S
M
T
W
T
F
S
26
58°
43°
27
65°
43°
28
64°
46°
29
57°
49°
30
62°
46°
1
58°
45°
2
56°
42°
3
56°
43°
4
59°
45°
5
65°
48°
6
63°
49°
7
64°
46°
8
60°
44°
9
61°
43°
10
61°
42°
11
62°
43°
12
61°
45°
13
60°
45°
14
60°
46°
15
61°
44°
16
61°
45°
17
62°
45°
18
62°
46°
19
63°
46°
20
62°
47°
21
64°
46°
22
65°
47°
23
66°
55°
24
72°
55°
25
70°
51°
26
66°
48°
27
66°
49°
28
68°
53°
29
67°
56°
30
67°
57°
31
68°
57°
1
69°
58°
2
71°
58°
3
69°
57°
4
73°
57°
5
76°
52°
6
72°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Ossining
Ossining's May 2026 forecast shows daily high temperatures ranging from 56° to 76°, with overnight lows between 42° and 58°. The average high for May is 64° with an average low of 48°. 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 Ossining. See also: June | July | August.