S
M
T
W
T
F
S
29
36°
6°
30
42°
32°
31
41°
30°
1
38°
27°
2
38°
27°
3
39°
29°
4
39°
30°
5
43°
30°
6
46°
28°
7
40°
24°
8
42°
21°
9
46°
19°
10
51°
36°
11
49°
33°
12
54°
31°
13
45°
36°
14
59°
44°
15
49°
42°
16
52°
41°
17
66°
37°
18
60°
32°
19
52°
37°
20
46°
27°
21
43°
22°
22
46°
34°
23
44°
33°
24
48°
30°
25
47°
33°
26
50°
34°
27
55°
32°
28
52°
33°
29
55°
36°
30
57°
34°
1
58°
35°
2
56°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in Saint John
Saint John's April 2026 forecast shows daily high temperatures ranging from 43° to 58°, with overnight lows between 22° and 36°. The average high for April is 51° with an average low of 32°. 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 Saint John. See also: May | June | July.
