S
M
T
W
T
F
S
26
61°
41°
27
66°
43°
28
57°
45°
29
59°
46°
30
63°
48°
1
70°
50°
2
67°
54°
3
63°
50°
4
58°
45°
5
56°
46°
6
53°
43°
7
55°
44°
8
57°
47°
9
57°
49°
10
55°
47°
11
56°
48°
12
58°
48°
13
58°
47°
14
57°
48°
15
61°
50°
16
58°
50°
17
59°
47°
18
58°
46°
19
58°
48°
20
59°
45°
21
57°
44°
22
58°
46°
23
59°
47°
24
61°
51°
25
61°
51°
26
63°
52°
27
64°
50°
28
61°
48°
29
60°
46°
30
60°
49°
31
65°
51°
1
66°
51°
2
65°
52°
3
66°
50°
4
61°
53°
5
63°
53°
6
66°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Harwich
Harwich's May 2026 forecast shows daily high temperatures ranging from 53° to 67°, with overnight lows between 43° and 54°. The average high for May is 60° with an average low of 49°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Harwich. See also: June | July | August.
