S
M
T
W
T
F
S
29
85°
68°
30
86°
69°
31
87°
69°
1
87°
68°
2
83°
66°
3
86°
68°
4
87°
67°
5
87°
67°
6
88°
66°
7
88°
67°
8
85°
69°
9
87°
70°
10
85°
69°
11
84°
72°
12
83°
70°
13
85°
71°
14
83°
69°
15
83°
69°
16
85°
66°
17
89°
63°
18
92°
64°
19
91°
65°
20
92°
66°
21
91°
65°
22
92°
64°
23
91°
63°
24
86°
70°
25
87°
69°
26
86°
70°
27
85°
70°
28
85°
69°
29
86°
70°
30
85°
70°
1
84°
69°
2
85°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Arenal
Arenal's April 2026 forecast shows daily high temperatures ranging from 83° to 92°, with overnight lows between 63° and 72°. The average high for April is 87° with an average low of 68°. 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 Arenal. See also: May | June | July.