S
M
T
W
T
F
S
26
68°
46°
27
67°
47°
28
68°
50°
29
70°
50°
30
68°
49°
1
65°
46°
2
65°
48°
3
66°
48°
4
67°
49°
5
68°
51°
6
68°
54°
7
70°
60°
8
67°
60°
9
70°
54°
10
67°
53°
11
62°
53°
12
60°
52°
13
65°
46°
14
64°
46°
15
64°
44°
16
64°
46°
17
65°
44°
18
65°
46°
19
65°
47°
20
63°
45°
21
65°
46°
22
65°
45°
23
64°
52°
24
66°
49°
25
62°
46°
26
N/A
27
63°
51°
28
65°
49°
29
62°
52°
30
65°
60°
31
67°
61°
1
66°
62°
2
67°
56°
3
68°
52°
4
67°
53°
5
66°
51°
6
65°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Onemana
Onemana's May 2026 forecast shows daily high temperatures ranging from 62° to 68°, with overnight lows between 48° and 62°. The average high for May is 66° with an average low of 54°. 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 Onemana. See also: June | July | August.