S
M
T
W
T
F
S
26
66°
40°
27
69°
47°
28
64°
37°
29
65°
33°
30
55°
45°
1
66°
43°
2
73°
37°
3
86°
41°
4
86°
39°
5
58°
40°
6
47°
35°
7
77°
33°
8
77°
43°
9
89°
50°
10
69°
48°
11
81°
40°
12
87°
50°
13
84°
46°
14
96°
58°
15
91°
52°
16
96°
57°
17
89°
64°
18
76°
47°
19
67°
40°
20
69°
42°
21
68°
51°
22
72°
51°
23
76°
53°
24
87°
58°
25
88°
57°
26
84°
57°
27
75°
59°
28
80°
58°
29
83°
59°
30
81°
57°
31
82°
57°
1
83°
59°
2
83°
59°
3
84°
60°
4
89°
60°
5
87°
58°
6
90°
63°
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 75° to 90°, with overnight lows between 53° and 63°. The average high for May is 83° with an average low of 58°. 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.