S
M
T
W
T
F
S
31
69°
55°
1
80°
57°
2
82°
53°
3
85°
63°
4
82°
67°
5
80°
65°
6
86°
64°
7
84°
64°
8
78°
67°
9
85°
68°
10
84°
66°
11
87°
64°
12
85°
66°
13
86°
63°
14
85°
64°
15
85°
62°
16
88°
69°
17
83°
66°
18
79°
64°
19
82°
66°
20
84°
60°
21
78°
58°
22
78°
61°
23
80°
68°
24
88°
69°
25
88°
67°
26
82°
65°
27
80°
66°
28
82°
67°
29
83°
66°
30
85°
66°
1
83°
67°
2
85°
68°
3
87°
68°
4
86°
69°
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 88°, with overnight lows between 58° and 69°. 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.
