S
M
T
W
T
F
S
31
77°
60°
1
79°
61°
2
83°
64°
3
84°
65°
4
82°
64°
5
83°
63°
6
84°
64°
7
81°
65°
8
79°
65°
9
82°
63°
10
84°
65°
11
85°
66°
12
81°
66°
13
84°
67°
14
85°
67°
15
82°
66°
16
85°
68°
17
87°
69°
18
87°
68°
19
86°
69°
20
88°
69°
21
88°
68°
22
87°
68°
23
87°
69°
24
86°
63°
25
85°
62°
26
83°
61°
27
84°
63°
28
86°
63°
29
83°
64°
30
84°
64°
1
84°
69°
2
90°
70°
3
90°
70°
4
89°
63°
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 90°, with overnight lows between 60° and 70°. The average high for June is 84° with an average low of 65°. 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.
