S
M
T
W
T
F
S
29
64°
24°
30
71°
52°
31
84°
59°
1
88°
60°
2
67°
52°
3
83°
58°
4
91°
67°
5
73°
42°
6
62°
42°
7
54°
29°
8
58°
40°
9
73°
48°
10
79°
53°
11
78°
56°
12
81°
56°
13
78°
52°
14
76°
53°
15
74°
50°
16
69°
44°
17
61°
39°
18
60°
42°
19
64°
47°
20
70°
50°
21
73°
52°
22
74°
52°
23
72°
51°
24
73°
52°
25
75°
53°
26
75°
52°
27
73°
47°
28
63°
43°
29
66°
51°
30
74°
52°
1
66°
47°
2
65°
46°
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 54° to 91°, with overnight lows between 29° and 67°. The average high for April is 71° with an average low of 49°. 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.
