S
M
T
W
T
F
S
31
78°
59°
1
78°
60°
2
76°
57°
3
80°
62°
4
81°
63°
5
81°
63°
6
80°
64°
7
81°
64°
8
79°
63°
9
80°
64°
10
82°
65°
11
82°
65°
12
81°
64°
13
76°
63°
14
76°
59°
15
77°
58°
16
76°
58°
17
78°
62°
18
83°
65°
19
78°
59°
20
77°
60°
21
80°
62°
22
79°
63°
23
81°
60°
24
80°
58°
25
79°
58°
26
80°
61°
27
83°
61°
28
80°
64°
29
87°
68°
30
87°
65°
1
86°
60°
2
81°
60°
3
81°
68°
4
87°
66°
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 76° to 87°, with overnight lows between 57° and 68°. The average high for June is 80° with an average low of 62°. 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.
