S
M
T
W
T
F
S
26
67°
50°
27
66°
51°
28
69°
52°
29
70°
51°
30
72°
50°
1
71°
48°
2
70°
49°
3
72°
51°
4
72°
51°
5
67°
48°
6
66°
50°
7
66°
50°
8
67°
51°
9
68°
46°
10
67°
48°
11
68°
48°
12
70°
50°
13
73°
52°
14
67°
49°
15
68°
47°
16
67°
50°
17
69°
49°
18
73°
51°
19
70°
50°
20
74°
53°
21
74°
53°
22
69°
52°
23
68°
52°
24
74°
53°
25
73°
52°
26
68°
53°
27
67°
53°
28
67°
52°
29
69°
53°
30
72°
54°
31
73°
54°
1
68°
53°
2
70°
53°
3
74°
51°
4
73°
52°
5
71°
51°
6
69°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Arroyo Grande
Arroyo Grande's May 2026 forecast shows daily high temperatures ranging from 66° to 74°, with overnight lows between 46° and 54°. The average high for May is 70° with an average low of 51°. 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 Arroyo Grande. See also: June | July | August.
