S
M
T
W
T
F
S
31
83°
62°
1
80°
61°
2
87°
67°
3
82°
63°
4
80°
61°
5
75°
57°
6
74°
62°
7
75°
62°
8
78°
64°
9
82°
64°
10
84°
65°
11
83°
64°
12
81°
64°
13
78°
59°
14
78°
58°
15
80°
62°
16
82°
65°
17
79°
65°
18
78°
66°
19
83°
67°
20
80°
63°
21
77°
61°
22
75°
59°
23
77°
59°
24
78°
65°
25
79°
67°
26
83°
60°
27
78°
59°
28
79°
59°
29
79°
64°
30
80°
68°
1
84°
68°
2
81°
67°
3
89°
61°
4
88°
60°
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 89°, with overnight lows between 57° and 68°. The average high for June is 80° with an average low of 63°. 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.
