S
M
T
W
T
F
S
26
65°
47°
27
58°
44°
28
59°
40°
29
59°
43°
30
66°
48°
1
63°
45°
2
61°
41°
3
61°
43°
4
62°
43°
5
65°
49°
6
70°
51°
7
71°
47°
8
64°
48°
9
63°
51°
10
63°
52°
11
72°
53°
12
73°
54°
13
73°
55°
14
72°
54°
15
67°
47°
16
67°
46°
17
69°
48°
18
68°
50°
19
71°
46°
20
67°
47°
21
68°
54°
22
72°
55°
23
73°
56°
24
73°
52°
25
72°
51°
26
68°
51°
27
73°
50°
28
71°
50°
29
72°
51°
30
75°
49°
31
73°
50°
1
72°
58°
2
74°
58°
3
77°
55°
4
77°
56°
5
79°
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 58° to 79°, with overnight lows between 40° and 60°. The average high for May is 69° 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.
