S
M
T
W
T
F
S
26
64°
43°
27
58°
40°
28
59°
45°
29
63°
42°
30
66°
41°
1
60°
41°
2
60°
40°
3
58°
42°
4
59°
44°
5
60°
43°
6
59°
42°
7
61°
43°
8
64°
46°
9
62°
44°
10
61°
43°
11
61°
43°
12
63°
44°
13
69°
54°
14
72°
50°
15
64°
50°
16
71°
53°
17
70°
50°
18
68°
47°
19
66°
47°
20
70°
54°
21
74°
51°
22
69°
47°
23
67°
48°
24
68°
49°
25
69°
51°
26
75°
56°
27
76°
54°
28
78°
51°
29
71°
51°
30
72°
56°
31
70°
54°
1
71°
52°
2
72°
51°
3
72°
50°
4
71°
52°
5
72°
54°
6
76°
59°
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 58° to 78°, with overnight lows between 40° and 59°. The average high for May is 67° with an average low of 48°. 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.
