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St. Catharines April Weather

Averages and records for weather in St. Catharines, Ontario in the month of April.

Typical St. Catharines April Weather 1991–2020
Average daily high	11.0 °C
Average daily low	3.5 °C
Average monthly precipitation	7.6 cm
Daily chance of precipitation	38.9%

St. Catharines April Weather Records 1882–2024
Highest temperature	32.2 °C	April 26, 1915
Lowest temperature	-15.0 °C	April 1, 1923
Highest daily low	20.0 °C	April 25, 1990
Lowest daily high	-3.3 °C	April 4, 1975
Hottest average high temperature	17.9 °C	1915
Coldest average high temperature	8.2 °C	1975
Most daily precipitation	5.1 cm	April 20, 2017
Most monthly precipitation	14.8 cm	2017

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°C)		Record (°C)
Day	High	Low	High	Low
April 1	7.5	0.9	24.0	-15.0
April 2	7.7	1.1	23.1	-5.6
April 3	8.0	1.3	23.5	-9.4
April 4	8.2	1.4	24.5	-7.2
April 5	8.5	1.6	27.2	-7.8
April 6	8.8	1.8	27.2	-7.2
April 7	9.0	2.0	26.0	-7.8
April 8	9.2	2.2	26.0	-8.0
April 9	9.4	2.3	23.9	-7.8
April 10	9.6	2.5	27.2	-6.0
April 11	9.8	2.6	28.3	-9.0
April 12	10.0	2.8	27.0	-6.7
April 13	10.2	2.9	26.1	-8.3
April 14	10.4	3.0	25.0	-5.0
April 15	10.6	3.2	28.0	-7.8
April 16	10.7	3.3	26.0	-10.0
April 17	11.0	3.5	24.4	-4.4
April 18	11.2	3.6	27.2	-7.2
April 19	11.4	3.8	26.7	-5.0
April 20	11.7	4.0	28.3	-6.1
April 21	11.9	4.2	29.4	-3.9
April 22	12.2	4.4	29.5	-3.9
April 23	12.3	4.6	28.3	-3.9
April 24	12.5	4.7	28.9	-6.0
April 25	12.8	4.9	31.0	-3.9
April 26	13.1	5.1	32.2	-3.9
April 27	13.3	5.2	30.0	-3.3
April 28	13.4	5.4	28.3	-3.9
April 29	13.6	5.6	26.1	-1.1
April 30	13.7	5.7	28.9	-1.7

Weather Station Details

Years	Station	Coordinates
1995–2024	Port Weller (AUT)	location
1882–1994	St Catherines	location