S
M
T
W
T
F
S
29
69°
27°
30
74°
54°
31
83°
63°
1
81°
63°
2
82°
55°
3
78°
62°
4
85°
58°
5
58°
35°
6
64°
35°
7
50°
26°
8
67°
41°
9
75°
48°
10
80°
50°
11
80°
51°
12
86°
59°
13
81°
59°
14
78°
56°
15
76°
55°
16
75°
53°
17
70°
48°
18
71°
41°
19
72°
50°
20
73°
50°
21
75°
51°
22
76°
52°
23
76°
50°
24
73°
47°
25
67°
42°
26
64°
48°
27
66°
43°
28
65°
45°
29
65°
41°
30
66°
41°
1
69°
45°
2
67°
41°
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 50° to 86°, with overnight lows between 26° and 59°. The average high for April is 71° with an average low of 47°. 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.
