S
M
T
W
T
F
S
29
86°
73°
30
83°
74°
31
84°
74°
1
84°
74°
2
85°
74°
3
84°
73°
4
84°
73°
5
85°
74°
6
89°
73°
7
90°
75°
8
90°
76°
9
89°
77°
10
88°
76°
11
90°
75°
12
86°
76°
13
84°
72°
14
84°
72°
15
90°
73°
16
85°
75°
17
83°
74°
18
84°
75°
19
83°
75°
20
83°
74°
21
85°
75°
22
83°
74°
23
82°
73°
24
84°
73°
25
85°
72°
26
83°
73°
27
86°
77°
28
85°
76°
29
86°
77°
30
84°
74°
1
84°
75°
2
85°
75°
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 82° to 86°, with overnight lows between 72° and 77°. The average high for April is 84° with an average low of 75°. 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.
