S
M
T
W
T
F
S
26
56°
44°
27
60°
45°
28
71°
40°
29
76°
46°
30
79°
51°
1
83°
55°
2
85°
54°
3
78°
44°
4
63°
48°
5
61°
42°
6
81°
51°
7
90°
58°
8
85°
58°
9
82°
55°
10
86°
58°
11
83°
56°
12
86°
54°
13
87°
55°
14
81°
50°
15
75°
46°
16
76°
48°
17
77°
47°
18
77°
47°
19
78°
48°
20
77°
50°
21
84°
55°
22
86°
56°
23
87°
57°
24
86°
57°
25
87°
56°
26
87°
58°
27
88°
56°
28
87°
53°
29
88°
53°
30
85°
51°
31
82°
51°
1
83°
53°
2
85°
56°
3
89°
57°
4
90°
58°
5
89°
58°
6
87°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Onyx
Onyx's May 2026 forecast shows daily high temperatures ranging from 61° to 90°, with overnight lows between 42° and 58°. The average high for May is 83° with an average low of 53°. 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 Onyx. See also: June | July | August.
