S
M
T
W
T
F
S
30
69°
43°
31
54°
36°
1
61°
30°
2
77°
56°
3
56°
45°
4
50°
46°
5
47°
43°
6
50°
35°
7
60°
28°
8
54°
28°
9
73°
38°
10
67°
42°
11
53°
36°
12
64°
30°
13
86°
48°
14
71°
50°
15
62°
37°
16
73°
33°
17
81°
51°
18
80°
58°
19
62°
51°
20
77°
52°
21
69°
49°
22
81°
44°
23
80°
48°
24
84°
54°
25
79°
60°
26
64°
53°
27
59°
49°
28
87°
54°
29
74°
55°
30
75°
54°
1
75°
61°
2
65°
52°
3
56°
49°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Sullivan
Sullivan's April 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for April is ° with an average low of °. 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 Sullivan. See also: May | June | July.