S
M
T
W
T
F
S
29
88°
76°
30
88°
78°
31
87°
79°
1
87°
78°
2
88°
78°
3
88°
78°
4
90°
79°
5
90°
79°
6
90°
80°
7
90°
81°
8
89°
80°
9
89°
79°
10
88°
80°
11
89°
78°
12
89°
78°
13
89°
78°
14
89°
79°
15
N/A
16
87°
81°
17
87°
80°
18
87°
80°
19
86°
80°
20
87°
80°
21
88°
81°
22
83°
82°
23
83°
82°
24
84°
82°
25
84°
82°
26
86°
83°
27
85°
84°
28
84°
81°
29
83°
81°
30
81°
80°
1
81°
81°
2
82°
81°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
April Weather in San Joaquin
San Joaquin's April 2026 forecast shows daily high temperatures ranging from 81° to 88°, with overnight lows between 80° and 84°. The average high for April is 85° with an average low of 81°. 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 Joaquin. See also: May | June | July.