S
M
T
W
T
F
S
31
90°
68°
1
88°
68°
2
84°
63°
3
82°
59°
4
82°
59°
5
86°
59°
6
86°
64°
7
82°
68°
8
82°
73°
9
92°
72°
10
91°
71°
11
93°
72°
12
82°
68°
13
90°
66°
14
84°
72°
15
81°
66°
16
84°
70°
17
88°
72°
18
81°
69°
19
80°
63°
20
82°
60°
21
85°
70°
22
86°
68°
23
82°
66°
24
83°
68°
25
84°
66°
26
85°
65°
27
88°
66°
28
87°
65°
29
84°
67°
30
84°
64°
1
83°
64°
2
87°
69°
3
88°
69°
4
89°
68°
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 80° to 89°, with overnight lows between 60° and 72°. The average high for June is 85° with an average low of 67°. 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.
