S
M
T
W
T
F
S
29
53°
27°
30
73°
47°
31
81°
62°
1
82°
47°
2
46°
40°
3
53°
51°
4
60°
45°
5
65°
42°
6
56°
43°
7
50°
34°
8
45°
39°
9
60°
48°
10
70°
51°
11
67°
50°
12
65°
52°
13
65°
49°
14
63°
50°
15
65°
49°
16
59°
41°
17
53°
36°
18
53°
37°
19
54°
40°
20
60°
47°
21
64°
48°
22
66°
47°
23
56°
47°
24
58°
49°
25
67°
49°
26
67°
48°
27
58°
46°
28
59°
42°
29
58°
46°
30
65°
50°
1
62°
47°
2
59°
43°
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 45° to 70°, with overnight lows between 34° and 52°. The average high for April is 60° with an average low of 46°. 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.
