S
M
T
W
T
F
S
1
86°
73°
2
86°
74°
3
86°
76°
4
84°
74°
5
85°
75°
6
85°
74°
7
84°
72°
8
85°
73°
9
85°
71°
10
84°
73°
11
84°
71°
12
84°
71°
13
84°
71°
14
83°
73°
15
84°
73°
16
87°
74°
17
86°
74°
18
86°
73°
19
86°
73°
20
88°
72°
21
89°
75°
22
84°
72°
23
80°
73°
24
85°
74°
25
82°
73°
26
84°
73°
27
84°
70°
28
83°
70°
29
86°
73°
30
83°
74°
31
84°
74°
1
84°
74°
2
85°
74°
3
84°
73°
4
84°
73°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
March Weather in San Juan
San Juan'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 San Juan. See also: April | May | June.
