S
M
T
W
T
F
S
29
88°
55°
30
85°
55°
31
66°
58°
1
67°
54°
2
69°
49°
3
76°
46°
4
75°
46°
5
88°
49°
6
80°
53°
7
79°
51°
8
80°
49°
9
80°
56°
10
65°
56°
11
59°
55°
12
61°
51°
13
67°
52°
14
73°
45°
15
69°
45°
16
74°
50°
17
75°
47°
18
76°
44°
19
85°
53°
20
81°
46°
21
68°
54°
22
62°
61°
23
75°
49°
24
73°
47°
25
64°
52°
26
66°
47°
27
71°
48°
28
72°
49°
29
73°
47°
30
78°
49°
1
79°
52°
2
80°
51°
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 64° to 80°, with overnight lows between 47° and 52°. The average high for April is 73° 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.
