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
76°
42°
8
69°
43°
9
68°
45°
10
68°
46°
11
55°
39°
12
57°
35°
13
63°
37°
14
61°
40°
15
62°
42°
16
65°
42°
17
62°
41°
18
62°
40°
19
63°
34°
20
65°
35°
21
61°
32°
22
63°
36°
23
60°
36°
24
60°
39°
25
61°
36°
26
65°
36°
27
70°
39°
28
70°
41°
29
69°
40°
30
71°
41°
1
71°
40°
2
67°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Callahan
Callahan's April 2026 forecast shows daily high temperatures ranging from 55° to 76°, with overnight lows between 32° and 46°. The average high for April is 65° with an average low of 39°. 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 Callahan. See also: May | June | July.