S
M
T
W
T
F
S
29
24°
6°
30
34°
19°
31
31°
15°
1
22°
6°
2
26°
13°
3
28°
18°
4
29°
22°
5
27°
19°
6
32°
22°
7
29°
18°
8
27°
23°
9
33°
21°
10
40°
32°
11
38°
22°
12
35°
20°
13
38°
26°
14
39°
23°
15
34°
22°
16
35°
25°
17
37°
27°
18
38°
31°
19
40°
30°
20
38°
28°
21
39°
29°
22
39°
32°
23
40°
33°
24
40°
33°
25
41°
32°
26
42°
34°
27
41°
31°
28
40°
28°
29
41°
28°
30
41°
29°
1
43°
32°
2
43°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in St. John Island
St. John Island's April 2026 forecast shows daily high temperatures ranging from 27° to 43°, with overnight lows between 20° and 35°. The average high for April is 38° with an average low of 28°. 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 St. John Island. See also: May | June | July.
