S
M
T
W
T
F
S
31
76°
54°
1
77°
54°
2
76°
51°
3
67°
46°
4
75°
51°
5
76°
47°
6
67°
46°
7
66°
49°
8
66°
49°
9
67°
50°
10
68°
51°
11
77°
55°
12
70°
55°
13
74°
56°
14
76°
56°
15
71°
54°
16
73°
56°
17
69°
54°
18
71°
52°
19
73°
49°
20
75°
53°
21
77°
50°
22
74°
48°
23
77°
53°
24
74°
52°
25
74°
52°
26
78°
55°
27
80°
52°
28
78°
49°
29
74°
52°
30
75°
50°
1
75°
50°
2
78°
52°
3
78°
48°
4
79°
49°
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 66° to 80°, with overnight lows between 46° and 56°. The average high for June is 74° with an average low of 51°. 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.
