S
M
T
W
T
F
S
26
69°
55°
27
71°
52°
28
74°
51°
29
73°
52°
30
73°
58°
1
74°
58°
2
72°
57°
3
73°
59°
4
71°
57°
5
71°
55°
6
74°
53°
7
73°
55°
8
74°
60°
9
74°
61°
10
74°
61°
11
85°
56°
12
71°
58°
13
75°
59°
14
73°
58°
15
70°
61°
16
69°
61°
17
70°
62°
18
73°
61°
19
73°
59°
20
75°
62°
21
73°
63°
22
74°
63°
23
72°
61°
24
73°
62°
25
72°
62°
26
74°
61°
27
76°
63°
28
73°
59°
29
69°
56°
30
72°
57°
31
75°
60°
1
77°
61°
2
77°
63°
3
78°
63°
4
76°
58°
5
70°
58°
6
72°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Rossmoor
Rossmoor's May 2026 forecast shows daily high temperatures ranging from 69° to 78°, with overnight lows between 56° and 63°. The average high for May is 73° with an average low of 61°. 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 Rossmoor. See also: June | July | August.