S
M
T
W
T
F
S
26
73°
61°
27
77°
60°
28
72°
60°
29
73°
59°
30
71°
57°
1
71°
61°
2
72°
59°
3
71°
55°
4
72°
57°
5
73°
60°
6
75°
62°
7
77°
62°
8
76°
63°
9
76°
62°
10
78°
63°
11
80°
63°
12
78°
64°
13
79°
64°
14
79°
62°
15
74°
59°
16
74°
62°
17
75°
61°
18
79°
63°
19
81°
62°
20
78°
60°
21
77°
59°
22
76°
60°
23
77°
63°
24
76°
61°
25
77°
65°
26
78°
62°
27
79°
62°
28
84°
61°
29
78°
67°
30
81°
68°
31
84°
65°
1
83°
68°
2
84°
68°
3
85°
66°
4
85°
68°
5
80°
68°
6
83°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Supply
Supply's May 2026 forecast shows daily high temperatures ranging from 71° to 85°, with overnight lows between 55° and 68°. The average high for May is 77° with an average low of 62°. 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 Supply. See also: June | July | August.