S
M
T
W
T
F
S
23
75°
43°
24
68°
44°
25
77°
53°
26
78°
50°
27
86°
46°
28
64°
46°
1
61°
47°
2
58°
44°
3
61°
38°
4
62°
41°
5
52°
43°
6
52°
39°
7
60°
37°
8
64°
39°
9
59°
40°
10
66°
40°
11
65°
50°
12
62°
46°
13
54°
41°
14
58°
41°
15
62°
38°
16
61°
38°
17
59°
46°
18
64°
38°
19
66°
40°
20
71°
38°
21
74°
50°
22
74°
50°
23
80°
53°
24
71°
57°
25
69°
52°
26
59°
52°
27
65°
48°
28
64°
48°
29
63°
39°
30
59°
48°
31
63°
49°
1
58°
44°
2
59°
41°
3
62°
40°
4
71°
41°
5
75°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
March Weather in Arroyo Grande
Arroyo Grande's March 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for March is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how March weather will actually feel in Arroyo Grande. See also: April | May | June.