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
N/A
8
59°
47°
9
52°
42°
10
51°
44°
11
52°
42°
12
52°
41°
13
52°
43°
14
56°
46°
15
57°
44°
16
55°
44°
17
56°
42°
18
57°
42°
19
60°
43°
20
54°
44°
21
57°
44°
22
58°
43°
23
59°
44°
24
59°
45°
25
56°
44°
26
55°
42°
27
53°
39°
28
53°
39°
29
54°
40°
30
54°
45°
1
57°
46°
2
56°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
April Weather in Waterloo
Waterloo's April 2026 forecast shows daily high temperatures ranging from 51° to 60°, 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.
