S
M
T
W
T
F
S
26
56°
33°
27
57°
34°
28
58°
34°
29
58°
35°
30
57°
35°
1
59°
38°
2
60°
37°
3
59°
36°
4
63°
43°
5
69°
41°
6
63°
37°
7
61°
40°
8
70°
47°
9
72°
48°
10
73°
42°
11
62°
39°
12
62°
39°
13
63°
45°
14
63°
44°
15
62°
46°
16
63°
49°
17
65°
49°
18
71°
42°
19
69°
43°
20
69°
44°
21
68°
43°
22
66°
42°
23
67°
41°
24
66°
41°
25
69°
44°
26
71°
46°
27
72°
44°
28
69°
43°
29
70°
50°
30
69°
48°
31
70°
46°
1
70°
54°
2
72°
50°
3
71°
47°
4
71°
55°
5
79°
54°
6
78°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Greenfield
Greenfield's May 2026 forecast shows daily high temperatures ranging from 56° to 79°, with overnight lows between 33° and 55°. The average high for May is 66° with an average low of 43°. 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 Greenfield. See also: June | July | August.