S
M
T
W
T
F
S
31
84°
60°
1
83°
56°
2
85°
58°
3
80°
59°
4
82°
60°
5
85°
61°
6
85°
62°
7
84°
64°
8
87°
62°
9
88°
70°
10
81°
62°
11
78°
61°
12
77°
64°
13
78°
64°
14
77°
63°
15
77°
65°
16
79°
65°
17
84°
58°
18
77°
57°
19
78°
58°
20
78°
60°
21
79°
63°
22
78°
62°
23
79°
63°
24
82°
66°
25
87°
67°
26
87°
68°
27
88°
67°
28
87°
68°
29
81°
68°
30
81°
67°
1
84°
67°
2
80°
62°
3
80°
63°
4
81°
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 77° to 88°, with overnight lows between 56° and 70°. The average high for June is 82° 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.
