S
M
T
W
T
F
S
29
71°
28°
30
76°
58°
31
84°
58°
1
85°
54°
2
85°
54°
3
84°
59°
4
86°
54°
5
67°
41°
6
65°
34°
7
53°
29°
8
70°
42°
9
78°
46°
10
78°
52°
11
70°
46°
12
84°
55°
13
81°
56°
14
81°
57°
15
77°
49°
16
72°
47°
17
73°
53°
18
72°
50°
19
74°
48°
20
77°
39°
21
74°
48°
22
75°
49°
23
76°
47°
24
73°
44°
25
67°
39°
26
64°
45°
27
66°
40°
28
65°
42°
29
65°
38°
30
64°
38°
1
68°
42°
2
66°
40°
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 53° to 84°, with overnight lows between 29° and 57°. The average high for April is 72° 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.
