S
M
T
W
T
F
S
29
85°
51°
30
90°
67°
31
89°
71°
1
80°
56°
2
86°
67°
3
82°
58°
4
64°
43°
5
71°
45°
6
72°
48°
7
70°
50°
8
74°
57°
9
79°
59°
10
76°
61°
11
73°
62°
12
75°
59°
13
76°
58°
14
76°
55°
15
75°
54°
16
73°
53°
17
72°
48°
18
73°
55°
19
76°
54°
20
77°
57°
21
77°
55°
22
76°
50°
23
69°
55°
24
77°
55°
25
78°
58°
26
79°
58°
27
76°
57°
28
74°
57°
29
68°
56°
30
68°
57°
1
69°
56°
2
68°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Waterloo
Waterloo's April 2026 forecast shows daily high temperatures ranging from 64° to 79°, with overnight lows between 43° and 62°. The average high for April is 73° with an average low of 55°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in Waterloo. See also: May | June | July.
