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
85°
49°
5
60°
37°
6
64°
34°
7
51°
27°
8
70°
42°
9
78°
45°
10
84°
48°
11
84°
49°
12
87°
57°
13
82°
56°
14
75°
50°
15
73°
46°
16
74°
47°
17
71°
38°
18
73°
46°
19
72°
47°
20
73°
46°
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 51° to 87°, with overnight lows between 27° and 57°. The average high for April is 72° with an average low of 44°. 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.
