S
M
T
W
T
F
S
29
77°
39°
30
64°
43°
31
55°
46°
1
50°
42°
2
55°
36°
3
73°
30°
4
77°
34°
5
77°
39°
6
77°
39°
7
77°
41°
8
75°
43°
9
66°
46°
10
59°
46°
11
52°
39°
12
46°
36°
13
59°
39°
14
64°
41°
15
34°
15°
16
32°
20°
17
41°
26°
18
42°
31°
19
36°
27°
20
46°
29°
21
45°
30°
22
51°
29°
23
52°
28°
24
53°
32°
25
53°
31°
26
52°
32°
27
54°
31°
28
53°
29°
29
46°
26°
30
47°
25°
1
48°
27°
2
48°
27°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Foster
Foster's April 2026 forecast shows daily high temperatures ranging from 32° to 54°, with overnight lows between 15° and 32°. The average high for April is 46° with an average low of 28°. 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 Foster. See also: May | June | July.