S
M
T
W
T
F
S
29
54°
41°
30
52°
45°
31
57°
48°
1
55°
43°
2
52°
41°
3
59°
43°
4
55°
41°
5
50°
37°
6
57°
37°
7
64°
43°
8
68°
47°
9
53°
42°
10
52°
45°
11
53°
43°
12
53°
42°
13
52°
42°
14
55°
43°
15
57°
44°
16
55°
44°
17
56°
46°
18
56°
45°
19
58°
46°
20
57°
45°
21
57°
44°
22
53°
42°
23
52°
40°
24
52°
39°
25
53°
39°
26
52°
40°
27
53°
40°
28
54°
44°
29
58°
45°
30
59°
46°
1
58°
46°
2
57°
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 52° to 68°, with overnight lows between 39° and 47°. The average high for April is 55° with an average low of 43°. 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.
