S
M
T
W
T
F
S
29
59°
26°
30
74°
41°
31
80°
53°
1
69°
42°
2
52°
43°
3
61°
42°
4
76°
50°
5
55°
41°
6
52°
37°
7
44°
29°
8
53°
22°
9
61°
36°
10
76°
44°
11
62°
33°
12
69°
48°
13
77°
54°
14
82°
62°
15
80°
60°
16
75°
52°
17
73°
44°
18
71°
45°
19
66°
48°
20
70°
49°
21
69°
48°
22
67°
41°
23
59°
38°
24
59°
47°
25
64°
47°
26
61°
42°
27
60°
42°
28
61°
40°
29
62°
40°
30
62°
42°
1
63°
50°
2
73°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Caldwell
Caldwell's April 2026 forecast shows daily high temperatures ranging from 59° to 82°, with overnight lows between 33° and 62°. The average high for April is 68° with an average low of 46°. 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 Caldwell. See also: May | June | July.