S
M
T
W
T
F
S
26
54°
40°
27
66°
40°
28
64°
41°
29
62°
45°
30
59°
42°
1
64°
47°
2
57°
45°
3
58°
45°
4
62°
54°
5
70°
54°
6
68°
50°
7
62°
45°
8
63°
44°
9
63°
45°
10
62°
46°
11
64°
48°
12
65°
47°
13
66°
48°
14
64°
45°
15
64°
51°
16
65°
50°
17
65°
48°
18
66°
54°
19
73°
55°
20
71°
55°
21
67°
54°
22
74°
51°
23
66°
51°
24
69°
52°
25
68°
49°
26
68°
52°
27
66°
54°
28
68°
58°
29
75°
57°
30
74°
56°
31
74°
55°
1
70°
51°
2
68°
51°
3
67°
52°
4
70°
51°
5
69°
52°
6
70°
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 57° to 75°, with overnight lows between 42° and 58°. 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.
