S
M
T
W
T
F
S
29
50°
22°
30
70°
38°
31
78°
53°
1
75°
46°
2
46°
36°
3
64°
36°
4
68°
40°
5
53°
39°
6
47°
36°
7
49°
28°
8
50°
21°
9
57°
32°
10
65°
43°
11
57°
36°
12
58°
45°
13
73°
55°
14
80°
53°
15
83°
50°
16
68°
47°
17
69°
44°
18
68°
41°
19
61°
41°
20
64°
43°
21
65°
42°
22
62°
37°
23
56°
33°
24
57°
40°
25
57°
40°
26
56°
38°
27
57°
38°
28
58°
37°
29
58°
37°
30
59°
35°
1
59°
43°
2
68°
43°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Harwinton
Harwinton's April 2026 forecast shows daily high temperatures ranging from 56° to 83°, with overnight lows between 32° and 55°. The average high for April is 63° with an average low of 41°. 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 Harwinton. See also: May | June | July.