St. Catharines Weather in 2023

Historical record of St. Catharines, Ontario weather for the year 2023 based on NOAA data.

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2023 St. Catharines Weather Extremes
Highest temperature	31.9 °C	September 5
Lowest temperature	-14.7 °C	February 3
Highest daily low	21.9 °C	September 5
Lowest daily high	-6.2 °C	February 3
Most daily precipitation	3.4 cm	July 29
Total annual precipitation	67.9 cm	-

What was the hottest temperature in St. Catharines in 2023?

The highest temperature recorded in St. Catharines, Ontario in 2023 was 31.9 °C which happened on September 5.

Highest Temperatures: All-Time By Year

Highest Temperatures in St. Catharines in 2023

Rank	Temperature	Date
1	31.9 °C	Sep 5
2	31.6 °C	Sep 6
3	30.9 °C	Jul 4
4	30.7 °C	Jul 5
5	30.6 °C	Jul 6
6	30.3 °C	Jul 28
7	30.2 °C	Sep 4
8	29.4 °C	Jul 26
9	29.3 °C	Jul 20
10	29.0 °C	Jul 10

What was the coldest temperature in St. Catharines in 2023?

The lowest temperature recorded in St. Catharines, Ontario in 2023 was -14.7 °C which happened on Feb 3.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in St. Catharines in 2023

Rank	Temperature	Date
1	-14.7 °C	February 3
2	-14.6 °C	February 4
3	-8.8 °C	February 1
4	-7.0 °C	February 25
5	-6.6 °C	January 31
6	-6.4 °C	February 2
7	-6.1 °C	February 24
7	-6.1 °C	January 16
9	-5.9 °C	January 14
10	-5.6 °C	February 18
10	-5.6 °C	February 17

January 2023 St. Catharines Weather

Day	High (°C)	Low (°C)	Precip. (cm)
January 1	4.6	3.0	0.03
January 2	5.5	1.6	0.00
January 3	3.1	2.2	0.31
January 4	3.6	2.4	2.09
January 5	4.8	2.4	0.00
January 6	3.3	1.8	0.01
January 7	3.5	-2.2	0.03
January 8	-0.4	-2.5	0.00
January 9	2.9	-1.1	0.00
January 10	2.0	-1.0	0.00
January 11	1.3	-2.4	0.00
January 12	6.0	0.8	0.78
January 13	1.2	-4.4	0.39
January 14	0.2	-5.9	0.00
January 15	-0.1	-4.4	0.00
January 16	0.4	-6.1	0.00
January 17	6.7	0.1	0.35
January 18	4.2	2.3	0.11
January 19	4.0	1.9	0.19
January 20	3.3	0.5	0.70
January 21	1.1	0.1	0.00
January 22	1.6	0.2	0.28
January 23	1.6	-0.5	0.01
January 24	2.9	-0.8	0.00
January 25	3.7	-1.0	0.47
January 26	3.0	-1.8	0.13
January 27	2.3	-1.6	0.04
January 28	2.9	-0.1	0.04
January 29	4.0	-2.8	0.25
January 30	-0.6	-3.9	0.01
January 31	-2.7	-6.6	0.00

February 2023 St. Catharines Weather

Day	High (°C)	Low (°C)	Precip. (cm)
February 1	-2.6	-8.8	0.00
February 2	2.0	-6.4	0.00
February 3	-6.2	-14.7	0.00
February 4	2.1	-14.6	0.00
February 5	5.9	2.0	0.00
February 6	2.6	-0.5	0.01
February 7	8.8	-2.1	0.00
February 8	6.9	-0.4	0.00
February 9	8.4	-0.3	2.19
February 10	4.7	0.2	0.00
February 11	2.4	-1.1	0.00
February 12	5.9	-0.5	0.00
February 13	8.3	-1.6	0.00
February 14	10.1	0.2	0.00
February 15	14.6	4.6	0.00
February 16	4.9	1.3	0.32
February 17	1.4	-5.6	0.35
February 18	4.1	-5.6	0.00
February 19	10.0	2.5	0.00
February 20	8.0	0.9	0.00
February 21	6.5	-0.9	0.00
February 22	1.3	-2.5	0.86
February 23	2.3	-3.9	0.06
February 24	2.0	-6.1	0.00
February 25	-1.7	-7.0	0.01
February 26	4.1	-1.9	0.00
February 27	1.0	-2.9	0.44
February 28	2.3	0.0	0.05

March 2023 St. Catharines Weather

Day	High (°C)	Low (°C)	Precip. (cm)
March 1	2.5	-0.4	0.00
March 2	5.5	-0.3	0.00
March 3	1.9	-1.1	2.09
March 4	5.5	0.2	0.21
March 5	6.2	0.0	0.03
March 6	2.4	-0.6	0.00
March 7	4.1	0.1	0.00
March 8	3.6	-0.6	0.00
March 9	2.9	-1.2	0.00
March 10	1.3	-1.4	0.34
March 11	0.3	-1.4	0.03
March 12	0.8	-1.4	0.05
March 13	2.2	-1.1	0.20
March 14	2.2	-2.6	0.02
March 15	5.6	-2.2	0.00
March 16	9.9	1.8	0.34
March 17	9.6	1.7	0.50
March 18	3.7	-3.6	0.01
March 19	2.1	-4.0	0.00
March 20	6.4	0.6	0.00
March 21	8.6	2.9	0.00
March 22	8.8	1.2	0.01
March 23	8.5	1.1	0.52
March 24	4.6	0.2	0.00
March 25	11.3	1.6	0.97
March 26	9.0	2.9	0.00
March 27	5.7	1.2	0.36
March 28	6.9	1.4	0.01
March 29	9.0	-1.7	0.11
March 30	4.8	-2.6	0.00
March 31	9.3	0.4	1.06

April 2023 St. Catharines Weather

Day	High (°C)	Low (°C)	Precip. (cm)
April 1	n/a	n/a	n/a
April 2	n/a	n/a	n/a
April 3	n/a	n/a	n/a
April 4	n/a	n/a	n/a
April 5	n/a	n/a	n/a
April 6	n/a	n/a	n/a
April 7	n/a	n/a	n/a
April 8	n/a	n/a	n/a
April 9	n/a	n/a	n/a
April 10	n/a	n/a	n/a
April 11	n/a	n/a	n/a
April 12	n/a	n/a	n/a
April 13	n/a	n/a	n/a
April 14	n/a	n/a	n/a
April 15	n/a	n/a	n/a
April 16	n/a	n/a	n/a
April 17	n/a	n/a	n/a
April 18	n/a	n/a	n/a
April 19	n/a	n/a	n/a
April 20	n/a	n/a	n/a
April 21	n/a	n/a	n/a
April 22	12.3	6.8	0.95
April 23	10.8	6.2	0.00
April 24	9.6	5.0	0.04
April 25	11.6	4.3	0.03
April 26	9.7	4.3	0.00
April 27	8.8	3.8	0.00
April 28	13.3	7.4	0.32
April 29	12.9	6.9	0.04
April 30	13.6	6.7	0.63

May 2023 St. Catharines Weather

Day	High (°C)	Low (°C)	Precip. (cm)
May 1	10.7	6.2	0.19
May 2	9.3	3.9	0.70
May 3	9.5	3.6	0.21
May 4	10.6	6.4	0.00
May 5	12.2	6.0	0.00
May 6	13.5	5.9	0.00
May 7	12.7	8.4	0.23
May 8	19.0	7.1	0.00
May 9	14.0	8.4	0.00
May 10	20.4	7.6	0.00
May 11	24.6	11.6	0.00
May 12	25.4	13.7	0.00
May 13	17.8	11.7	0.00
May 14	15.5	9.4	0.00
May 15	21.0	8.8	0.00
May 16	20.2	8.2	0.00
May 17	10.6	4.5	0.00
May 18	11.6	4.9	0.00
May 19	22.8	6.8	0.00
May 20	16.6	11.7	2.47
May 21	23.5	10.9	0.00
May 22	13.7	9.3	0.00
May 23	15.9	9.0	0.00
May 24	15.7	8.4	0.00
May 25	13.7	7.7	0.00
May 26	18.6	6.9	0.00
May 27	19.0	9.8	0.00
May 28	23.4	11.5	0.00
May 29	17.7	13.2	0.00
May 30	19.8	13.0	0.00
May 31	25.3	13.7	0.00

June 2023 St. Catharines Weather

Day	High (°C)	Low (°C)	Precip. (cm)
June 1	25.2	15.4	0.00
June 2	28.9	17.8	0.00
June 3	20.3	13.3	0.00
June 4	17.7	11.1	0.00
June 5	22.5	9.8	0.00
June 6	21.4	14.4	0.00
June 7	22.1	13.3	0.00
June 8	18.0	14.1	0.02
June 9	20.2	13.7	0.05
June 10	25.9	14.8	0.00
June 11	20.6	15.9	0.50
June 12	19.6	13.7	2.22
June 13	20.2	12.9	0.38
June 14	17.6	12.9	0.12
June 15	19.9	13.1	0.00
June 16	20.5	14.4	0.65
June 17	24.1	14.8	0.00
June 18	21.6	15.0	0.00
June 19	20.6	15.2	0.00
June 20	17.5	14.9	0.00
June 21	18.0	12.8	0.00
June 22	n/a	n/a	n/a
June 23	19.9	17.4	0.06
June 24	25.3	18.1	0.60
June 25	25.0	19.1	0.03
June 26	25.0	19.1	1.20
June 27	24.3	18.1	0.16
June 28	22.9	16.4	0.00
June 29	22.5	15.1	0.00
June 30	24.1	18.8	0.12

July 2023 St. Catharines Weather

Day	High (°C)	Low (°C)	Precip. (cm)
July 1	27.4	19.3	0.00
July 2	22.3	20.6	1.22
July 3	21.7	18.9	0.45
July 4	30.9	18.5	0.00
July 5	30.7	21.6	0.00
July 6	30.6	21.9	0.00
July 7	27.9	19.8	0.01
July 8	26.6	16.8	0.00
July 9	23.9	19.7	0.00
July 10	29.0	19.6	0.00
July 11	28.8	21.3	0.00
July 12	23.8	18.4	0.06
July 13	26.2	18.7	0.18
July 14	25.4	17.5	0.00
July 15	24.8	20.4	1.41
July 16	26.6	19.8	0.23
July 17	26.8	19.4	0.00
July 18	27.7	18.7	0.00
July 19	24.2	17.9	0.00
July 20	29.3	18.3	2.15
July 21	26.6	18.3	0.00
July 22	28.1	18.4	0.00
July 23	26.3	17.7	1.85
July 24	26.9	19.0	1.73
July 25	26.2	19.8	0.26
July 26	29.4	21.1	1.37
July 27	28.3	21.3	0.20
July 28	30.3	21.2	0.00
July 29	24.6	17.7	3.43
July 30	25.7	17.6	0.15
July 31	24.7	18.8	0.05

August 2023 St. Catharines Weather

Day	High (°C)	Low (°C)	Precip. (cm)
August 1	24.9	17.9	0.00
August 2	25.7	17.0	0.00
August 3	27.4	19.4	0.53
August 4	27.1	19.5	0.00
August 5	22.8	18.6	0.00
August 6	22.8	17.6	0.20
August 7	26.0	18.4	0.04
August 8	24.8	17.8	0.09
August 9	28.7	18.3	0.00
August 10	26.6	18.6	0.09
August 11	25.4	18.6	0.00
August 12	27.4	20.0	0.59
August 13	26.8	19.5	0.00
August 14	22.3	18.9	0.00
August 15	21.6	16.6	2.18
August 16	27.0	18.0	0.05
August 17	25.7	18.1	0.39
August 18	20.6	16.5	0.00
August 19	24.6	15.9	0.00
August 20	27.2	18.0	0.00
August 21	21.6	19.2	0.00
August 22	22.1	18.3	0.00
August 23	20.8	17.2	0.39
August 24	23.6	18.8	1.40
August 25	24.3	18.9	n/a
August 26	24.1	18.1	0.00
August 27	19.6	15.7	0.00
August 28	20.8	14.2	0.00
August 29	21.5	15.6	0.15
August 30	21.8	15.2	0.02
August 31	20.3	14.9	0.00

September 2023 St. Catharines Weather

Day	High (°C)	Low (°C)	Precip. (cm)
September 1	21.7	14.2	0.00
September 2	25.9	16.4	0.00
September 3	28.4	20.5	0.00
September 4	30.2	21.9	0.00
September 5	31.9	21.9	0.00
September 6	31.6	21.6	0.10
September 7	28.9	19.3	0.70
September 8	21.1	17.5	0.00
September 9	19.6	17.4	0.16
September 10	21.6	17.7	0.00
September 11	22.1	16.7	0.00
September 12	23.2	17.3	0.02
September 13	20.9	15.1	0.00
September 14	20.9	14.1	0.00
September 15	19.4	13.6	0.00
September 16	23.7	12.9	0.00
September 17	23.0	15.4	0.00
September 18	22.8	15.4	0.09
September 19	22.3	14.5	0.00
September 20	19.7	13.4	0.00
September 21	22.2	14.5	0.00
September 22	20.7	13.1	0.00
September 23	18.5	13.8	0.00
September 24	17.5	14.0	0.00
September 25	18.4	15.3	0.00
September 26	17.9	14.2	0.00
September 27	20.5	13.1	0.00
September 28	18.1	13.5	0.11
September 29	19.5	14.9	0.00
September 30	20.7	15.1	0.00

October 2023 St. Catharines Weather

Day	High (°C)	Low (°C)	Precip. (cm)
October 1	24.4	15.7	0.00
October 2	23.6	16.9	0.00
October 3	27.2	18.3	0.00
October 4	23.1	18.2	0.00
October 5	26.5	17.6	1.72
October 6	23.5	15.8	0.26
October 7	16.7	12.1	0.00
October 8	13.6	9.8	0.70
October 9	15.4	8.4	0.00
October 10	14.5	9.4	0.12
October 11	16.8	9.5	0.01
October 12	14.4	10.5	0.00
October 13	13.6	10.6	0.03
October 14	13.7	10.3	0.13
October 15	12.5	9.2	0.04
October 16	14.2	9.7	0.00
October 17	15.6	10.7	0.00
October 18	14.9	10.6	0.00
October 19	17.7	10.5	0.00
October 20	16.0	12.2	0.29
October 21	12.7	8.8	0.04
October 22	12.6	6.4	0.02
October 23	14.2	4.2	0.00
October 24	20.6	10.1	0.00
October 25	21.0	13.1	0.16
October 26	21.1	14.1	0.65
October 27	20.8	15.9	0.00
October 28	18.5	8.7	0.00
October 29	9.4	5.8	0.63
October 30	8.2	4.5	0.74
October 31	7.8	1.9	0.00

November 2023 St. Catharines Weather

Day	High (°C)	Low (°C)	Precip. (cm)
November 1	7.9	2.6	0.00
November 2	9.6	2.9	0.00
November 3	14.3	8.9	0.00
November 4	12.0	8.5	0.05
November 5	10.8	6.2	0.00
November 6	15.1	7.1	0.43
November 7	14.3	2.5	0.00
November 8	4.4	1.2	1.04
November 9	10.1	3.3	0.42
November 10	11.2	6.9	0.00
November 11	6.9	3.5	0.00
November 12	5.3	2.3	0.00
November 13	12.8	1.9	0.00
November 14	10.8	5.6	0.00
November 15	13.8	5.1	0.00
November 16	14.7	5.6	0.00
November 17	16.5	4.7	0.06
November 18	9.3	3.4	0.00
November 19	9.4	2.4	0.00
November 20	2.8	0.1	0.00
November 21	7.8	-0.1	0.76
November 22	8.7	4.1	0.02
November 23	8.5	2.0	0.00
November 24	2.6	-0.2	0.00
November 25	4.9	-0.9	0.00
November 26	8.0	1.9	0.31
November 27	5.0	-1.4	0.00
November 28	0.7	-2.6	0.00
November 29	2.8	-2.4	0.02
November 30	10.5	0.5	0.00

December 2023 St. Catharines Weather

Day	High (°C)	Low (°C)	Precip. (cm)
December 1	8.6	4.1	0.94
December 2	5.4	3.6	0.13
December 3	5.4	3.8	0.27
December 4	5.2	1.9	0.00
December 5	3.1	0.5	0.31
December 6	3.1	-0.3	0.26
December 7	5.5	0.4	0.32
December 8	11.2	3.6	0.00
December 9	15.5	10.3	0.95
December 10	12.1	3.5	0.08
December 11	4.2	1.5	0.00
December 12	6.8	1.2	0.00
December 13	4.3	-0.5	0.00
December 14	6.8	-1.0	0.00
December 15	10.5	4.3	0.00
December 16	6.5	4.3	0.00
December 17	9.7	4.6	0.73
December 18	7.0	0.3	0.39
December 19	1.6	-1.7	0.06
December 20	4.4	-0.2	0.00
December 21	3.4	-2.3	0.00
December 22	2.3	-2.3	0.00
December 23	5.2	1.4	0.55
December 24	4.7	4.1	0.00
December 25	5.6	3.1	0.00
December 26	5.7	2.9	0.28
December 27	6.0	4.6	2.22
December 28	5.4	4.6	0.14
December 29	6.5	3.5	0.06
December 30	3.6	0.8	0.04
December 31	2.2	1.1	0.13

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Weather Station Details

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