Ottawa Weather in 2021

Historical record of Ottawa, Ontario weather for the year 2021 based on NOAA data.

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2021 Ottawa Weather Extremes
Highest temperature	33.5 °C	August 25
Lowest temperature	-23.0 °C	February 13
Highest daily low	22.5 °C	August 11
Lowest daily high	-13.5 °C	February 12
Most daily precipitation	4.2 cm	October 15
Most daily snow	15.0 cm	December 5
Total annual precipitation	89.7 cm	-
Total annual snow	172.0 cm	-

What was the hottest temperature in Ottawa in 2021?

The highest temperature recorded in Ottawa, Ontario in 2021 was 33.5 °C which happened 3 different times.

Highest Temperatures: All-Time By Year

Highest Temperatures in Ottawa in 2021

Rank	Temperature	Date
1	33.5 °C	Aug 25
1	33.5 °C	Aug 21
1	33.5 °C	Jun 7
4	33.0 °C	Aug 22
4	33.0 °C	Aug 20
6	32.5 °C	Jun 6
7	32.0 °C	Aug 26
7	32.0 °C	Aug 24
7	32.0 °C	Jun 27
7	32.0 °C	Jun 8
7	32.0 °C	May 21

What was the coldest temperature in Ottawa in 2021?

The lowest temperature recorded in Ottawa, Ontario in 2021 was -23.0 °C which happened 2 different times.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Ottawa in 2021

Rank	Temperature	Date
1	-23.0 °C	February 13
1	-23.0 °C	February 1
3	-22.0 °C	February 12
4	-20.5 °C	February 8
5	-20.0 °C	February 18
5	-20.0 °C	February 11
5	-20.0 °C	January 31
5	-20.0 °C	January 29
9	-19.0 °C	March 2
9	-19.0 °C	January 30
9	-19.0 °C	January 25
9	-19.0 °C	January 24

January 2021 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
January 1	0.0	-6.5	0.94	10.0
January 2	0.0	-5.0	0.00	0.0
January 3	-1.5	-6.0	0.00	0.0
January 4	-0.5	-3.0	0.00	0.0
January 5	-1.0	-3.0	0.16	2.0
January 6	-2.0	-4.0	0.00	0.0
January 7	-3.0	-5.5	0.00	0.0
January 8	-4.0	-11.5	0.00	0.0
January 9	-1.0	-9.0	0.00	0.0
January 10	-5.0	-10.5	0.00	0.0
January 11	1.0	-10.5	0.06	1.0
January 12	1.5	-1.5	0.00	0.0
January 13	1.0	-2.0	0.56	0.0
January 14	1.0	-0.5	0.00	0.0
January 15	1.0	-2.0	1.40	10.0
January 16	1.0	-1.0	1.04	6.0
January 17	0.0	-3.5	0.00	0.0
January 18	-7.0	-10.0	0.00	0.0
January 19	-7.0	-16.0	0.14	2.0
January 20	-9.0	-11.0	0.40	5.0
January 21	-1.5	-16.0	0.26	4.0
January 22	-5.0	-8.0	0.00	n/a
January 23	-13.0	-18.0	0.00	0.0
January 24	-10.0	-19.0	0.00	0.0
January 25	-6.0	-19.0	0.06	1.0
January 26	-3.5	-8.5	0.70	7.0
January 27	-3.0	-8.0	0.00	0.0
January 28	-11.0	-12.5	0.00	0.0
January 29	-11.0	-20.0	0.00	0.0
January 30	-10.0	-19.0	0.00	0.0
January 31	-11.0	-20.0	0.00	0.0

February 2021 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
February 1	-5.0	-23.0	0.00	0.0
February 2	2.0	-13.5	0.18	2.0
February 3	2.5	-4.5	0.00	0.0
February 4	2.0	-8.5	0.10	1.0
February 5	2.0	-11.0	0.18	2.0
February 6	-4.0	-11.0	0.00	0.0
February 7	-4.0	-12.0	0.28	4.0
February 8	-6.0	-20.5	0.06	1.0
February 9	-4.0	-15.0	0.06	1.0
February 10	-6.0	-14.5	0.00	0.0
February 11	-8.0	-20.0	0.00	0.0
February 12	-13.5	-22.0	0.00	0.0
February 13	-11.5	-23.0	0.24	4.0
February 14	-6.0	-14.0	0.00	0.0
February 15	-3.0	-14.5	1.40	15.0
February 16	-8.0	-11.0	0.12	2.0
February 17	-6.5	-18.5	0.00	0.0
February 18	-2.5	-20.0	0.52	2.0
February 19	-5.5	-10.0	0.36	6.0
February 20	-3.5	-13.0	0.00	n/a
February 21	-1.0	-16.0	0.14	0.0
February 22	1.0	-10.0	0.80	7.0
February 23	3.0	-3.0	0.40	0.0
February 24	3.0	-4.0	1.70	14.0
February 25	-4.5	-8.0	0.00	0.0
February 26	1.0	-15.0	0.76	0.0
February 27	4.0	-12.0	0.86	10.0
February 28	5.0	-13.0	0.44	0.0

March 2021 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
March 1	4.0	-4.5	0.00	0.0
March 2	-3.0	-19.0	0.60	8.0
March 3	0.5	-10.0	0.00	0.0
March 4	-7.5	-13.0	0.00	0.0
March 5	-5.5	-15.5	0.00	0.0
March 6	-5.0	-11.0	0.00	0.0
March 7	-6.0	-15.0	0.00	0.0
March 8	-1.5	-18.0	0.00	0.0
March 9	7.0	-9.0	0.00	0.0
March 10	10.0	-7.5	0.00	0.0
March 11	14.5	2.5	0.00	0.0
March 12	7.0	1.0	0.00	0.0
March 13	0.0	-10.0	0.00	0.0
March 14	-2.0	-6.0	0.00	0.0
March 15	-5.0	-15.0	0.00	0.0
March 16	3.0	-12.0	0.00	0.0
March 17	9.0	-7.0	0.00	0.0
March 18	5.0	1.0	0.00	0.0
March 19	2.0	-9.0	0.00	0.0
March 20	14.0	-3.0	0.00	0.0
March 21	15.0	-2.5	0.00	0.0
March 22	18.0	-3.0	0.00	0.0
March 23	20.0	-1.0	0.00	0.0
March 24	12.0	2.0	1.02	0.0
March 25	19.5	6.0	1.30	0.0
March 26	7.5	4.0	2.10	0.0
March 27	5.0	-1.0	0.00	0.0
March 28	11.0	1.0	1.67	0.0
March 29	4.0	-4.0	0.00	0.0
March 30	17.0	-2.0	0.00	0.0
March 31	13.0	5.0	0.18	0.0

April 2021 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
April 1	1.0	-3.0	0.00	0.0
April 2	4.0	-7.0	0.00	0.0
April 3	11.0	-5.0	0.00	0.0
April 4	14.0	-1.0	0.00	0.0
April 5	14.0	1.5	0.00	0.0
April 6	16.5	-1.0	0.00	0.0
April 7	19.0	2.0	0.00	0.0
April 8	22.5	6.0	0.00	0.0
April 9	23.5	7.0	0.00	0.0
April 10	25.0	6.0	0.00	0.0
April 11	20.0	8.0	0.00	0.0
April 12	18.0	9.0	0.00	0.0
April 13	18.0	8.5	0.00	0.0
April 14	18.0	8.5	0.18	0.0
April 15	11.0	8.0	2.04	0.0
April 16	9.0	3.5	0.00	0.0
April 17	13.5	4.0	0.00	0.0
April 18	15.0	4.5	0.00	0.0
April 19	18.0	5.0	0.16	0.0
April 20	8.0	4.0	0.00	0.0
April 21	3.5	-3.5	0.06	1.0
April 22	7.0	-3.0	0.00	0.0
April 23	17.0	1.5	0.00	0.0
April 24	21.0	6.0	0.00	0.0
April 25	15.0	3.0	0.28	0.0
April 26	12.0	-2.0	0.00	0.0
April 27	15.5	1.5	0.00	0.0
April 28	16.5	8.0	0.60	0.0
April 29	17.0	7.5	1.04	0.0
April 30	11.5	1.5	1.60	0.0

May 2021 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
May 1	12.0	-1.0	0.20
May 2	15.0	1.0	0.00
May 3	11.5	6.5	0.04
May 4	13.5	5.5	0.12
May 5	11.0	3.5	0.00
May 6	14.0	3.5	0.00
May 7	13.0	4.5	0.64
May 8	11.5	6.0	0.20
May 9	15.5	4.5	0.00
May 10	17.0	4.0	0.00
May 11	12.0	4.0	0.20
May 12	18.0	4.5	0.00
May 13	22.0	4.0	0.00
May 14	24.0	6.5	0.00
May 15	24.0	10.0	0.00
May 16	24.5	9.0	0.00
May 17	26.0	7.0	0.00
May 18	26.5	13.5	0.00
May 19	30.0	9.5	0.00
May 20	29.0	14.5	0.00
May 21	32.0	16.0	0.00
May 22	28.0	20.0	0.00
May 23	19.0	13.0	0.00
May 24	22.0	6.0	0.00
May 25	28.0	10.5	0.00
May 26	28.0	19.0	0.00
May 27	14.5	7.0	0.00
May 28	14.0	2.5	0.00
May 29	19.0	4.0	0.00
May 30	21.0	3.0	0.00
May 31	24.0	4.5	0.00

June 2021 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
June 1	25.5	12.5	0.18
June 2	27.5	10.0	0.60
June 3	22.0	15.0	0.14
June 4	26.5	14.0	0.00
June 5	29.0	15.5	0.34
June 6	32.5	16.5	0.00
June 7	33.5	18.5	0.00
June 8	32.0	22.5	0.00
June 9	29.5	21.5	0.00
June 10	24.0	14.0	0.06
June 11	25.5	15.0	0.00
June 12	27.0	11.0	0.00
June 13	29.0	12.0	0.10
June 14	23.5	17.0	1.00
June 15	23.0	12.5	0.16
June 16	22.0	10.0	0.00
June 17	26.5	10.5	0.00
June 18	21.5	13.5	1.94
June 19	26.0	14.5	0.00
June 20	28.5	14.5	0.40
June 21	29.0	17.0	0.22
June 22	17.0	9.5	0.00
June 23	22.5	6.5	0.00
June 24	28.0	11.0	0.00
June 25	25.0	19.0	2.70
June 26	26.0	16.5	0.18
June 27	32.0	21.0	0.10
June 28	31.5	21.5	0.00
June 29	26.5	19.5	0.42
June 30	30.0	21.0	0.00

July 2021 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
July 1	25.0	14.0	0.00
July 2	24.0	16.5	0.00
July 3	24.5	13.5	0.00
July 4	26.0	12.0	0.00
July 5	28.0	20.0	0.28
July 6	30.5	20.0	0.04
July 7	18.5	11.0	0.04
July 8	18.0	13.5	1.90
July 9	22.0	13.5	0.00
July 10	27.0	9.5	0.00
July 11	27.5	13.5	0.00
July 12	28.0	15.0	0.00
July 13	27.0	19.0	1.00
July 14	29.0	19.5	0.00
July 15	29.5	16.5	0.10
July 16	26.0	18.0	0.00
July 17	27.0	17.0	0.00
July 18	30.0	18.0	0.00
July 19	29.5	17.5	0.04
July 20	26.0	17.0	2.64
July 21	25.0	15.5	0.00
July 22	26.0	15.5	0.18
July 23	26.0	14.0	0.00
July 24	27.0	12.0	0.90
July 25	27.0	18.0	0.70
July 26	29.0	15.5	0.14
July 27	20.0	13.0	0.50
July 28	25.0	11.0	0.10
July 29	19.0	14.0	0.62
July 30	19.5	12.5	0.00
July 31	24.0	12.0	0.40

August 2021 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
August 1	19.0	13.0	0.40
August 2	23.5	14.0	0.00
August 3	26.5	12.0	0.00
August 4	28.0	14.0	0.00
August 5	29.0	14.0	0.00
August 6	30.0	17.0	0.00
August 7	28.0	17.0	0.00
August 8	28.0	19.0	0.04
August 9	31.5	19.5	0.00
August 10	31.0	20.5	0.20
August 11	31.5	22.5	0.00
August 12	31.0	22.0	0.00
August 13	31.5	19.0	1.84
August 14	24.5	17.0	0.00
August 15	24.5	9.5	0.00
August 16	26.5	10.5	0.00
August 17	23.5	14.0	0.00
August 18	30.0	21.0	0.00
August 19	29.0	19.0	0.00
August 20	33.0	17.0	0.00
August 21	33.5	19.0	0.00
August 22	33.0	20.0	0.00
August 23	29.0	22.0	0.00
August 24	32.0	20.0	0.00
August 25	33.5	17.5	0.00
August 26	32.0	21.0	0.00
August 27	24.0	17.0	0.00
August 28	20.0	16.5	0.68
August 29	26.0	16.0	0.92
August 30	29.0	21.5	0.00
August 31	25.0	17.0	0.00

September 2021 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
September 1	24.0	13.5	0.00
September 2	18.5	11.0	0.00
September 3	23.5	12.5	0.00
September 4	25.0	11.0	0.16
September 5	24.5	15.5	0.28
September 6	22.5	14.0	0.48
September 7	23.5	12.5	2.04
September 8	25.0	16.0	0.00
September 9	23.5	11.5	0.00
September 10	21.0	12.0	0.00
September 11	25.0	10.0	0.28
September 12	23.0	18.0	0.00
September 13	22.0	11.0	0.00
September 14	23.0	8.0	2.04
September 15	20.0	17.0	0.00
September 16	24.0	8.5	0.00
September 17	27.0	10.0	0.00
September 18	22.0	17.0	0.00
September 19	21.5	10.0	0.00
September 20	25.0	6.0	0.00
September 21	23.0	13.5	0.22
September 22	21.0	17.0	3.98
September 23	23.0	14.0	1.40
September 24	18.0	13.0	0.00
September 25	23.0	7.0	0.00
September 26	19.0	9.0	0.04
September 27	16.5	9.5	0.14
September 28	16.5	6.0	0.00
September 29	15.0	7.5	0.00
September 30	17.0	7.0	0.00

October 2021 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
October 1	17.0	6.0	0.76
October 2	14.0	11.0	1.80
October 3	14.0	10.5	0.12
October 4	18.0	9.0	0.00
October 5	20.5	12.0	0.00
October 6	22.0	7.0	0.00
October 7	21.0	6.0	0.00
October 8	23.0	7.0	0.00
October 9	20.0	10.0	0.60
October 10	19.0	13.0	0.14
October 11	23.5	14.5	0.00
October 12	25.0	11.5	0.10
October 13	20.5	12.0	0.32
October 14	22.5	16.0	0.22
October 15	22.0	15.5	4.20
October 16	19.0	15.0	0.68
October 17	13.5	7.0	0.04
October 18	11.5	6.0	0.04
October 19	18.0	4.5	0.00
October 20	20.0	6.0	0.28
October 21	16.0	10.0	1.56
October 22	7.0	4.0	0.00
October 23	9.0	0.0	0.00
October 24	13.5	1.0	0.00
October 25	8.0	3.0	1.06
October 26	10.5	5.0	1.22
October 27	14.0	6.0	0.00
October 28	10.5	1.0	0.00
October 29	13.5	2.0	0.00
October 30	9.5	6.0	0.50
October 31	11.5	8.0	0.40

November 2021 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
November 1	12.0	5.0	0.00	0.0
November 2	8.5	-1.0	0.52	0.0
November 3	6.0	1.5	0.00	0.0
November 4	6.0	-3.5	0.00	0.0
November 5	9.0	-4.0	0.00	0.0
November 6	11.0	-2.0	0.00	0.0
November 7	15.0	-2.0	0.00	0.0
November 8	15.5	2.0	0.00	0.0
November 9	15.0	5.0	0.00	0.0
November 10	11.5	3.0	0.00	0.0
November 11	8.0	-2.0	1.26	0.0
November 12	14.0	3.0	0.60	0.0
November 13	6.0	1.0	0.36	0.0
November 14	6.0	0.0	0.68	1.0
November 15	4.5	0.0	0.30	0.0
November 16	4.0	0.5	0.00	0.0
November 17	4.0	-4.5	1.14	0.0
November 18	8.0	0.0	0.72	0.0
November 19	3.5	1.0	0.00	0.0
November 20	4.0	-5.0	0.10	0.0
November 21	6.0	1.0	0.22	0.0
November 22	4.0	1.0	0.00	0.0
November 23	-1.0	-6.0	0.00	0.0
November 24	5.0	-9.0	0.10	0.0
November 25	2.0	-1.5	0.66	0.0
November 26	3.0	0.5	0.20	0.0
November 27	-1.0	-8.0	0.00	0.0
November 28	-2.0	-10.0	0.00	0.0
November 29	-0.5	-7.0	0.00	0.0
November 30	0.5	-8.0	0.08	1.0

December 2021 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
December 1	3.0	-4.0	0.00	0.0
December 2	8.0	-3.5	0.48	2.0
December 3	-4.0	-6.0	0.00	0.0
December 4	-5.0	-10.0	0.36	4.0
December 5	0.0	-15.0	1.50	15.0
December 6	7.5	-6.0	1.14	0.0
December 7	-6.0	-8.0	0.00	0.0
December 8	-7.5	-10.0	0.16	3.0
December 9	-6.0	-10.0	0.14	2.0
December 10	0.0	-10.5	0.34	2.0
December 11	11.0	-4.0	0.64	0.0
December 12	6.5	-1.0	0.00	0.0
December 13	8.5	1.5	0.00	0.0
December 14	1.5	-1.0	0.00	0.0
December 15	1.0	-5.0	0.68	2.0
December 16	16.0	-3.0	0.20	0.0
December 17	6.0	3.0	0.00	0.0
December 18	-4.0	-6.0	0.52	3.0
December 19	-7.0	-10.0	0.00	0.0
December 20	2.0	-18.0	0.00	0.0
December 21	-1.0	-4.0	0.04	1.0
December 22	0.0	-6.5	0.18	2.0
December 23	-9.0	-16.0	0.00	0.0
December 24	-5.0	-14.0	0.06	1.0
December 25	-1.0	-7.0	0.30	3.0
December 26	0.0	-5.0	0.00	0.0
December 27	-6.0	-13.0	0.10	1.0
December 28	-1.5	-10.0	0.10	1.0
December 29	-2.0	-5.0	0.00	0.0
December 30	0.0	-5.5	0.00	0.0
December 31	-1.0	-5.5	0.00	0.0

Next Year >

Weather Station Details

Years	Station	Coordinates
1889–2024	Ottawa CDA	location