S
M
T
W
T
F
S
29
48°
45°
30
52°
46°
31
59°
43°
1
59°
39°
2
54°
46°
3
61°
43°
4
61°
48°
5
68°
43°
6
72°
37°
7
64°
46°
8
59°
45°
9
53°
31°
10
50°
32°
11
52°
38°
12
59°
37°
13
60°
42°
14
63°
46°
15
69°
45°
16
63°
47°
17
60°
46°
18
60°
47°
19
64°
47°
20
64°
46°
21
62°
47°
22
67°
47°
23
68°
48°
24
70°
49°
25
71°
49°
26
71°
48°
27
70°
49°
28
64°
47°
29
66°
44°
30
66°
43°
1
67°
45°
2
71°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Sliven
Sliven's April 2026 forecast shows daily high temperatures ranging from 50° to 71°, with overnight lows between 31° and 50°. The average high for April is 64° with an average low of 45°. 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 Sliven. See also: May | June | July.