S
M
T
W
T
F
S
26
85°
61°
27
86°
61°
28
76°
67°
29
81°
65°
30
73°
60°
1
65°
57°
2
72°
48°
3
74°
44°
4
81°
46°
5
79°
53°
6
80°
67°
7
74°
59°
8
68°
54°
9
77°
60°
10
81°
59°
11
80°
63°
12
80°
59°
13
82°
54°
14
80°
51°
15
83°
60°
16
87°
61°
17
91°
62°
18
89°
66°
19
88°
67°
20
87°
68°
21
85°
66°
22
89°
68°
23
88°
68°
24
88°
69°
25
91°
75°
26
89°
69°
27
88°
68°
28
89°
69°
29
90°
70°
30
89°
70°
31
88°
69°
1
89°
70°
2
91°
71°
3
91°
70°
4
88°
71°
5
85°
71°
6
87°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Deerfield
Deerfield's May 2026 forecast shows daily high temperatures ranging from 80° to 91°, with overnight lows between 51° and 75°. The average high for May is 87° with an average low of 67°. 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 Deerfield. See also: June | July | August.