Ottawa Weather in 2018

Historical record of Ottawa, Ontario weather for the year 2018 based on NOAA data.

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2018 Ottawa Weather Extremes
Highest temperature	35.5 °C	July 2
Lowest temperature	-28.5 °C	January 1
Highest daily low	23.0 °C	July 2
Lowest daily high	-20.5 °C	January 6
Most daily precipitation	8.5 cm	July 24
Most daily snow	11.0 cm	March 13
Total annual precipitation	86.0 cm	-
Total annual snow	195.2 cm	-

What was the hottest temperature in Ottawa in 2018?

The highest temperature recorded in Ottawa, Ontario in 2018 was 35.5 °C which happened on July 2.

Highest Temperatures: All-Time By Year

Highest Temperatures in Ottawa in 2018

Rank	Temperature	Date
1	35.5 °C	Jul 2
2	34.5 °C	Jul 16
2	34.5 °C	Jul 5
2	34.5 °C	Jul 4
2	34.5 °C	Jul 1
6	34.0 °C	Jul 9
7	33.0 °C	Jun 30
8	32.5 °C	Jul 15
8	32.5 °C	Jul 3
10	32.0 °C	Sep 5
10	32.0 °C	Aug 6

What was the coldest temperature in Ottawa in 2018?

The lowest temperature recorded in Ottawa, Ontario in 2018 was -28.5 °C which happened on Jan 1.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Ottawa in 2018

Rank	Temperature	Date
1	-28.5 °C	January 1
2	-28.0 °C	January 7
3	-25.5 °C	January 2
4	-25.0 °C	January 6
5	-24.0 °C	January 5
6	-23.5 °C	January 14
7	-22.0 °C	January 15
8	-21.0 °C	November 23
9	-20.5 °C	February 3
10	-20.0 °C	February 13
10	-20.0 °C	February 7

January 2018 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
January 1	-17.5	-28.5	0.00	0.0
January 2	-6.5	-25.5	0.18	4.0
January 3	-6.5	-15.5	0.00	0.0
January 4	-7.0	-10.5	0.26	6.0
January 5	-20.0	-24.0	0.00	0.0
January 6	-20.5	-25.0	0.00	0.0
January 7	-9.0	-28.0	0.90	10.0
January 8	1.5	-14.5	0.48	5.0
January 9	-1.0	-5.0	0.00	0.0
January 10	4.5	-18.5	0.20	0.0
January 11	10.5	-5.0	0.72	0.0
January 12	11.5	-1.0	1.62	8.0
January 13	-15.0	-17.0	0.00	0.0
January 14	-14.0	-23.5	0.00	0.0
January 15	-14.0	-22.0	0.10	1.0
January 16	-9.5	-16.5	0.00	0.0
January 17	-5.0	-18.0	0.00	0.0
January 18	-4.0	-7.0	0.00	0.0
January 19	3.0	-4.5	0.00	0.0
January 20	7.0	-2.0	0.00	0.0
January 21	2.0	-1.5	0.18	2.0
January 22	-1.5	-7.5	1.50	8.0
January 23	3.0	-7.0	0.64	5.0
January 24	-7.5	-12.0	0.00	0.0
January 25	-10.0	-17.5	0.00	0.0
January 26	-5.0	-18.5	0.00	0.0
January 27	7.0	-11.5	0.00	0.0
January 28	3.5	-0.5	0.00	0.0
January 29	-5.5	-12.0	0.00	0.0
January 30	-8.0	-13.0	0.00	0.0
January 31	-8.0	-19.0	0.34	6.0

February 2018 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
February 1	5.0	-12.5	0.00	0.0
February 2	-15.0	-19.0	0.00	0.0
February 3	-2.0	-20.5	0.54	3.0
February 4	1.0	-9.5	0.74	6.0
February 5	-8.0	-16.5	0.08	1.0
February 6	-4.5	-10.5	0.02	1.0
February 7	-8.0	-20.0	0.64	6.0
February 8	-6.0	-19.5	0.00	0.0
February 9	-6.0	-17.0	0.14	3.0
February 10	-3.0	-9.0	0.38	5.0
February 11	-2.5	-10.5	0.46	3.0
February 12	-4.0	-10.5	0.00	0.0
February 13	n/a	-20.0	n/a	n/a
February 14	n/a	n/a	n/a	n/a
February 15	n/a	n/a	n/a	n/a
February 16	n/a	n/a	n/a	n/a
February 17	n/a	n/a	n/a	n/a
February 18	n/a	n/a	n/a	n/a
February 19	6.0	-5.0	1.26	0.0
February 20	4.0	1.0	1.30	0.0
February 21	9.0	1.0	0.00	0.0
February 22	-1.0	-6.0	0.00	0.0
February 23	3.0	-6.0	0.48	0.0
February 24	2.5	-3.5	0.08	1.0
February 25	7.5	-4.0	0.30	0.0
February 26	5.0	-0.5	0.00	0.0
February 27	9.0	-4.5	0.00	0.0
February 28	10.0	1.0	0.00	0.0

March 2018 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
March 1	6.5	-0.5	0.00	0.0
March 2	1.0	-1.5	0.00	0.0
March 3	3.0	-1.5	0.04	2.0
March 4	1.0	-3.5	0.00	0.0
March 5	1.5	-4.5	0.00	0.0
March 6	0.5	-1.5	0.28	3.0
March 7	0.0	-2.0	0.30	3.0
March 8	-0.5	-2.0	0.56	5.0
March 9	2.0	-4.5	0.04	1.0
March 10	1.0	-6.0	0.00	0.0
March 11	1.5	-3.5	0.00	0.0
March 12	2.0	-5.0	0.50	3.0
March 13	0.5	-1.0	0.94	11.0
March 14	1.5	-1.5	0.14	0.0
March 15	1.5	-2.0	0.00	0.0
March 16	-4.0	-9.5	0.00	0.0
March 17	-7.0	-10.0	0.00	0.0
March 18	-4.0	-18.0	0.00	0.0
March 19	-3.0	-12.5	0.00	0.0
March 20	0.0	-11.0	0.00	0.0
March 21	3.5	-9.5	0.00	0.0
March 22	6.0	-4.5	0.00	0.0
March 23	4.5	-3.5	0.00	0.0
March 24	-1.0	-7.0	0.00	0.0
March 25	4.5	-6.0	0.00	0.0
March 26	5.0	-5.0	0.00	0.0
March 27	7.0	-7.0	0.00	0.0
March 28	6.5	1.0	0.00	0.0
March 29	7.5	1.0	1.36	0.0
March 30	7.0	2.0	0.00	0.0
March 31	8.5	-2.0	0.20	0.0

April 2018 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
April 1	3.0	-2.5	0.00
April 2	5.0	-5.0	0.00
April 3	7.0	-1.0	0.46
April 4	6.5	-0.5	0.20
April 5	-1.0	-11.0	0.00
April 6	3.5	-9.5	0.00
April 7	1.5	-2.0	0.00
April 8	1.5	-3.0	0.00
April 9	2.5	-6.0	0.00
April 10	6.5	-3.0	0.00
April 11	7.0	-3.0	0.00
April 12	7.0	-0.5	0.00
April 13	8.5	2.0	0.00
April 14	-1.5	-4.5	0.00
April 15	0.0	-4.5	0.00
April 16	2.0	-3.5	0.62
April 17	3.0	0.5	0.10
April 18	7.0	0.0	0.00
April 19	3.0	0.0	0.00
April 20	10.0	-1.0	0.00
April 21	12.0	-1.0	0.00
April 22	15.0	-2.5	0.00
April 23	19.0	-2.0	0.00
April 24	20.0	2.5	0.00
April 25	13.0	9.0	1.20
April 26	15.0	7.0	0.12
April 27	16.0	2.0	1.60
April 28	11.0	5.0	0.00
April 29	11.0	3.0	0.74
April 30	17.0	4.0	0.00

May 2018 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
May 1	20.0	1.5	0.00
May 2	27.0	10.0	0.22
May 3	17.0	11.5	0.28
May 4	22.5	6.5	0.30
May 5	23.0	6.0	0.00
May 6	19.5	8.5	0.00
May 7	16.0	5.5	0.00
May 8	23.0	3.5	0.00
May 9	27.0	6.5	0.26
May 10	20.5	15.5	0.18
May 11	12.0	1.0	0.00
May 12	18.5	0.5	0.00
May 13	22.0	3.0	0.00
May 14	25.5	8.5	0.00
May 15	20.0	13.0	0.00
May 16	23.5	5.5	0.00
May 17	18.0	13.0	0.00
May 18	18.0	5.5	0.00
May 19	18.5	8.0	2.00
May 20	18.5	12.0	0.00
May 21	25.5	9.0	0.00
May 22	19.0	12.0	0.34
May 23	24.5	9.5	0.00
May 24	26.0	9.0	0.00
May 25	27.5	16.0	0.48
May 26	22.0	17.0	0.10
May 27	23.5	14.0	0.12
May 28	26.5	16.0	0.00
May 29	26.0	17.0	0.00
May 30	29.5	12.5	0.00
May 31	26.0	20.0	0.14

June 2018 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
June 1	28.0	20.0	0.00
June 2	25.5	12.5	0.00
June 3	24.5	12.0	2.60
June 4	18.0	12.5	2.00
June 5	15.0	10.5	0.18
June 6	18.5	11.0	0.22
June 7	21.5	11.0	0.00
June 8	22.5	11.0	0.00
June 9	23.5	10.5	0.00
June 10	22.0	8.5	0.00
June 11	23.5	11.0	0.00
June 12	27.5	9.0	0.00
June 13	21.0	14.5	1.16
June 14	17.5	13.5	0.24
June 15	25.0	11.0	0.02
June 16	28.0	12.5	0.00
June 17	30.5	14.0	0.00
June 18	29.0	21.0	0.26
June 19	24.0	13.0	0.00
June 20	28.0	12.0	0.00
June 21	21.0	11.5	0.00
June 22	25.5	8.0	0.00
June 23	22.5	16.0	0.28
June 24	24.0	15.0	0.00
June 25	22.0	12.5	0.00
June 26	25.0	7.0	0.00
June 27	24.5	13.0	0.20
June 28	25.0	18.0	0.00
June 29	31.5	18.0	0.04
June 30	33.0	21.0	0.00

July 2018 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
July 1	34.5	22.5	0.00
July 2	35.5	23.0	0.00
July 3	32.5	20.0	0.00
July 4	34.5	17.0	0.00
July 5	34.5	20.0	0.00
July 6	21.5	17.5	0.00
July 7	29.5	11.0	0.00
July 8	30.5	13.5	0.00
July 9	34.0	16.0	0.00
July 10	28.5	18.0	0.00
July 11	27.0	11.0	0.00
July 12	30.0	14.5	0.00
July 13	30.0	13.0	0.58
July 14	30.0	19.0	0.00
July 15	32.5	19.0	0.00
July 16	34.5	19.0	0.22
July 17	29.0	21.5	0.00
July 18	25.0	13.0	0.00
July 19	30.0	10.0	0.00
July 20	31.5	14.0	0.00
July 21	31.5	18.0	0.00
July 22	24.5	17.0	1.04
July 23	31.0	19.5	3.24
July 24	27.5	22.5	8.46
July 25	25.5	19.0	0.94
July 26	29.5	19.0	0.22
July 27	28.0	16.0	0.42
July 28	26.0	17.5	0.14
July 29	27.5	15.5	0.22
July 30	28.0	15.0	0.00
July 31	28.5	17.5	0.00

August 2018 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
August 1	27.0	21.5	0.10
August 2	28.0	20.0	0.00
August 3	29.0	19.0	0.00
August 4	30.0	18.5	0.00
August 5	31.0	18.5	0.28
August 6	32.0	21.0	2.52
August 7	28.0	20.0	0.00
August 8	25.0	20.0	0.10
August 9	26.5	19.5	0.00
August 10	26.0	13.0	0.00
August 11	27.5	13.0	0.00
August 12	28.5	14.5	0.00
August 13	28.5	16.0	0.00
August 14	27.5	20.0	0.04
August 15	25.5	18.0	0.12
August 16	25.0	15.0	0.00
August 17	25.0	16.5	0.08
August 18	25.0	15.5	0.00
August 19	27.0	12.5	0.00
August 20	27.5	13.0	0.00
August 21	24.0	15.0	3.30
August 22	21.0	18.0	0.00
August 23	25.5	12.0	0.00
August 24	28.0	13.5	0.00
August 25	27.5	15.5	0.12
August 26	27.0	18.0	0.14
August 27	26.0	15.0	0.00
August 28	31.0	20.0	0.00
August 29	29.5	18.5	0.04
August 30	21.0	13.0	0.00
August 31	23.0	10.5	0.00

September 2018 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
September 1	27.0	15.0	0.00	0.0
September 2	27.5	20.5	0.52	0.0
September 3	31.0	19.0	0.00	0.0
September 4	26.0	16.5	0.00	0.0
September 5	32.0	18.0	0.36	0.0
September 6	23.0	19.5	0.00	0.0
September 7	22.5	8.5	0.00	0.0
September 8	17.0	8.5	0.00	0.0
September 9	17.0	4.5	0.00	0.0
September 10	15.5	7.5	0.60	0.0
September 11	18.5	12.0	0.00	0.0
September 12	24.0	10.0	0.00	0.0
September 13	n/a	10.0	n/a	n/a
September 14	28.5	18.0	0.00	0.0
September 15	30.0	17.0	0.00	0.0
September 16	30.0	16.5	0.00	0.0
September 17	30.0	15.5	0.00	0.0
September 18	23.5	16.0	0.00	0.0
September 19	18.0	12.5	0.06	0.0
September 20	18.0	7.0	1.32	0.0
September 21	28.5	12.0	2.70	0.0
September 22	15.0	8.0	0.00	0.0
September 23	16.5	4.0	0.00	0.0
September 24	14.0	6.0	0.66	0.0
September 25	21.5	7.0	0.40	0.0
September 26	24.0	15.0	0.70	0.0
September 27	17.5	5.0	0.00	0.0
September 28	21.0	7.0	0.32	0.0
September 29	16.5	9.5	0.04	0.0
September 30	11.0	5.5	0.04	0.0

October 2018 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
October 1	14.0	6.5	0.66	0.0
October 2	11.5	7.0	0.18	0.0
October 3	19.0	9.5	0.58	0.0
October 4	n/a	n/a	n/a	n/a
October 5	10.5	6.0	0.00	0.0
October 6	10.0	6.0	0.00	0.0
October 7	11.5	7.5	0.00	0.0
October 8	12.0	6.5	0.28	0.0
October 9	28.0	7.0	0.00	0.0
October 10	27.5	18.0	0.42	0.0
October 11	12.0	8.0	0.04	0.0
October 12	11.0	6.5	0.00	0.0
October 13	9.0	3.0	0.00	0.0
October 14	14.5	0.0	0.00	0.0
October 15	12.0	3.5	0.30	0.0
October 16	9.0	2.5	0.00	0.0
October 17	8.5	3.0	0.00	0.0
October 18	7.5	-1.5	0.00	0.0
October 19	17.0	2.5	0.16	0.0
October 20	12.0	8.5	0.00	0.0
October 21	4.0	-0.5	0.00	0.0
October 22	5.5	-1.5	0.00	0.0
October 23	10.5	0.5	0.00	0.0
October 24	9.5	1.5	0.00	0.0
October 25	4.5	0.0	0.00	0.0
October 26	5.0	-4.0	0.00	0.0
October 27	6.0	-1.0	1.10	7.0
October 28	3.5	-1.0	0.46	4.0
October 29	5.5	-1.0	0.00	0.0
October 30	7.0	0.5	0.20	0.0
October 31	5.0	-1.0	0.96	0.0

November 2018 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
November 1	8.0	2.5	1.40	0.0
November 2	5.0	2.0	0.20	0.0
November 3	5.0	3.0	0.18	0.0
November 4	7.5	0.5	0.00	0.0
November 5	6.0	1.5	0.06	0.0
November 6	13.0	2.5	0.62	0.0
November 7	11.5	8.0	0.00	0.0
November 8	8.0	2.0	0.00	0.0
November 9	3.5	-3.0	0.88	10.0
November 10	2.5	0.0	0.00	0.0
November 11	0.0	-5.5	0.06	2.0
November 12	5.5	-4.5	0.72	7.0
November 13	2.0	-2.0	0.00	0.0
November 14	-7.0	-11.0	0.00	0.0
November 15	-4.5	-13.0	0.60	4.0
November 16	0.5	-7.5	0.32	3.0
November 17	1.5	-4.5	0.08	2.0
November 18	-2.0	-16.0	0.06	1.0
November 19	0.5	-5.0	0.18	4.2
November 20	-4.0	-7.0	0.28	6.0
November 21	-3.0	-9.5	0.00	0.0
November 22	-9.5	-17.5	0.00	0.0
November 23	-3.0	-21.0	0.00	0.0
November 24	1.5	-11.5	0.80	0.0
November 25	3.5	-1.0	0.00	0.0
November 26	2.5	0.5	1.66	2.0
November 27	1.5	-0.5	0.58	6.0
November 28	2.5	0.0	0.00	0.0
November 29	2.5	-0.5	0.00	0.0
November 30	0.5	-1.5	0.00	0.0

December 2018 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
December 1	3.0	-5.0	0.20	1.0
December 2	2.0	-2.0	1.10	3.0
December 3	1.0	-1.0	0.20	3.0
December 4	-4.5	-6.5	0.00	0.0
December 5	-3.5	-8.0	0.12	3.0
December 6	1.0	-5.5	0.00	0.0
December 7	-11.0	-13.0	0.00	0.0
December 8	-2.5	-19.0	0.04	1.0
December 9	0.0	-12.0	0.00	0.0
December 10	-5.5	-11.5	0.00	0.0
December 11	-6.5	-14.0	0.12	2.0
December 12	-5.0	-9.5	0.00	0.0
December 13	-5.5	-15.0	0.00	0.0
December 14	2.0	-9.5	0.74	0.0
December 15	4.0	-0.5	0.00	0.0
December 16	1.5	-6.0	0.00	0.0
December 17	1.0	-1.0	0.00	0.0
December 18	-6.0	-9.5	0.00	0.0
December 19	-1.0	-13.0	0.00	0.0
December 20	3.0	-9.0	2.00	0.0
December 21	5.0	0.0	0.74	2.0
December 22	-3.0	-4.5	0.00	0.0
December 23	-7.5	-12.5	0.00	0.0
December 24	-7.0	-10.0	0.06	1.0
December 25	-11.0	-17.0	0.04	1.0
December 26	-5.0	-16.0	0.08	1.0
December 27	-4.0	-17.0	0.30	2.0
December 28	6.5	-11.0	0.88	1.0
December 29	-5.5	-10.0	0.00	0.0
December 30	-5.5	-13.5	0.04	1.0
December 31	1.0	-9.0	0.68	3.0

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Weather Station Details

Years	Station	Coordinates
1889–2024	Ottawa CDA	location