S
M
T
W
T
F
S
29
49°
32°
30
64°
34°
31
61°
40°
1
43°
36°
2
37°
35°
3
66°
36°
4
50°
37°
5
51°
36°
6
42°
35°
7
38°
29°
8
38°
28°
9
65°
36°
10
43°
38°
11
50°
36°
12
44°
38°
13
67°
39°
14
70°
46°
15
60°
41°
16
64°
44°
17
53°
39°
18
76°
39°
19
49°
35°
20
44°
33°
21
56°
33°
22
52°
38°
23
54°
41°
24
50°
41°
25
47°
40°
26
49°
38°
27
63°
42°
28
64°
45°
29
51°
41°
30
55°
41°
1
50°
39°
2
50°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
April Weather in St. Catharines
St. Catharines's April 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for April is ° with an average low of °. 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. Catharines. See also: May | June | July.
