S
M
T
W
T
F
S
29
92°
69°
30
92°
67°
31
93°
69°
1
93°
74°
2
95°
76°
3
95°
76°
4
93°
77°
5
78°
56°
6
79°
57°
7
80°
57°
8
78°
67°
9
85°
72°
10
85°
68°
11
83°
72°
12
87°
74°
13
88°
73°
14
88°
73°
15
89°
75°
16
92°
71°
17
93°
74°
18
93°
70°
19
80°
63°
20
81°
66°
21
89°
69°
22
91°
70°
23
92°
71°
24
88°
65°
25
92°
70°
26
90°
69°
27
87°
70°
28
90°
70°
29
91°
69°
30
91°
70°
1
90°
71°
2
92°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Sullivan City
Sullivan City's April 2026 forecast shows daily high temperatures ranging from 80° to 93°, with overnight lows between 63° and 75°. The average high for April is 89° with an average low of 70°. 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 City. See also: May | June | July.