S
M
T
W
T
F
S
29
47°
30°
30
47°
23°
31
50°
23°
1
44°
33°
2
48°
37°
3
53°
29°
4
61°
26°
5
67°
32°
6
72°
32°
7
63°
35°
8
65°
37°
9
70°
36°
10
74°
42°
11
64°
43°
12
63°
42°
13
64°
41°
14
66°
40°
15
68°
42°
16
69°
40°
17
72°
42°
18
72°
42°
19
70°
39°
20
67°
36°
21
61°
37°
22
61°
32°
23
60°
32°
24
63°
37°
25
64°
36°
26
67°
36°
27
71°
38°
28
72°
42°
29
73°
43°
30
73°
43°
1
74°
44°
2
75°
45°
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 60° to 75°, with overnight lows between 32° and 45°. The average high for April is 68° with an average low of 39°. 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.
