S
M
T
W
T
F
S
29
44°
27°
30
54°
30°
31
46°
35°
1
42°
29°
2
43°
29°
3
69°
39°
4
45°
41°
5
51°
31°
6
39°
22°
7
32°
19°
8
39°
33°
9
57°
40°
10
49°
37°
11
60°
41°
12
58°
37°
13
54°
42°
14
54°
39°
15
53°
35°
16
56°
38°
17
53°
32°
18
56°
35°
19
55°
39°
20
59°
39°
21
58°
38°
22
50°
40°
23
58°
41°
24
60°
36°
25
52°
34°
26
50°
30°
27
51°
30°
28
55°
32°
29
51°
33°
30
51°
34°
1
52°
33°
2
52°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Fallbrook
Fallbrook's April 2026 forecast shows daily high temperatures ranging from 32° to 60°, with overnight lows between 19° and 42°. The average high for April is 52° with an average low of 35°. 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 Fallbrook. See also: May | June | July.
