S
M
T
W
T
F
S
29
70°
33°
30
73°
56°
31
81°
53°
1
82°
63°
2
86°
57°
3
83°
54°
4
82°
58°
5
66°
51°
6
66°
42°
7
67°
41°
8
72°
45°
9
74°
46°
10
77°
45°
11
82°
47°
12
85°
52°
13
81°
62°
14
84°
58°
15
84°
57°
16
85°
61°
17
84°
59°
18
85°
56°
19
63°
46°
20
72°
41°
21
76°
42°
22
80°
50°
23
82°
51°
24
81°
57°
25
70°
58°
26
79°
56°
27
82°
59°
28
77°
61°
29
77°
56°
30
73°
52°
1
68°
46°
2
66°
40°
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 66° to 82°, with overnight lows between 40° and 61°. The average high for April is 75° with an average low of 54°. 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.
