S
M
T
W
T
F
S
29
83°
56°
30
86°
68°
31
86°
69°
1
87°
73°
2
87°
74°
3
87°
74°
4
87°
63°
5
64°
55°
6
77°
57°
7
77°
54°
8
77°
62°
9
81°
68°
10
79°
67°
11
84°
73°
12
81°
73°
13
85°
73°
14
84°
73°
15
85°
72°
16
87°
73°
17
86°
72°
18
87°
66°
19
77°
64°
20
79°
69°
21
86°
71°
22
87°
72°
23
90°
72°
24
89°
76°
25
88°
70°
26
84°
69°
27
81°
70°
28
84°
70°
29
85°
71°
30
86°
70°
1
87°
71°
2
87°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in San Juan
San Juan's April 2026 forecast shows daily high temperatures ranging from 77° to 90°, with overnight lows between 64° and 76°. The average high for April is 85° with an average low of 71°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how April weather will actually feel in San Juan. See also: May | June | July.
