S
M
T
W
T
F
S
31
76°
46°
1
76°
52°
2
78°
51°
3
82°
49°
4
85°
52°
5
84°
61°
6
85°
66°
7
86°
63°
8
86°
64°
9
87°
70°
10
90°
69°
11
88°
66°
12
79°
64°
13
82°
60°
14
76°
55°
15
73°
48°
16
76°
55°
17
70°
55°
18
71°
54°
19
76°
52°
20
78°
57°
21
72°
54°
22
74°
57°
23
76°
55°
24
77°
53°
25
79°
57°
26
67°
61°
27
78°
60°
28
82°
67°
29
90°
70°
30
90°
71°
1
93°
72°
2
95°
71°
3
86°
66°
4
86°
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 67° to 95°, with overnight lows between 57° and 72°. The average high for June is 85° with an average low of 66°. 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.
