S
M
T
W
T
F
S
26
58°
42°
27
57°
41°
28
60°
41°
29
59°
40°
30
58°
40°
1
60°
43°
2
61°
42°
3
60°
41°
4
61°
46°
5
69°
50°
6
70°
44°
7
63°
45°
8
71°
52°
9
73°
53°
10
73°
49°
11
64°
45°
12
62°
44°
13
64°
47°
14
63°
48°
15
63°
50°
16
64°
50°
17
65°
53°
18
75°
46°
19
67°
48°
20
71°
48°
21
68°
47°
22
67°
46°
23
66°
47°
24
67°
46°
25
69°
49°
26
69°
51°
27
70°
50°
28
70°
49°
29
71°
58°
30
70°
51°
31
75°
51°
1
71°
57°
2
72°
54°
3
74°
52°
4
74°
57°
5
78°
53°
6
76°
54°
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 57° to 78°, with overnight lows between 40° and 58°. 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.
