S
M
T
W
T
F
S
29
93°
56°
30
84°
53°
31
72°
59°
1
73°
54°
2
70°
55°
3
81°
50°
4
88°
48°
5
90°
52°
6
82°
60°
7
82°
53°
8
84°
55°
9
79°
57°
10
79°
58°
11
73°
57°
12
66°
50°
13
64°
48°
14
74°
49°
15
76°
53°
16
75°
52°
17
78°
47°
18
83°
50°
19
83°
52°
20
69°
53°
21
73°
53°
22
75°
53°
23
72°
52°
24
74°
53°
25
68°
47°
26
72°
46°
27
73°
46°
28
75°
50°
29
77°
53°
30
72°
49°
1
71°
47°
2
71°
47°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in San Bernardino
San Bernardino's April 2026 forecast shows daily high temperatures ranging from 64° to 83°, with overnight lows between 46° and 53°. The average high for April is 73° with an average low of 50°. 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 Bernardino. See also: May | June | July.
