S
M
T
W
T
F
S
29
71°
56°
30
69°
57°
31
67°
64°
1
68°
57°
2
65°
54°
3
69°
54°
4
79°
54°
5
72°
54°
6
72°
60°
7
66°
57°
8
70°
56°
9
68°
59°
10
69°
62°
11
69°
58°
12
66°
52°
13
67°
52°
14
69°
53°
15
67°
57°
16
69°
60°
17
75°
49°
18
78°
50°
19
77°
52°
20
70°
55°
21
69°
53°
22
71°
54°
23
68°
56°
24
69°
56°
25
71°
51°
26
66°
48°
27
66°
48°
28
68°
53°
29
69°
55°
30
66°
52°
1
66°
49°
2
65°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in San Onofre
San Onofre's April 2026 forecast shows daily high temperatures ranging from 65° to 78°, with overnight lows between 48° and 60°. The average high for April is 69° with an average low of 53°. 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 Onofre. See also: May | June | July.
