Ottawa Weather in 1978

Historical record of Ottawa, Ontario weather for the year 1978 based on NOAA data.

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1978 Ottawa Weather Extremes
Highest temperature	34.0 °C	July 20
Lowest temperature	-26.0 °C	February 5
Highest daily low	21.5 °C	July 21
Lowest daily high	-15.0 °C	February 5
Most daily precipitation	3.4 cm	June 12
Most daily snow	19.6 cm	December 3
Total annual precipitation	80.8 cm	-
Total annual snow	226.2 cm	-

What was the hottest temperature in Ottawa in 1978?

The highest temperature recorded in Ottawa, Ontario in 1978 was 34.0 °C which happened on July 20.

Highest Temperatures: All-Time By Year

Highest Temperatures in Ottawa in 1978

Rank	Temperature	Date
1	34.0 °C	Jul 20
2	33.0 °C	Aug 15
2	33.0 °C	Jul 7
4	32.5 °C	May 28
4	32.5 °C	May 27
6	31.5 °C	Aug 14
6	31.5 °C	May 29
8	31.0 °C	May 30
9	30.5 °C	Aug 13
9	30.5 °C	Jul 6
9	30.5 °C	Jul 5

What was the coldest temperature in Ottawa in 1978?

The lowest temperature recorded in Ottawa, Ontario in 1978 was -26.0 °C which happened 2 different times.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Ottawa in 1978

Rank	Temperature	Date
1	-26.0 °C	February 5
1	-26.0 °C	February 4
3	-24.5 °C	January 4
4	-24.0 °C	January 16
5	-23.5 °C	February 3
5	-23.5 °C	January 17
7	-21.5 °C	February 15
7	-21.5 °C	January 10
9	-21.0 °C	February 20
9	-21.0 °C	January 31
9	-21.0 °C	January 22
9	-21.0 °C	January 19

January 1978 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
January 1	-11.0	-19.0	0.30	7.6
January 2	-11.0	-13.5	0.06	0.6
January 3	-10.0	-18.5	0.00	0.0
January 4	-11.5	-24.5	0.10	2.0
January 5	-8.0	-16.0	0.08	2.0
January 6	-13.5	-19.5	0.12	5.2
January 7	-5.0	-15.5	0.28	13.0
January 8	2.0	-13.0	2.92	4.2
January 9	-10.0	-18.0	0.58	10.6
January 10	-14.0	-21.5	0.12	5.6
January 11	-10.5	-17.0	0.10	1.0
January 12	-14.0	-20.5	0.00	0.0
January 13	-11.5	-20.0	0.14	1.4
January 14	-11.5	-14.5	0.20	3.2
January 15	-14.5	-15.5	0.04	0.4
January 16	-13.5	-24.0	0.00	0.0
January 17	-8.5	-23.5	0.50	8.0
January 18	-6.0	-13.0	0.12	3.6
January 19	-10.5	-21.0	0.00	0.0
January 20	-10.0	-16.0	0.30	4.0
January 21	-7.0	-11.5	0.00	0.0
January 22	-4.5	-21.0	0.00	0.0
January 23	-3.5	-7.5	0.00	0.0
January 24	0.0	-8.0	0.52	5.2
January 25	1.5	-3.5	3.32	0.0
January 26	4.5	-4.5	0.74	2.2
January 27	-7.0	-9.5	0.08	1.0
January 28	-10.0	-13.0	0.00	0.0
January 29	-11.5	-17.0	0.04	0.4
January 30	-10.5	-16.0	0.00	0.0
January 31	-10.5	-21.0	0.04	0.4

February 1978 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
February 1	-10.0	-17.5	0.00	0.0
February 2	-11.0	-18.0	0.00	0.0
February 3	-13.5	-23.5	0.00	0.0
February 4	-14.5	-26.0	0.00	0.0
February 5	-15.0	-26.0	0.00	0.0
February 6	-5.0	-16.5	0.04	0.4
February 7	-3.0	-8.0	0.06	1.0
February 8	-4.0	-10.5	0.00	0.0
February 9	-8.0	-15.0	0.00	0.0
February 10	-9.5	-18.5	0.00	0.0
February 11	-6.0	-18.0	0.00	0.0
February 12	-5.0	-10.0	0.04	1.0
February 13	-8.5	-14.0	0.00	0.0
February 14	-7.0	-19.0	0.00	0.0
February 15	-5.5	-21.5	0.00	0.0
February 16	-5.0	-17.5	0.02	1.0
February 17	-1.0	-10.0	0.00	0.0
February 18	-6.5	-18.0	0.04	0.8
February 19	-9.5	-16.5	0.00	0.0
February 20	-5.0	-21.0	0.00	0.0
February 21	-7.5	-18.0	0.00	0.0
February 22	-4.5	-13.0	0.02	0.2
February 23	-0.5	-10.0	0.04	0.6
February 24	-1.0	-7.5	0.00	0.0
February 25	-3.5	-15.0	0.00	0.0
February 26	-5.5	-13.0	0.00	0.0
February 27	-6.0	-14.0	0.00	0.0
February 28	-5.0	-18.5	0.00	0.0

March 1978 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
March 1	-7.0	-16.0	0.00	0.0
March 2	-5.5	-20.5	0.00	0.0
March 3	-7.5	-18.0	0.14	1.6
March 4	-8.5	-15.5	0.00	0.0
March 5	-7.5	-19.0	0.00	0.0
March 6	-3.5	-14.0	0.00	0.0
March 7	-4.0	-15.0	0.00	0.0
March 8	-1.0	-18.0	0.00	0.0
March 9	1.0	-15.0	0.00	0.0
March 10	4.5	-3.0	0.00	0.0
March 11	3.5	-5.0	0.00	0.0
March 12	2.0	-1.0	0.00	0.0
March 13	5.0	-11.5	0.00	0.0
March 14	5.5	-2.5	1.50	0.2
March 15	0.5	-5.0	0.00	0.0
March 16	-4.0	-11.0	0.00	0.0
March 17	-2.5	-12.0	0.00	0.0
March 18	1.5	-10.0	0.08	1.6
March 19	4.0	-4.0	0.00	0.0
March 20	-3.0	-14.5	0.78	5.4
March 21	0.5	-7.5	1.70	2.6
March 22	3.0	-2.5	0.50	4.4
March 23	3.5	-2.5	0.00	0.0
March 24	-4.0	-10.0	0.00	0.0
March 25	-1.0	-14.5	0.24	3.4
March 26	0.0	-8.0	1.16	10.2
March 27	2.5	-4.0	0.42	0.6
March 28	4.5	0.0	0.00	0.0
March 29	3.0	-0.5	0.00	0.0
March 30	3.5	-6.0	0.00	0.0
March 31	6.0	-0.5	0.74	8.4

April 1978 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
April 1	9.5	-1.0	0.54	0.0
April 2	-0.5	-6.0	0.00	0.0
April 3	-2.0	-8.5	0.00	0.0
April 4	1.5	-4.0	1.30	0.0
April 5	4.5	-0.5	0.00	0.0
April 6	6.5	-4.5	0.22	2.0
April 7	3.0	-1.5	0.08	0.0
April 8	1.5	-4.5	0.00	0.0
April 9	3.0	-7.5	0.00	0.0
April 10	3.0	-8.5	1.88	0.0
April 11	4.0	0.0	0.92	0.0
April 12	7.0	1.5	0.06	0.0
April 13	10.5	1.0	0.00	0.0
April 14	5.5	1.0	0.00	0.0
April 15	5.5	-1.0	0.00	0.0
April 16	10.0	0.0	0.00	0.0
April 17	10.5	2.0	0.00	0.0
April 18	11.5	-1.0	0.00	0.0
April 19	9.5	2.5	0.90	0.0
April 20	6.0	3.0	1.42	0.0
April 21	10.0	2.0	0.00	0.0
April 22	10.0	-0.5	0.00	0.0
April 23	12.5	-1.5	0.00	0.0
April 24	14.5	1.5	0.00	0.0
April 25	15.0	4.5	0.00	0.0
April 26	16.5	2.5	0.00	0.0
April 27	17.0	1.5	0.00	0.0
April 28	17.0	3.5	0.00	0.0
April 29	14.5	3.5	0.00	0.0
April 30	3.5	-5.0	0.00	0.0

May 1978 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
May 1	2.5	-3.0	0.00
May 2	10.5	-0.5	0.00
May 3	7.0	-0.5	0.00
May 4	13.0	-1.0	0.00
May 5	17.0	4.5	0.00
May 6	17.5	4.5	0.00
May 7	21.0	5.5	0.00
May 8	23.0	5.0	0.84
May 9	20.0	10.5	0.26
May 10	13.5	9.0	0.00
May 11	19.0	2.0	0.00
May 12	20.5	10.0	0.40
May 13	22.0	13.0	0.06
May 14	20.5	12.5	0.48
May 15	15.0	10.0	0.26
May 16	21.5	11.0	0.02
May 17	16.5	13.0	0.92
May 18	20.5	10.0	0.00
May 19	27.5	9.5	0.00
May 20	27.0	12.5	0.40
May 21	20.0	8.0	0.00
May 22	21.5	9.0	0.00
May 23	26.5	7.5	0.00
May 24	27.5	10.0	0.00
May 25	29.5	13.0	0.00
May 26	30.0	14.0	0.00
May 27	32.5	14.5	0.00
May 28	32.5	16.0	0.00
May 29	31.5	16.0	0.00
May 30	31.0	16.5	0.00
May 31	26.0	17.0	1.74

June 1978 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
June 1	19.5	14.0	0.04
June 2	26.0	14.5	0.00
June 3	18.5	11.5	0.00
June 4	19.5	9.5	1.30
June 5	16.0	9.0	0.02
June 6	21.5	5.5	0.00
June 7	24.5	8.0	0.12
June 8	21.5	15.0	0.02
June 9	23.0	11.0	1.08
June 10	23.5	4.0	0.00
June 11	27.5	11.5	0.00
June 12	30.0	17.5	3.40
June 13	12.5	10.5	0.46
June 14	16.5	5.5	0.00
June 15	21.5	7.0	0.00
June 16	24.0	7.5	0.00
June 17	25.0	15.5	0.00
June 18	26.0	18.0	1.14
June 19	21.5	12.0	0.30
June 20	28.0	14.5	0.00
June 21	25.5	15.5	0.26
June 22	22.5	15.5	0.04
June 23	19.5	12.5	0.00
June 24	26.0	9.0	0.00
June 25	27.0	14.0	0.00
June 26	24.0	15.0	0.22
June 27	29.0	19.0	0.18
June 28	27.0	19.0	0.00
June 29	28.0	18.0	0.00
June 30	24.0	12.0	0.00

July 1978 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
July 1	23.0	12.0	0.00
July 2	24.0	9.5	0.00
July 3	25.0	9.5	0.00
July 4	27.0	12.0	0.00
July 5	30.5	13.0	0.00
July 6	30.5	16.5	0.00
July 7	33.0	21.0	0.00
July 8	28.5	19.0	2.24
July 9	24.5	17.5	0.00
July 10	24.0	17.5	0.00
July 11	21.5	9.5	0.00
July 12	27.5	13.5	0.00
July 13	27.5	13.0	0.20
July 14	26.0	16.5	0.00
July 15	30.0	16.0	0.00
July 16	25.5	17.0	0.00
July 17	27.5	14.5	0.00
July 18	29.5	11.5	0.10
July 19	28.0	18.5	0.04
July 20	34.0	20.0	0.00
July 21	27.5	21.5	0.00
July 22	28.0	20.5	0.22
July 23	29.5	21.0	0.00
July 24	27.5	13.0	0.00
July 25	29.5	14.0	0.00
July 26	26.5	18.5	0.40
July 27	29.0	20.0	0.08
July 28	24.0	14.5	0.00
July 29	19.0	13.0	0.94
July 30	20.5	9.5	0.00
July 31	24.5	8.5	0.14

August 1978 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
August 1	27.5	15.5	0.00
August 2	30.0	16.0	2.10
August 3	22.5	19.5	0.22
August 4	23.5	14.5	0.00
August 5	26.0	11.0	0.00
August 6	28.5	13.0	0.00
August 7	28.0	20.0	0.08
August 8	26.5	19.0	1.02
August 9	26.5	19.5	0.00
August 10	24.5	15.0	0.00
August 11	27.0	11.0	0.00
August 12	27.5	15.5	0.00
August 13	30.5	17.0	0.00
August 14	31.5	19.5	0.00
August 15	33.0	19.5	0.00
August 16	29.5	20.0	0.58
August 17	28.0	20.5	0.02
August 18	25.5	16.5	0.04
August 19	27.0	14.5	1.04
August 20	22.0	16.5	0.00
August 21	24.5	10.0	0.00
August 22	28.5	10.5	0.00
August 23	22.0	17.5	2.52
August 24	17.5	10.5	0.06
August 25	21.0	9.5	0.00
August 26	23.5	12.0	0.00
August 27	22.0	8.0	0.04
August 28	21.5	11.0	1.96
August 29	23.5	14.0	0.02
August 30	25.0	12.0	0.00
August 31	21.0	13.0	0.00

September 1978 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
September 1	23.0	7.5	0.00
September 2	27.5	11.0	0.10
September 3	22.5	16.0	0.38
September 4	23.0	9.0	0.00
September 5	20.0	13.5	0.04
September 6	27.5	12.0	0.12
September 7	17.0	11.5	0.00
September 8	19.0	5.5	0.00
September 9	15.0	8.0	0.02
September 10	13.5	5.0	0.78
September 11	19.5	10.5	0.48
September 12	16.0	9.5	0.00
September 13	17.0	5.0	0.00
September 14	20.0	5.0	0.18
September 15	23.0	13.5	0.06
September 16	17.0	12.5	0.00
September 17	14.0	3.5	0.00
September 18	13.0	3.5	0.16
September 19	20.0	7.0	0.00
September 20	20.0	6.5	0.26
September 21	20.5	15.0	0.32
September 22	15.5	9.0	0.00
September 23	17.5	2.0	0.00
September 24	21.5	4.5	0.00
September 25	11.5	7.5	0.00
September 26	14.5	-1.0	0.02
September 27	20.5	10.0	0.32
September 28	13.5	6.5	0.00
September 29	16.5	0.0	0.02
September 30	19.0	8.0	1.00

October 1978 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)
October 1	19.5	12.5	0.02
October 2	13.5	9.0	0.00
October 3	13.0	3.5	0.06
October 4	14.5	7.5	0.84
October 5	18.0	7.5	0.20
October 6	18.5	11.0	0.12
October 7	7.5	5.5	0.12
October 8	5.5	1.5	0.00
October 9	12.5	-3.5	0.00
October 10	18.0	9.0	0.00
October 11	22.5	7.5	0.02
October 12	19.0	9.5	0.64
October 13	12.5	10.0	0.26
October 14	4.5	3.5	1.26
October 15	4.0	0.5	0.00
October 16	5.5	-3.5	0.00
October 17	7.0	-4.5	0.00
October 18	10.0	-1.0	0.20
October 19	6.5	3.5	0.00
October 20	11.0	-0.5	0.00
October 21	19.0	4.0	0.00
October 22	21.0	10.0	0.18
October 23	6.5	3.0	0.00
October 24	5.0	-5.0	0.00
October 25	13.0	0.0	0.76
October 26	11.0	9.5	0.74
October 27	9.5	3.5	0.12
October 28	11.0	3.0	0.00
October 29	6.0	-1.0	0.00
October 30	10.0	-4.5	0.00
October 31	15.5	4.0	0.00

November 1978 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
November 1	10.5	-2.0	0.00	0.0
November 2	14.5	2.5	0.00	0.0
November 3	15.0	-1.0	0.02	0.0
November 4	14.5	1.5	0.00	0.0
November 5	14.0	6.5	0.00	0.0
November 6	16.0	6.0	0.10	0.0
November 7	7.0	4.0	0.00	0.0
November 8	9.0	-6.0	0.00	0.0
November 9	14.0	2.0	0.00	0.0
November 10	7.5	6.5	0.00	0.0
November 11	9.5	1.0	0.00	0.0
November 12	1.0	-3.5	0.00	0.0
November 13	10.5	-7.0	2.02	0.0
November 14	14.5	0.5	0.06	0.0
November 15	6.0	2.0	0.00	0.0
November 16	7.0	-1.0	0.00	0.0
November 17	13.5	-4.0	2.26	0.0
November 18	8.5	1.5	0.00	0.0
November 19	7.5	0.5	0.00	0.0
November 20	-7.5	-10.5	0.00	0.0
November 21	-5.5	-12.0	0.00	0.0
November 22	-2.5	-13.0	0.00	0.0
November 23	3.0	-7.0	0.60	5.6
November 24	0.5	-3.5	0.00	0.0
November 25	-4.0	-6.5	0.00	0.0
November 26	-9.0	-13.5	0.00	0.0
November 27	-7.5	-14.0	1.02	10.2
November 28	-6.5	-13.5	0.12	1.0
November 29	3.5	-16.5	0.00	0.0
November 30	3.5	-3.0	0.00	0.0

December 1978 Ottawa Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
December 1	-1.0	-8.0	0.68	8.0
December 2	-5.5	-9.5	0.00	0.0
December 3	-0.5	-20.0	2.26	19.6
December 4	7.0	-14.0	0.50	0.0
December 5	3.5	-3.5	0.04	0.4
December 6	4.5	1.0	0.00	0.0
December 7	-1.5	-5.0	0.08	0.4
December 8	-1.0	-4.0	0.16	2.0
December 9	-6.0	-8.0	0.04	0.8
December 10	-14.5	-18.5	0.02	0.2
December 11	-5.5	-18.0	0.26	3.0
December 12	1.0	-14.5	0.18	2.4
December 13	2.5	-4.0	0.26	1.2
December 14	-5.5	-11.0	0.08	1.6
December 15	2.5	-10.0	0.12	1.8
December 16	3.0	-2.0	1.48	11.8
December 17	0.5	-4.0	0.08	0.8
December 18	-12.5	-16.5	0.00	0.0
December 19	-10.0	-17.5	0.00	0.0
December 20	-7.0	-17.0	0.62	5.0
December 21	-5.0	-14.0	0.02	0.2
December 22	0.5	-18.0	0.06	0.6
December 23	2.0	-9.5	0.00	0.0
December 24	-3.0	-13.0	0.80	8.0
December 25	-2.0	-5.5	1.20	11.2
December 26	-2.5	-4.0	0.26	2.6
December 27	-9.0	-13.5	0.00	0.0
December 28	-11.5	-17.5	0.00	0.0
December 29	-11.5	-18.5	0.00	0.0
December 30	-6.5	-18.5	0.10	0.8
December 31	6.5	-8.5	1.98	0.0

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Weather Station Details

Years	Station	Coordinates
1889–2024	Ottawa CDA	location