S
M
T
W
T
F
S
31
82°
61°
1
82°
62°
2
83°
63°
3
83°
62°
4
77°
59°
5
75°
57°
6
78°
63°
7
79°
64°
8
78°
55°
9
76°
56°
10
78°
55°
11
80°
64°
12
82°
58°
13
81°
56°
14
78°
56°
15
79°
60°
16
79°
61°
17
80°
65°
18
82°
59°
19
86°
57°
20
80°
60°
21
78°
60°
22
81°
61°
23
81°
59°
24
80°
59°
25
81°
60°
26
81°
60°
27
84°
59°
28
82°
59°
29
82°
62°
30
83°
64°
1
81°
62°
2
84°
66°
3
86°
65°
4
85°
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 75° to 86°, with overnight lows between 55° and 69°. The average high for June is 81° with an average low of 61°. 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.
