S
M
T
W
T
F
S
26
66°
36°
27
70°
39°
28
59°
43°
29
66°
41°
30
N/A
1
73°
42°
2
69°
53°
3
63°
48°
4
62°
44°
5
61°
41°
6
56°
39°
7
60°
41°
8
61°
43°
9
62°
44°
10
62°
45°
11
61°
45°
12
61°
43°
13
60°
45°
14
58°
41°
15
61°
48°
16
61°
48°
17
62°
47°
18
63°
48°
19
61°
47°
20
59°
46°
21
60°
46°
22
60°
44°
23
61°
45°
24
61°
45°
25
59°
43°
26
59°
44°
27
63°
49°
28
62°
50°
29
66°
50°
30
64°
45°
31
60°
44°
1
59°
44°
2
59°
45°
3
60°
45°
4
60°
46°
5
61°
45°
6
61°
46°
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 73°, with overnight lows between 39° and 53°. The average high for May is 61° with an average low of 45°. 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.