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
53°
35°
5
49°
30°
6
41°
20°
7
32°
22°
8
42°
29°
9
57°
43°
10
55°
33°
11
54°
34°
12
57°
43°
13
56°
42°
14
54°
37°
15
50°
39°
16
56°
38°
17
53°
37°
18
56°
32°
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 20° and 43°. 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.
