Saint John Weather in 2021

Historical record of Saint John, New Brunswick weather for the year 2021 based on NOAA data.

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2021 Saint John Weather Extremes
Highest temperature	31.6 °C	August 25
Lowest temperature	-20.0 °C	February 10
Highest daily low	17.5 °C	August 20
Lowest daily high	-8.9 °C	March 15
Most daily precipitation	8.9 cm	September 2
Most daily snow	16.3 cm	January 2
Total annual snow	112.5 cm	-

What was the hottest temperature in Saint John in 2021?

The highest temperature recorded in Saint John, New Brunswick in 2021 was 31.6 °C which happened on August 25.

Highest Temperatures: All-Time By Year

Highest Temperatures in Saint John in 2021

Rank	Temperature	Date
1	31.6 °C	Aug 25
2	30.9 °C	Jun 29
3	30.2 °C	Jun 28
4	29.9 °C	Jun 7
5	29.7 °C	Aug 13
6	28.7 °C	Jun 9
7	27.4 °C	Aug 20
8	27.3 °C	Aug 26
8	27.3 °C	Aug 19
10	27.1 °C	Jul 5

What was the coldest temperature in Saint John in 2021?

The lowest temperature recorded in Saint John, New Brunswick in 2021 was -20.0 °C which happened on Feb 10.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Saint John in 2021

Rank	Temperature	Date
1	-20.0 °C	February 10
2	-19.4 °C	February 27
3	-18.0 °C	February 26
4	-17.9 °C	February 22
5	-17.2 °C	March 2
6	-16.8 °C	February 12
6	-16.8 °C	February 9
6	-16.8 °C	January 31
9	-16.6 °C	February 13
10	-16.0 °C	March 16

January 2021 Saint John Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
January 1	-0.8	-7.9	n/a	0.0
January 2	-0.4	-5.7	n/a	16.3
January 3	-3.0	-4.5	n/a	0.0
January 4	-1.4	-4.5	n/a	0.0
January 5	0.8	-1.5	n/a	0.0
January 6	-0.1	-2.2	n/a	0.0
January 7	0.0	-2.6	n/a	0.0
January 8	-2.6	-5.8	n/a	0.0
January 9	-0.5	-6.6	n/a	0.0
January 10	-0.8	-11.8	n/a	0.0
January 11	1.4	-13.5	n/a	0.0
January 12	n/a	n/a	0.00	0.0
January 13	1.4	-13.7	n/a	0.0
January 14	1.8	-2.3	n/a	0.0
January 15	3.1	-9.3	n/a	0.0
January 16	2.8	-9.1	n/a	0.0
January 17	4.7	0.8	n/a	0.0
January 18	3.4	-6.2	n/a	0.0
January 19	-4.0	-10.8	n/a	0.0
January 20	-3.1	-12.9	n/a	0.0
January 21	-5.3	-13.8	n/a	0.0
January 22	-1.0	-5.6	n/a	0.4
January 23	-3.8	-10.1	n/a	0.0
January 24	-3.1	-10.3	n/a	0.4
January 25	0.0	-8.1	0.00	0.0
January 26	1.4	-5.7	n/a	0.0
January 27	1.1	-4.1	n/a	0.0
January 28	2.1	-3.4	n/a	0.0
January 29	-2.8	-10.8	n/a	0.0
January 30	-7.0	-14.8	n/a	0.0
January 31	-2.9	-16.8	n/a	0.0

February 2021 Saint John Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
February 1	-1.6	-9.1	n/a	0.0
February 2	5.4	-3.5	n/a	9.5
February 3	3.1	0.1	n/a	0.0
February 4	2.1	-1.9	n/a	2.0
February 5	1.8	-2.5	n/a	1.5
February 6	3.2	-4.7	n/a	0.0
February 7	-2.4	-9.3	1.09	14.2
February 8	-2.8	-12.1	n/a	7.4
February 9	-6.1	-16.8	0.02	0.2
February 10	-4.9	-20.0	n/a	0.0
February 11	-6.5	-15.4	0.00	0.0
February 12	-3.4	-16.8	0.00	0.0
February 13	-5.2	-16.6	n/a	0.0
February 14	-3.7	-12.2	n/a	0.0
February 15	-1.7	-12.4	n/a	0.0
February 16	-0.1	-5.2	n/a	2.0
February 17	-3.7	-11.2	0.00	0.0
February 18	-6.4	-13.7	n/a	0.0
February 19	-2.7	-12.1	n/a	0.0
February 20	-5.4	-9.9	0.56	5.6
February 21	-0.9	-14.7	0.00	0.0
February 22	0.5	-17.9	n/a	6.8
February 23	1.6	-0.3	n/a	8.8
February 24	5.8	-1.1	n/a	0.0
February 25	4.1	-9.6	n/a	0.0
February 26	-6.4	-18.0	n/a	0.0
February 27	5.3	-19.4	n/a	2.4
February 28	4.8	-6.1	0.00	0.0

March 2021 Saint John Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
March 1	2.5	-4.3	2.75	0.0
March 2	-5.0	-17.2	0.04	0.4
March 3	0.8	-11.7	0.00	0.0
March 4	0.8	-9.5	0.00	0.0
March 5	-4.2	-11.5	0.00	0.0
March 6	-2.2	-14.0	0.00	0.0
March 7	-1.4	-14.0	0.00	0.0
March 8	0.0	-15.2	0.00	0.0
March 9	-0.3	-14.6	0.25	2.7
March 10	4.9	-9.2	0.00	0.0
March 11	n/a	n/a	0.00	0.0
March 12	11.7	1.2	0.00	0.0
March 13	1.9	-3.7	0.00	0.0
March 14	-1.9	-10.7	0.05	0.5
March 15	-8.9	-14.6	0.00	0.0
March 16	-3.7	-16.0	0.00	0.0
March 17	5.9	-15.0	n/a	0.0
March 18	4.4	-1.6	0.11	0.2
March 19	-1.6	-9.8	0.00	0.0
March 20	7.3	-10.7	0.00	0.0
March 21	n/a	n/a	0.00	0.0
March 22	12.5	-6.3	0.00	0.0
March 23	11.4	-3.2	0.00	0.0
March 24	12.7	0.1	0.00	0.0
March 25	12.1	4.5	0.06	0.0
March 26	10.1	0.4	2.88	0.0
March 27	0.6	-3.8	0.00	0.0
March 28	5.2	-3.5	2.26	1.4
March 29	7.5	-1.7	1.00	0.0
March 30	6.5	-3.3	0.00	0.0
March 31	10.2	2.0	0.00	0.0

April 2021 Saint John Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
April 1	12.2	-0.7	5.05	0.0
April 2	6.3	-2.4	0.00	0.0
April 3	5.2	-3.5	0.00	0.0
April 4	0.6	-2.9	n/a	1.1
April 5	4.8	0.6	0.66	0.0
April 6	9.9	1.3	0.06	0.0
April 7	9.2	2.4	0.03	0.0
April 8	14.1	-1.3	0.00	0.0
April 9	n/a	n/a	0.00	0.0
April 10	13.6	-1.1	0.00	0.0
April 11	13.1	-3.6	0.00	0.0
April 12	11.9	3.9	0.00	0.0
April 13	8.7	1.4	0.00	0.0
April 14	11.8	-4.6	0.00	0.0
April 15	12.5	-6.1	0.00	0.0
April 16	9.9	0.2	0.21	0.0
April 17	5.9	0.2	0.29	0.0
April 18	7.2	1.0	0.00	0.0
April 19	17.2	-2.2	0.00	0.0
April 20	15.4	-1.9	0.00	0.0
April 21	16.2	0.0	1.83	0.0
April 22	10.4	-1.7	0.66	0.0
April 23	9.2	-1.8	0.00	0.0
April 24	19.2	-0.4	0.00	0.0
April 25	18.9	-1.6	n/a	0.0
April 26	9.4	2.2	0.36	0.0
April 27	10.3	1.6	0.20	0.0
April 28	19.3	1.4	0.00	0.0
April 29	19.6	0.2	0.00	0.0
April 30	8.1	2.2	3.06	0.0

May 2021 Saint John Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
May 1	13.4	2.8	0.34	0.0
May 2	12.9	3.0	0.00	0.0
May 3	15.9	-0.3	0.00	0.0
May 4	18.8	-0.9	0.00	0.0
May 5	11.9	4.0	1.19	0.0
May 6	8.8	3.7	0.66	0.0
May 7	13.0	-0.6	n/a	n/a
May 8	n/a	n/a	1.06	0.0
May 9	15.2	0.1	0.12	0.0
May 10	16.5	0.2	0.00	0.0
May 11	15.5	5.3	0.07	0.0
May 12	11.0	0.4	0.21	0.0
May 13	15.4	0.4	0.09	0.0
May 14	19.8	1.8	0.00	0.0
May 15	19.1	0.6	0.00	0.0
May 16	20.2	6.1	0.00	0.0
May 17	20.3	3.8	0.00	0.0
May 18	17.3	4.1	0.06	0.0
May 19	15.9	1.9	0.00	0.0
May 20	17.5	6.6	0.00	0.0
May 21	17.4	7.9	0.05	0.0
May 22	13.6	9.1	0.16	0.0
May 23	16.3	0.5	0.34	0.0
May 24	15.0	-1.1	0.00	0.0
May 25	14.6	7.2	0.07	0.0
May 26	16.2	9.0	0.00	0.0
May 27	24.2	5.8	0.09	0.0
May 28	n/a	3.1	0.00	0.0
May 29	13.2	3.6	0.00	0.0
May 30	14.9	1.9	0.58	0.0
May 31	18.0	8.4	2.00	0.0

June 2021 Saint John Weather

Day	High (°C)	Low (°C)	Precip. (cm)
June 1	22.0	5.5	0.00
June 2	n/a	n/a	n/a
June 3	18.9	7.3	1.18
June 4	18.4	9.6	0.38
June 5	16.8	9.4	0.00
June 6	23.8	11.5	0.00
June 7	29.9	13.3	0.00
June 8	26.9	12.2	0.40
June 9	28.7	10.5	0.09
June 10	18.5	3.0	0.00
June 11	16.1	1.2	0.00
June 12	18.6	8.9	0.00
June 13	23.0	9.2	0.00
June 14	21.2	11.3	0.00
June 15	20.9	13.3	0.18
June 16	22.6	7.5	0.00
June 17	20.5	5.3	0.00
June 18	23.9	4.5	0.00
June 19	17.5	10.9	0.39
June 20	25.1	10.1	0.00
June 21	25.2	8.6	0.03
June 22	19.2	14.2	1.67
June 23	21.5	4.8	0.24
June 24	n/a	3.5	0.00
June 25	18.7	4.2	0.63
June 26	18.4	13.7	0.03
June 27	17.4	14.2	0.00
June 28	30.2	14.5	0.38
June 29	30.9	16.4	0.00
June 30	26.3	15.4	1.04

July 2021 Saint John Weather

Day	High (°C)	Low (°C)	Precip. (cm)
July 1	25.4	12.3	0.00
July 2	15.5	11.4	0.04
July 3	16.6	11.0	0.00
July 4	13.2	10.1	2.81
July 5	27.1	9.6	0.00
July 6	16.6	12.3	0.00
July 7	26.3	12.8	0.00
July 8	21.2	8.4	0.09
July 9	20.4	14.0	8.73
July 10	21.7	9.6	0.00
July 11	26.7	8.6	0.00
July 12	24.3	9.8	0.00
July 13	25.2	8.8	0.00
July 14	24.4	10.2	0.43
July 15	25.0	15.7	7.61
July 16	19.6	14.3	0.03
July 17	26.2	13.3	0.00
July 18	n/a	n/a	1.08
July 19	20.5	15.2	0.05
July 20	25.3	14.6	0.00
July 21	22.1	16.4	0.49
July 22	21.2	12.2	0.00
July 23	23.2	10.7	0.06
July 24	24.6	8.3	0.00
July 25	21.3	9.3	0.35
July 26	19.1	14.2	0.13
July 27	25.5	14.1	0.00
July 28	23.9	6.2	0.00
July 29	22.8	5.3	0.05
July 30	18.4	11.8	1.39
July 31	19.0	6.6	0.00

August 2021 Saint John Weather

Day	High (°C)	Low (°C)	Precip. (cm)
August 1	22.4	5.5	0.00
August 2	18.9	9.0	0.48
August 3	23.4	8.5	0.00
August 4	24.6	13.4	0.00
August 5	21.3	15.4	5.73
August 6	20.2	14.2	2.57
August 7	21.3	14.3	0.02
August 8	24.6	13.6	0.00
August 9	23.7	10.7	0.00
August 10	25.9	16.3	0.00
August 11	23.5	17.4	0.00
August 12	20.1	16.5	2.93
August 13	29.7	17.0	0.04
August 14	26.2	15.0	0.00
August 15	25.7	10.8	0.00
August 16	26.0	7.8	0.00
August 17	24.9	8.5	0.00
August 18	19.6	15.8	0.20
August 19	27.3	15.9	0.00
August 20	27.4	17.5	0.92
August 21	26.2	14.8	0.00
August 22	26.6	14.3	0.00
August 23	25.9	16.0	0.59
August 24	25.1	15.8	0.06
August 25	31.6	15.1	0.00
August 26	27.3	15.0	0.00
August 27	25.9	9.2	0.00
August 28	22.0	4.8	0.00
August 29	22.7	5.3	0.00
August 30	17.8	14.5	0.12
August 31	26.9	12.7	0.00

September 2021 Saint John Weather

Day	High (°C)	Low (°C)	Precip. (cm)
September 1	24.1	10.4	0.00
September 2	15.3	11.9	8.92
September 3	17.2	10.2	0.03
September 4	18.0	7.1	0.04
September 5	19.0	4.0	0.00
September 6	17.3	14.1	1.23
September 7	23.0	8.4	0.00
September 8	21.4	6.9	0.00
September 9	24.5	16.8	0.00
September 10	21.0	14.6	0.05
September 11	21.1	10.4	0.00
September 12	19.5	9.7	0.00
September 13	21.9	6.4	0.00
September 14	19.0	5.4	0.00
September 15	18.8	6.4	0.13
September 16	20.5	5.2	0.00
September 17	22.0	4.2	0.00
September 18	23.6	14.8	0.00
September 19	20.4	3.5	0.00
September 20	20.2	2.3	0.00
September 21	19.1	5.5	0.00
September 22	20.5	12.4	0.00
September 23	23.8	11.5	0.00
September 24	24.7	16.2	0.00
September 25	22.8	17.1	1.03
September 26	19.7	12.1	2.41
September 27	19.3	9.5	0.04
September 28	20.5	12.3	0.05
September 29	17.0	10.2	0.00
September 30	16.8	4.2	0.00

October 2021 Saint John Weather

Day	High (°C)	Low (°C)	Precip. (cm)
October 1	15.0	4.3	0.16
October 2	13.8	1.2	0.00
October 3	16.8	0.5	0.00
October 4	17.1	2.0	0.00
October 5	19.5	0.8	0.00
October 6	22.8	0.8	0.13
October 7	21.7	4.0	0.00
October 8	14.9	0.1	0.00
October 9	n/a	n/a	0.00
October 10	n/a	n/a	0.00
October 11	19.3	6.0	0.00
October 12	23.7	5.5	0.00
October 13	21.7	10.2	0.00
October 14	16.8	9.5	0.12
October 15	16.2	3.5	0.00
October 16	14.1	7.2	0.54
October 17	16.0	9.4	2.31
October 18	13.8	5.7	0.09
October 19	10.1	3.6	0.06
October 20	12.4	0.3	0.00
October 21	15.4	1.3	0.00
October 22	17.4	12.4	0.00
October 23	15.0	7.4	0.20
October 24	9.8	2.8	0.02
October 25	8.6	2.1	0.00
October 26	13.4	4.1	0.00
October 27	10.4	7.6	0.03
October 28	12.2	4.7	0.00
October 29	14.1	-0.3	n/a
October 30	12.1	3.3	n/a
October 31	14.8	9.9	n/a

November 2021 Saint John Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
November 1	16.2	0.6	0.00	0.0
November 2	n/a	n/a	n/a	n/a
November 3	n/a	n/a	0.00	0.0
November 4	n/a	n/a	0.00	0.0
November 5	6.2	-6.7	0.00	0.0
November 6	9.7	-7.5	0.00	0.0
November 7	11.7	-5.5	0.00	0.0
November 8	13.6	-4.4	0.00	0.0
November 9	n/a	n/a	0.00	0.0
November 10	8.3	-0.9	0.64	0.0
November 11	7.2	-4.9	0.00	0.0
November 12	12.6	-4.5	0.83	0.0
November 13	13.3	0.0	0.43	0.0
November 14	9.3	0.1	0.17	0.0
November 15	8.5	1.9	2.52	0.0
November 16	n/a	n/a	0.00	0.0
November 17	3.1	-4.5	0.19	0.0
November 18	12.6	-1.1	0.63	0.4
November 19	12.0	-0.6	0.66	0.0
November 20	3.8	-5.9	0.00	0.0
November 21	8.9	-5.6	0.83	0.0
November 22	12.2	0.9	6.95	0.0
November 23	1.3	-3.1	0.00	0.0
November 24	1.6	-3.2	0.00	0.0
November 25	6.2	-2.4	0.00	0.0
November 26	6.4	1.9	0.35	0.0
November 27	6.3	-3.8	0.98	0.0
November 28	n/a	n/a	0.00	0.0
November 29	n/a	n/a	0.71	2.3
November 30	n/a	n/a	n/a	n/a

December 2021 Saint John Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
December 1	n/a	n/a	n/a	n/a
December 2	n/a	n/a	n/a	n/a
December 3	n/a	n/a	0.00	0.0
December 4	-3.4	-11.0	0.03	0.4
December 5	-1.0	-12.6	0.20	0.0
December 6	n/a	n/a	1.48	0.0
December 7	13.1	-3.2	0.22	0.0
December 8	-3.1	-7.0	0.43	4.5
December 9	-5.8	-14.6	0.00	0.0
December 10	2.8	-15.5	0.10	0.0
December 11	n/a	n/a	1.48	0.0
December 12	12.7	1.7	0.54	0.0
December 13	5.6	2.3	0.00	0.0
December 14	4.3	-5.6	0.00	0.0
December 15	-1.4	-7.5	0.00	0.0
December 16	8.6	-3.9	0.64	2.0
December 17	8.9	1.1	0.08	0.0
December 18	1.2	-4.7	0.06	0.8
December 19	-1.6	-5.1	0.86	8.6
December 20	-5.1	-14.9	0.00	0.0
December 21	3.6	-8.4	0.00	0.0
December 22	4.5	-8.3	0.49	0.0
December 23	-1.9	-14.8	0.00	0.0
December 24	-6.6	-15.2	0.00	0.0
December 25	-0.8	-9.3	0.00	0.0
December 26	0.4	-10.7	0.00	0.0
December 27	-1.0	-9.8	0.00	0.0
December 28	1.0	-8.9	0.47	5.8
December 29	-1.1	-5.2	0.15	1.5
December 30	0.3	-3.1	0.28	2.4
December 31	1.8	-0.3	0.27	0.0

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Weather Station Details

Years	Station	Coordinates
2012–2024	Saint John	location
1947–2012	Saint John A	location
1871–1946	Saint John	location