S
M
T
W
T
F
S
29
55°
27°
30
70°
41°
31
72°
53°
1
42°
36°
2
56°
52°
3
79°
39°
4
74°
49°
5
54°
33°
6
43°
29°
7
39°
26°
8
48°
37°
9
62°
41°
10
63°
46°
11
63°
42°
12
55°
42°
13
60°
44°
14
61°
35°
15
59°
35°
16
51°
29°
17
47°
30°
18
48°
31°
19
51°
36°
20
61°
44°
21
63°
45°
22
63°
45°
23
64°
44°
24
65°
46°
25
66°
46°
26
65°
44°
27
57°
40°
28
53°
39°
29
54°
42°
30
55°
44°
1
56°
40°
2
57°
37°
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 39° to 79°, with overnight lows between 26° and 52°. The average high for April is 57° with an average low of 40°. 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.
