S
M
T
W
T
F
S
29
69°
32°
30
76°
50°
31
79°
60°
1
84°
58°
2
83°
60°
3
79°
61°
4
79°
63°
5
72°
48°
6
68°
47°
7
72°
44°
8
68°
42°
9
73°
48°
10
78°
47°
11
75°
49°
12
74°
50°
13
76°
51°
14
77°
48°
15
77°
54°
16
78°
53°
17
78°
53°
18
70°
52°
19
74°
53°
20
76°
53°
21
77°
54°
22
79°
54°
23
80°
55°
24
80°
56°
25
79°
57°
26
81°
57°
27
81°
55°
28
73°
52°
29
79°
55°
30
80°
56°
1
75°
56°
2
74°
54°
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 68° to 84°, with overnight lows between 42° and 63°. The average high for April is 77° with an average low of 53°. 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.
