S
M
T
W
T
F
S
26
56°
44°
27
60°
45°
28
71°
40°
29
76°
46°
30
79°
51°
1
84°
55°
2
86°
57°
3
77°
54°
4
61°
46°
5
61°
44°
6
80°
48°
7
88°
52°
8
86°
52°
9
91°
57°
10
98°
58°
11
99°
61°
12
95°
59°
13
96°
60°
14
98°
59°
15
95°
58°
16
91°
59°
17
82°
51°
18
87°
56°
19
86°
55°
20
87°
57°
21
87°
57°
22
86°
56°
23
88°
57°
24
89°
58°
25
89°
58°
26
88°
57°
27
88°
58°
28
85°
54°
29
80°
55°
30
82°
54°
31
81°
56°
1
81°
57°
2
86°
58°
3
88°
59°
4
88°
59°
5
90°
58°
6
90°
55°
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 99°, with overnight lows between 44° and 61°. The average high for May is 87° with an average low of 56°. 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.
