S
M
T
W
T
F
S
29
70°
36°
30
70°
57°
31
82°
54°
1
81°
59°
2
86°
56°
3
82°
61°
4
81°
57°
5
66°
48°
6
66°
45°
7
68°
37°
8
73°
43°
9
75°
43°
10
77°
50°
11
82°
53°
12
87°
59°
13
79°
59°
14
83°
58°
15
86°
58°
16
82°
52°
17
81°
54°
18
82°
54°
19
78°
55°
20
77°
53°
21
76°
52°
22
75°
45°
23
75°
52°
24
77°
52°
25
72°
51°
26
74°
50°
27
72°
49°
28
72°
49°
29
76°
52°
30
77°
53°
1
77°
54°
2
74°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Decatur
Decatur's April 2026 forecast shows daily high temperatures ranging from 72° to 87°, with overnight lows between 43° and 59°. The average high for April is 78° with an average low of 53°. 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 Decatur. See also: May | June | July.