S
M
T
W
T
F
S
26
60°
41°
27
70°
41°
28
58°
51°
29
53°
40°
30
45°
37°
1
40°
32°
2
44°
26°
3
51°
42°
4
63°
54°
5
64°
48°
6
51°
38°
7
47°
33°
8
48°
35°
9
52°
39°
10
57°
40°
11
56°
40°
12
54°
41°
13
58°
44°
14
58°
45°
15
62°
42°
16
68°
48°
17
70°
49°
18
70°
47°
19
66°
44°
20
71°
48°
21
68°
48°
22
65°
40°
23
60°
40°
24
62°
41°
25
62°
42°
26
63°
42°
27
63°
41°
28
64°
41°
29
63°
42°
30
64°
43°
31
68°
49°
1
65°
46°
2
67°
45°
3
68°
52°
4
69°
50°
5
68°
50°
6
75°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Onoville
Onoville's May 2026 forecast shows daily high temperatures ranging from 44° to 75°, with overnight lows between 26° and 54°. The average high for May is 62° with an average low of 44°. 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 Onoville. See also: June | July | August.