S
M
T
W
T
F
S
29
61°
33°
30
39°
28°
31
45°
28°
1
51°
34°
2
42°
32°
3
53°
29°
4
63°
26°
5
68°
35°
6
69°
38°
7
69°
34°
8
53°
27°
9
47°
28°
10
50°
29°
11
56°
27°
12
61°
31°
13
64°
35°
14
67°
36°
15
60°
29°
16
61°
32°
17
63°
34°
18
64°
35°
19
64°
34°
20
61°
32°
21
53°
27°
22
52°
25°
23
52°
26°
24
53°
28°
25
52°
26°
26
54°
31°
27
54°
30°
28
55°
26°
29
61°
33°
30
64°
32°
1
66°
37°
2
67°
36°
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 42° to 69°, with overnight lows between 25° and 38°. The average high for April is 59° with an average low of 31°. 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.
