S
M
T
W
T
F
S
29
90°
52°
30
81°
50°
31
70°
55°
1
63°
54°
2
66°
46°
3
76°
44°
4
81°
45°
5
83°
52°
6
83°
48°
7
77°
53°
8
73°
53°
9
72°
52°
10
72°
51°
11
73°
49°
12
72°
51°
13
75°
52°
14
76°
53°
15
77°
52°
16
72°
47°
17
74°
51°
18
72°
51°
19
68°
50°
20
68°
44°
21
67°
44°
22
67°
45°
23
69°
44°
24
70°
46°
25
73°
46°
26
72°
49°
27
77°
51°
28
79°
52°
29
78°
51°
30
79°
52°
1
80°
53°
2
79°
52°
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 67° to 83°, with overnight lows between 44° and 53°. The average high for April is 74° with an average low of 49°. 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.
