S
M
T
W
T
F
S
26
54°
40°
27
66°
40°
28
64°
43°
29
62°
48°
30
58°
43°
1
56°
43°
2
55°
39°
3
58°
42°
4
64°
46°
5
65°
50°
6
64°
48°
7
61°
47°
8
62°
47°
9
61°
46°
10
62°
47°
11
63°
46°
12
63°
49°
13
64°
48°
14
64°
45°
15
63°
45°
16
61°
46°
17
61°
45°
18
63°
45°
19
69°
51°
20
68°
48°
21
65°
47°
22
65°
46°
23
67°
46°
24
66°
49°
25
73°
56°
26
72°
49°
27
66°
49°
28
67°
50°
29
70°
53°
30
76°
57°
31
77°
57°
1
76°
56°
2
78°
59°
3
79°
60°
4
79°
59°
5
78°
52°
6
71°
52°
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 55° to 79°, with overnight lows between 39° and 60°. The average high for May is 66° 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 Greenwich. See also: June | July | August.
