S
M
T
W
T
F
S
29
53°
24°
30
72°
38°
31
62°
39°
1
74°
40°
2
42°
36°
3
70°
37°
4
60°
38°
5
55°
38°
6
50°
28°
7
46°
25°
8
47°
26°
9
56°
34°
10
66°
47°
11
61°
36°
12
58°
44°
13
67°
60°
14
79°
60°
15
71°
49°
16
64°
51°
17
62°
40°
18
58°
46°
19
62°
43°
20
61°
48°
21
64°
40°
22
60°
42°
23
56°
40°
24
58°
45°
25
58°
44°
26
57°
43°
27
56°
43°
28
58°
42°
29
57°
41°
30
58°
40°
1
59°
48°
2
67°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Watertown
Watertown's April 2026 forecast shows daily high temperatures ranging from 56° to 79°, with overnight lows between 34° and 60°. The average high for April is 61° with an average low of 45°. 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 Watertown. See also: May | June | July.
