S
M
T
W
T
F
S
31
65°
49°
1
68°
50°
2
68°
51°
3
67°
50°
4
65°
52°
5
68°
53°
6
73°
52°
7
74°
54°
8
75°
54°
9
76°
47°
10
66°
45°
11
67°
45°
12
66°
46°
13
67°
45°
14
68°
52°
15
69°
49°
16
70°
50°
17
69°
50°
18
69°
53°
19
70°
50°
20
69°
48°
21
69°
49°
22
71°
57°
23
75°
58°
24
77°
57°
25
72°
57°
26
71°
55°
27
72°
56°
28
75°
57°
29
81°
58°
30
81°
52°
1
80°
56°
2
79°
57°
3
74°
51°
4
75°
52°
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 65° to 81°, with overnight lows between 45° and 58°. The average high for June is 71° with an average low of 52°. 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.
