°
15
80°
65°
16
73°
67°
17
74°
67°
18
82°
66°
19
80°
63°
20
79°
64°
21
83°
65°
22
76°
63°
23
79°
63°
24
76°
64°
25
77°
65°
26
81°
64°
27
77°
61°
28
76°
62°
29
75°
62°
30
76°
63°
1
77°
62°
2
78°
63°
3
79°
68°
4
79°
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 73° to 84°, with overnight lows between 61° and 70°. The average high for June is 78° with an average low of 64°. 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.
