S
M
T
W
T
F
S
26
62°
31°
27
66°
35°
28
59°
47°
29
47°
34°
30
49°
34°
1
47°
31°
2
46°
27°
3
54°
24°
4
74°
43°
5
63°
41°
6
45°
34°
7
47°
32°
8
51°
37°
9
59°
42°
10
52°
36°
11
48°
35°
12
52°
39°
13
51°
39°
14
59°
44°
15
61°
45°
16
60°
43°
17
59°
44°
18
58°
46°
19
63°
45°
20
58°
40°
21
59°
41°
22
59°
41°
23
60°
43°
24
62°
44°
25
66°
47°
26
67°
46°
27
61°
44°
28
67°
47°
29
65°
48°
30
71°
51°
31
72°
53°
1
73°
50°
2
68°
50°
3
71°
52°
4
73°
54°
5
74°
56°
6
72°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in De Grassi Point
De Grassi Point's May 2026 forecast shows daily high temperatures ranging from 45° to 74°, with overnight lows between 32° and 56°. The average high for May is 61° 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 De Grassi Point. See also: June | July | August.