S
M
T
W
T
F
S
26
60°
53°
27
60°
48°
28
60°
48°
29
61°
48°
30
61°
43°
1
60°
54°
2
58°
54°
3
61°
54°
4
62°
52°
5
62°
60°
6
62°
53°
7
59°
54°
8
60°
54°
9
58°
54°
10
59°
52°
11
60°
52°
12
57°
50°
13
60°
55°
14
61°
46°
15
68°
51°
16
62°
51°
17
66°
61°
18
74°
54°
19
73°
54°
20
71°
50°
21
66°
50°
22
58°
52°
23
61°
49°
24
61°
50°
25
62°
49°
26
62°
50°
27
64°
49°
28
63°
48°
29
58°
46°
30
59°
46°
31
62°
49°
1
63°
49°
2
66°
53°
3
66°
50°
4
59°
48°
5
61°
49°
6
64°
48°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in San Gregorio
San Gregorio's May 2026 forecast shows daily high temperatures ranging from 58° to 74°, with overnight lows between 46° and 61°. The average high for May is 64° with an average low of 50°. 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 San Gregorio. See also: June | July | August.
