S
M
T
W
T
F
S
29
61°
31°
30
75°
52°
31
73°
55°
1
53°
36°
2
73°
36°
3
69°
55°
4
69°
43°
5
46°
34°
6
50°
34°
7
41°
24°
8
64°
27°
9
71°
52°
10
62°
41°
11
58°
36°
12
80°
44°
13
82°
60°
14
81°
63°
15
73°
62°
16
72°
55°
17
80°
48°
18
73°
41°
19
N/A
20
51°
36°
21
73°
53°
22
74°
51°
23
77°
54°
24
74°
52°
25
64°
46°
26
63°
43°
27
65°
45°
28
61°
44°
29
59°
42°
30
61°
43°
1
62°
44°
2
61°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
April Weather in Waterloo
Waterloo's April 2026 forecast shows daily high temperatures ranging from 51° to 77°, with overnight lows between 36° and 54°. The average high for April is 65° 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.
