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