S
M
T
W
T
F
S
26
60°
43°
27
73°
42°
28
69°
51°
29
54°
45°
30
54°
40°
1
45°
36°
2
42°
33°
3
59°
31°
4
70°
57°
5
65°
46°
6
55°
40°
7
53°
39°
8
62°
45°
9
59°
44°
10
61°
47°
11
59°
44°
12
60°
45°
13
63°
51°
14
62°
46°
15
62°
48°
16
67°
51°
17
71°
49°
18
71°
54°
19
70°
54°
20
74°
53°
21
73°
50°
22
66°
45°
23
64°
46°
24
66°
46°
25
66°
49°
26
67°
48°
27
67°
47°
28
68°
48°
29
69°
48°
30
68°
52°
31
74°
55°
1
69°
53°
2
70°
52°
3
74°
58°
4
75°
57°
5
75°
59°
6
79°
60°
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 53° to 79°, with overnight lows between 39° and 60°. 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.
