S
M
T
W
T
F
S
26
56°
41°
27
58°
43°
28
57°
44°
29
58°
43°
30
62°
46°
1
63°
48°
2
62°
48°
3
64°
46°
4
64°
49°
5
66°
47°
6
61°
46°
7
61°
46°
8
65°
44°
9
62°
45°
10
62°
52°
11
70°
48°
12
62°
44°
13
64°
52°
14
72°
53°
15
66°
48°
16
65°
47°
17
66°
51°
18
71°
55°
19
74°
50°
20
73°
47°
21
64°
46°
22
66°
50°
23
67°
48°
24
71°
55°
25
75°
57°
26
76°
54°
27
67°
53°
28
68°
56°
29
69°
54°
30
70°
54°
31
69°
57°
1
76°
58°
2
76°
58°
3
78°
58°
4
77°
59°
5
78°
57°
6
79°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Greenwich
Greenwich's May 2026 forecast shows daily high temperatures ranging from 56° to 79°, with overnight lows between 41° and 59°. The average high for May is 67° with an average low of 50°. 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 Greenwich. See also: June | July | August.
