Thunder Bay Weather in 1970

Historical record of Thunder Bay, Ontario weather for the year 1970 based on NOAA data.

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1970 Thunder Bay Weather Extremes
Highest temperature	34.4 °C	August 13
Lowest temperature	-40.0 °C	February 3
Highest daily low	16.7 °C	July 30
Lowest daily high	-22.8 °C	February 3
Most daily precipitation	3.5 cm	October 8
Most daily snow	21.8 cm	April 20
Total annual precipitation	93.1 cm	-
Total annual snow	306.9 cm	-

What was the hottest temperature in Thunder Bay in 1970?

The highest temperature recorded in Thunder Bay, Ontario in 1970 was 34.4 °C which happened on August 13.

Highest Temperatures: All-Time By Year

Highest Temperatures in Thunder Bay in 1970

Rank	Temperature	Date
1	34.4 °C	Aug 13
2	33.9 °C	Jun 6
3	33.3 °C	Jul 26
4	32.2 °C	Jul 30
4	32.2 °C	Jun 29
6	31.7 °C	Jul 25
6	31.7 °C	Jul 1
6	31.7 °C	Jun 17
9	31.1 °C	Jul 2
10	30.6 °C	Aug 14
10	30.6 °C	Aug 9
10	30.6 °C	Aug 6
10	30.6 °C	Jul 27
10	30.6 °C	Jul 16

What was the coldest temperature in Thunder Bay in 1970?

The lowest temperature recorded in Thunder Bay, Ontario in 1970 was -40.0 °C which happened on Feb 3.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Thunder Bay in 1970

Rank	Temperature	Date
1	-40.0 °C	February 3
2	-33.9 °C	February 4
3	-33.3 °C	January 19
4	-32.2 °C	January 22
4	-32.2 °C	January 20
4	-32.2 °C	January 18
4	-32.2 °C	January 13
8	-31.7 °C	January 21
9	-31.1 °C	December 21
9	-31.1 °C	February 14
9	-31.1 °C	January 23
9	-31.1 °C	January 17

January 1970 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
January 1	-4.4	-11.7	0.58	14.7
January 2	-6.7	-13.3	0.20	2.8
January 3	-8.9	-21.7	0.00	0.0
January 4	-10.6	-20.6	0.00	0.3
January 5	-15.6	-26.1	0.00	0.0
January 6	-15.0	-23.3	0.00	0.0
January 7	-16.1	-25.6	0.00	0.0
January 8	-8.9	-21.1	0.00	0.0
January 9	-11.1	-23.9	0.00	0.0
January 10	-8.3	-25.0	0.13	3.0
January 11	-2.2	-12.2	0.36	5.6
January 12	-8.9	-25.0	0.00	0.0
January 13	-21.1	-32.2	0.00	0.0
January 14	-16.1	-29.4	0.10	1.8
January 15	-6.7	-17.8	1.12	16.0
January 16	-6.7	-27.2	0.08	1.0
January 17	-22.2	-31.1	0.00	0.0
January 18	-22.2	-32.2	0.00	0.0
January 19	-20.6	-33.3	0.00	0.0
January 20	-22.2	-32.2	0.00	0.0
January 21	-16.7	-31.7	0.00	0.0
January 22	-15.0	-32.2	0.30	6.1
January 23	-9.4	-31.1	0.00	0.0
January 24	-5.6	-17.8	0.20	2.0
January 25	-4.4	-20.0	0.00	0.0
January 26	-3.9	-8.9	0.56	9.7
January 27	-2.2	-15.0	0.00	0.0
January 28	0.6	-12.8	0.76	10.7
January 29	-12.2	-25.0	0.00	0.0
January 30	-5.0	-17.2	0.00	0.0
January 31	2.8	-13.9	0.00	0.0

February 1970 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
February 1	0.0	-17.8	0.10	1.0
February 2	-17.8	-30.0	0.00	0.0
February 3	-22.8	-40.0	0.00	0.0
February 4	-13.9	-33.9	0.20	2.0
February 5	-7.8	-17.8	0.00	0.0
February 6	-5.6	-23.9	0.00	0.0
February 7	-2.2	-21.1	0.00	0.0
February 8	-6.1	-25.6	0.00	0.0
February 9	-2.8	-23.9	0.25	3.6
February 10	-2.2	-20.0	0.00	0.5
February 11	-8.9	-23.9	0.00	0.0
February 12	-15.0	-23.9	0.00	0.0
February 13	-16.7	-28.3	0.00	0.0
February 14	-15.6	-31.1	0.00	0.0
February 15	-12.2	-23.3	0.05	0.5
February 16	-11.7	-28.9	0.58	7.4
February 17	-7.8	-18.9	0.25	2.5
February 18	-7.8	-21.1	0.00	0.0
February 19	-12.2	-28.9	0.00	0.0
February 20	-8.3	-23.3	0.00	0.0
February 21	3.9	-10.6	0.00	0.0
February 22	2.2	-15.0	0.00	0.0
February 23	1.7	-14.4	0.00	0.0
February 24	-4.4	-19.4	0.08	1.5
February 25	-11.7	-25.6	0.00	0.0
February 26	-6.7	-22.8	0.25	5.3
February 27	-4.4	-23.9	0.00	0.0
February 28	-3.9	-25.0	0.00	0.0

March 1970 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
March 1	-2.2	-17.2	0.05	0.8
March 2	-2.2	-16.1	0.05	0.8
March 3	0.6	-3.3	2.51	8.4
March 4	1.7	-10.0	0.00	0.0
March 5	-4.4	-19.4	0.15	1.8
March 6	-5.0	-18.9	0.00	0.0
March 7	-11.7	-22.8	0.00	0.0
March 8	-2.2	-21.1	0.00	0.0
March 9	-3.3	-21.1	0.00	0.0
March 10	-3.3	-23.3	0.00	0.0
March 11	-0.6	-15.6	0.00	0.0
March 12	-1.7	-17.2	0.00	0.0
March 13	-1.7	-13.9	0.00	0.0
March 14	-4.4	-18.9	0.00	0.0
March 15	0.6	-18.3	0.00	0.0
March 16	5.0	-17.8	0.00	0.0
March 17	5.0	-13.9	0.00	0.0
March 18	8.3	-12.2	0.00	0.0
March 19	4.4	-10.0	0.00	0.0
March 20	8.3	-7.8	0.00	0.0
March 21	5.0	-5.0	0.00	0.0
March 22	2.8	-6.1	0.00	0.0
March 23	1.1	-6.1	0.00	0.0
March 24	6.1	-7.8	0.00	0.0
March 25	1.7	-8.9	0.00	0.0
March 26	1.7	-8.9	0.18	3.0
March 27	-6.1	-19.4	0.51	10.2
March 28	-6.7	-22.8	0.00	0.0
March 29	-3.9	-23.3	0.10	1.0
March 30	2.2	-9.4	0.18	2.0
March 31	1.7	-12.8	0.00	0.0

April 1970 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
April 1	0.0	-13.9	0.00	0.0
April 2	3.3	-16.7	0.00	0.0
April 3	6.1	-11.1	0.00	0.0
April 4	2.8	-8.9	0.00	0.0
April 5	3.3	-6.1	0.81	3.3
April 6	6.1	-5.6	0.00	0.0
April 7	13.9	-6.1	0.00	0.0
April 8	12.8	-2.8	0.00	0.0
April 9	-0.6	-6.1	0.00	0.0
April 10	4.4	-10.0	0.00	0.0
April 11	3.9	-9.4	0.00	0.0
April 12	3.9	-8.9	0.00	0.0
April 13	7.8	-2.8	0.00	0.0
April 14	8.3	-5.6	0.00	0.0
April 15	5.6	-1.1	0.30	0.0
April 16	12.8	1.1	0.58	0.0
April 17	6.7	-1.1	0.05	0.0
April 18	5.6	-1.7	0.00	0.0
April 19	4.4	-1.7	0.13	1.3
April 20	1.7	-0.6	2.36	21.8
April 21	5.0	0.0	0.10	0.3
April 22	8.3	-2.8	1.83	16.3
April 23	6.1	0.0	0.48	0.8
April 24	11.1	-2.2	0.00	0.0
April 25	17.2	-3.9	0.00	0.0
April 26	19.4	3.3	0.00	0.0
April 27	12.2	3.3	0.43	0.0
April 28	10.0	4.4	0.61	0.0
April 29	10.6	3.9	2.84	0.0
April 30	17.8	3.9	0.00	0.0

May 1970 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
May 1	8.3	-0.6	1.17	3.3
May 2	8.3	-0.6	0.00	0.0
May 3	15.6	1.1	0.18	0.0
May 4	11.7	2.2	0.08	0.0
May 5	8.9	-2.2	0.00	0.0
May 6	9.4	-5.6	0.03	0.0
May 7	14.4	1.1	0.15	0.0
May 8	13.3	0.6	1.35	0.0
May 9	5.6	2.2	1.73	0.8
May 10	3.3	-1.1	1.04	8.1
May 11	5.6	-0.6	0.08	0.0
May 12	4.4	1.1	0.18	0.0
May 13	11.1	-2.2	0.00	0.0
May 14	9.4	-0.6	0.00	0.0
May 15	7.8	3.3	1.40	0.0
May 16	9.4	2.2	0.33	0.0
May 17	20.6	0.6	0.00	0.0
May 18	29.4	6.7	0.00	0.0
May 19	16.1	3.3	0.00	0.0
May 20	6.1	2.2	3.30	0.0
May 21	13.9	5.0	0.05	0.0
May 22	18.3	3.9	0.00	0.0
May 23	18.9	2.2	0.00	0.0
May 24	10.0	5.0	0.13	0.0
May 25	15.6	3.3	1.32	0.0
May 26	8.3	-1.1	0.00	0.0
May 27	9.4	-1.7	0.00	0.0
May 28	12.2	-1.1	0.05	0.0
May 29	12.2	5.0	1.75	0.0
May 30	21.1	8.9	0.00	0.0
May 31	18.9	6.1	0.08	0.0

June 1970 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
June 1	17.2	7.8	0.00
June 2	19.4	3.3	0.00
June 3	21.7	3.3	0.00
June 4	25.6	8.9	0.00
June 5	26.7	6.7	0.00
June 6	33.9	7.2	0.08
June 7	22.8	9.4	0.00
June 8	19.4	6.1	0.00
June 9	28.3	8.3	0.00
June 10	20.0	11.1	1.47
June 11	16.7	10.0	0.51
June 12	17.8	7.8	0.00
June 13	17.8	6.7	0.00
June 14	19.4	8.3	0.00
June 15	18.3	5.6	0.00
June 16	14.4	8.3	1.04
June 17	31.7	8.3	0.81
June 18	16.1	4.4	0.15
June 19	18.9	3.9	0.00
June 20	18.3	1.7	0.00
June 21	26.7	3.9	0.00
June 22	23.3	6.1	0.00
June 23	26.7	7.8	0.28
June 24	19.4	7.8	0.00
June 25	13.9	5.6	0.00
June 26	18.9	8.3	0.00
June 27	23.3	6.7	0.00
June 28	17.2	6.1	0.00
June 29	32.2	11.7	0.00
June 30	20.6	14.4	0.46

July 1970 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
July 1	31.7	14.4	0.00
July 2	31.1	14.4	0.00
July 3	21.1	11.7	0.84
July 4	24.4	10.6	0.00
July 5	27.8	8.3	0.00
July 6	27.2	11.7	0.00
July 7	29.4	13.3	3.48
July 8	24.4	11.7	0.15
July 9	28.3	8.9	0.00
July 10	30.0	12.2	1.19
July 11	25.0	15.0	0.00
July 12	21.7	14.4	0.28
July 13	22.8	14.4	0.61
July 14	21.7	13.9	0.03
July 15	23.3	14.4	1.07
July 16	30.6	13.3	0.00
July 17	22.8	10.0	0.00
July 18	16.1	6.1	0.56
July 19	18.3	8.9	0.91
July 20	24.4	7.8	0.00
July 21	27.2	9.4	0.00
July 22	26.1	8.3	0.00
July 23	26.1	8.3	0.00
July 24	24.4	9.4	0.03
July 25	31.7	11.1	0.00
July 26	33.3	16.1	0.00
July 27	30.6	16.7	0.00
July 28	26.1	12.8	0.00
July 29	23.9	14.4	0.00
July 30	32.2	16.7	0.00
July 31	29.4	13.9	0.20

August 1970 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
August 1	28.3	12.8	0.00
August 2	25.6	12.2	0.00
August 3	19.4	7.2	0.00
August 4	24.4	4.4	0.00
August 5	30.0	8.3	0.00
August 6	30.6	14.4	0.00
August 7	30.0	12.8	0.00
August 8	28.9	11.7	0.00
August 9	30.6	13.3	0.00
August 10	29.4	12.8	0.00
August 11	27.8	13.9	0.00
August 12	25.6	12.2	0.56
August 13	34.4	12.8	0.00
August 14	30.6	16.1	0.03
August 15	28.9	14.4	0.56
August 16	23.9	11.7	0.08
August 17	19.4	11.7	0.00
August 18	27.2	10.0	0.00
August 19	28.9	11.7	0.00
August 20	22.2	7.8	0.00
August 21	22.8	5.6	0.00
August 22	21.1	13.9	0.71
August 23	23.3	12.8	0.00
August 24	26.7	10.6	0.00
August 25	22.8	8.3	0.23
August 26	20.6	10.0	0.00
August 27	21.7	12.2	0.76
August 28	22.2	7.2	0.00
August 29	20.0	3.3	0.00
August 30	19.4	6.1	1.24
August 31	22.2	3.9	0.00

September 1970 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
September 1	22.8	3.3	0.00
September 2	17.2	12.2	1.85
September 3	22.8	12.8	0.08
September 4	24.4	11.7	0.00
September 5	20.0	7.8	0.00
September 6	25.0	13.3	0.00
September 7	27.2	16.1	0.46
September 8	23.3	7.2	0.00
September 9	23.9	10.0	2.59
September 10	16.1	6.1	0.76
September 11	17.8	2.2	0.00
September 12	15.6	3.3	0.13
September 13	11.1	-0.6	0.00
September 14	10.6	-1.1	0.00
September 15	8.9	3.9	0.61
September 16	16.1	3.3	0.00
September 17	18.9	3.3	0.00
September 18	20.0	1.7	0.00
September 19	23.9	8.9	0.00
September 20	26.1	8.3	0.00
September 21	28.3	13.9	0.81
September 22	15.6	3.9	0.00
September 23	14.4	0.6	0.00
September 24	12.2	7.2	0.76
September 25	12.2	6.1	0.58
September 26	12.8	2.8	0.00
September 27	11.1	1.1	0.00
September 28	12.2	-2.2	0.00
September 29	17.2	3.3	0.00
September 30	11.1	-1.1	0.00

October 1970 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
October 1	17.8	-0.6	0.00
October 2	13.9	3.3	0.05
October 3	5.6	0.0	0.00
October 4	11.7	-3.9	0.00
October 5	14.4	-1.1	0.00
October 6	19.4	3.9	0.15
October 7	17.2	4.4	1.80
October 8	6.1	3.3	3.51
October 9	15.0	3.9	1.35
October 10	11.1	-3.3	0.00
October 11	10.0	-5.0	0.28
October 12	16.7	3.3	0.03
October 13	11.1	3.9	0.05
October 14	7.8	0.6	0.00
October 15	4.4	-5.0	0.00
October 16	14.4	-2.8	0.00
October 17	13.9	-5.0	0.00
October 18	9.4	-4.4	0.00
October 19	14.4	-6.7	0.00
October 20	13.9	-2.2	0.00
October 21	11.7	0.0	0.03
October 22	10.0	0.0	0.03
October 23	11.1	7.8	0.00
October 24	11.1	9.4	0.71
October 25	12.2	8.9	0.13
October 26	11.1	8.3	0.89
October 27	11.1	7.2	2.97
October 28	10.0	-0.6	3.05
October 29	8.9	-2.8	0.00
October 30	8.9	-2.2	0.46
October 31	6.7	2.2	1.19

November 1970 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
November 1	6.7	0.6	1.35	0.0
November 2	8.3	1.7	0.13	0.0
November 3	8.3	-0.6	0.00	0.0
November 4	8.3	-2.8	0.00	0.0
November 5	9.4	-2.8	0.00	0.0
November 6	7.2	-5.0	0.00	0.0
November 7	6.7	-7.8	0.00	0.0
November 8	2.8	-2.8	0.00	0.0
November 9	6.1	0.6	1.91	0.0
November 10	4.4	0.6	0.08	0.0
November 11	2.2	-1.7	0.79	8.9
November 12	-1.1	-6.1	0.00	0.0
November 13	-3.9	-8.3	0.00	0.0
November 14	-2.8	-13.3	0.00	0.0
November 15	0.6	-13.3	0.00	0.0
November 16	2.8	-2.2	0.00	0.0
November 17	2.2	-2.2	0.61	1.3
November 18	4.4	0.6	0.64	0.0
November 19	4.4	0.0	0.23	2.5
November 20	2.2	-2.2	0.48	6.4
November 21	-1.7	-7.8	0.00	0.0
November 22	-5.0	-12.2	0.64	10.2
November 23	-8.9	-12.8	0.00	0.0
November 24	-3.3	-17.2	0.84	8.6
November 25	0.0	-5.0	0.41	4.8
November 26	-2.2	-17.2	0.00	0.0
November 27	-6.1	-21.7	0.00	0.0
November 28	1.1	-15.0	0.10	1.3
November 29	3.3	-8.9	0.10	1.0
November 30	2.8	-17.2	0.15	0.8

December 1970 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)	Snow (cm)
December 1	4.4	-2.2	0.89	0.0
December 2	-1.7	-13.9	0.00	0.0
December 3	-7.8	-15.6	0.00	0.0
December 4	-1.7	-13.9	0.08	4.8
December 5	-2.2	-12.2	0.03	0.8
December 6	-9.4	-18.3	0.00	0.0
December 7	-2.2	-18.3	0.41	9.4
December 8	-1.1	-15.6	0.74	7.4
December 9	-1.1	-18.9	0.08	1.5
December 10	-10.6	-21.7	0.00	0.0
December 11	-7.2	-22.2	0.03	0.3
December 12	-0.6	-7.2	0.00	0.0
December 13	-0.6	-5.0	0.43	7.1
December 14	-5.0	-12.2	0.36	3.6
December 15	0.0	-9.4	0.10	1.5
December 16	-1.1	-6.7	0.00	0.0
December 17	-2.2	-7.2	0.03	0.0
December 18	0.6	-10.6	0.13	0.3
December 19	-10.6	-18.3	0.03	0.3
December 20	-16.7	-29.4	0.05	0.5
December 21	-10.0	-31.1	0.03	0.3
December 22	-2.2	-10.6	1.12	14.0
December 23	-0.6	-7.8	0.76	10.2
December 24	-7.8	-17.8	0.00	0.0
December 25	-17.2	-28.9	0.00	0.0
December 26	-5.6	-26.1	0.74	12.7
December 27	-10.6	-20.0	0.00	0.0
December 28	-11.7	-23.3	0.00	0.0
December 29	-6.7	-21.7	0.15	4.1
December 30	-0.6	-7.8	0.00	0.0
December 31	-1.1	-2.8	0.03	0.3

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Weather Station Details

Years	Station	Coordinates
2004–2024	Thunder Bay CS	location
1941–2003	Thunder Bay A	location