S
M
T
W
T
F
S
1
68°
49°
2
68°
49°
3
77°
46°
4
73°
48°
5
69°
46°
6
72°
42°
7
72°
50°
8
84°
46°
9
64°
41°
10
63°
48°
11
82°
48°
12
87°
52°
13
84°
53°
14
82°
53°
15
86°
53°
16
78°
56°
17
90°
54°
18
86°
55°
19
84°
56°
20
82°
57°
21
78°
52°
22
72°
53°
23
91°
52°
24
81°
52°
25
78°
50°
26
82°
51°
27
69°
55°
28
64°
52°
29
74°
48°
30
66°
48°
31
68°
54°
1
67°
51°
2
66°
51°
3
74°
52°
4
81°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
March Weather in Arroyo Grande
Arroyo Grande's March 2026 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.
