S
M
T
W
T
F
S
29
91°
59°
30
82°
59°
31
70°
60°
1
73°
58°
2
71°
56°
3
82°
50°
4
89°
63°
5
88°
54°
6
82°
59°
7
82°
56°
8
83°
59°
9
79°
59°
10
78°
57°
11
74°
56°
12
65°
51°
13
66°
49°
14
75°
49°
15
78°
53°
16
74°
55°
17
80°
53°
18
86°
54°
19
83°
59°
20
80°
55°
21
70°
53°
22
72°
53°
23
79°
51°
24
77°
55°
25
70°
54°
26
67°
52°
27
67°
53°
28
77°
49°
29
79°
52°
30
76°
54°
1
83°
57°
2
79°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Rancho Cucamonga
Rancho Cucamonga's April 2026 forecast shows daily high temperatures ranging from 76° to 83°, with overnight lows between 54° and 57°. The average high for April is 79° with an average low of 55°. 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 Rancho Cucamonga. See also: May | June | July.
