S
M
T
W
T
F
S
29
76°
47°
30
89°
46°
31
74°
45°
1
48°
35°
2
47°
39°
3
41°
37°
4
49°
35°
5
64°
35°
6
42°
29°
7
43°
40°
8
68°
37°
9
57°
38°
10
60°
46°
11
71°
59°
12
74°
58°
13
76°
45°
14
53°
33°
15
62°
42°
16
58°
40°
17
63°
45°
18
64°
41°
19
68°
46°
20
67°
48°
21
69°
48°
22
68°
44°
23
57°
42°
24
59°
38°
25
62°
50°
26
70°
50°
27
70°
49°
28
71°
50°
29
69°
50°
30
65°
47°
1
68°
50°
2
68°
48°
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 76°, with overnight lows between 29° and 59°. The average high for April is 64° with an average low of 45°. 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.
