Thunder Bay Weather in 1999

Historical record of Thunder Bay, Ontario weather for the year 1999 based on NOAA data.

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1999 Thunder Bay Weather Extremes
Highest temperature	34.0 °C	July 30
Lowest temperature	-36.5 °C	January 12
Highest daily low	16.7 °C	July 16
Lowest daily high	-23.2 °C	January 12
Most daily precipitation	2.9 cm	July 5
Total annual precipitation	67.4 cm	-

What was the hottest temperature in Thunder Bay in 1999?

The highest temperature recorded in Thunder Bay, Ontario in 1999 was 34.0 °C which happened on July 30.

Highest Temperatures: All-Time By Year

Highest Temperatures in Thunder Bay in 1999

Rank	Temperature	Date
1	34.0 °C	Jul 30
2	32.6 °C	May 29
3	32.0 °C	Jul 22
4	31.9 °C	Jun 26
5	31.3 °C	Jul 29
6	30.9 °C	Jul 21
7	30.8 °C	Aug 27
8	30.3 °C	Jul 24
9	28.8 °C	Jul 4
10	28.5 °C	Jun 24

What was the coldest temperature in Thunder Bay in 1999?

The lowest temperature recorded in Thunder Bay, Ontario in 1999 was -36.5 °C which happened on Jan 12.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Thunder Bay in 1999

Rank	Temperature	Date
1	-36.5 °C	January 12
2	-32.0 °C	January 11
2	-32.0 °C	January 1
4	-27.9 °C	January 9
5	-27.8 °C	January 2
6	-27.4 °C	January 5
7	-27.0 °C	March 7
8	-26.8 °C	March 6
8	-26.8 °C	March 5
10	-26.6 °C	December 23

January 1999 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
January 1	-19.7	-32.0	0.00
January 2	-14.7	-27.8	0.05
January 3	-15.4	-18.2	0.10
January 4	-15.8	-23.6	0.00
January 5	-12.1	-27.4	0.00
January 6	-15.4	-24.8	0.00
January 7	-15.5	-26.0	0.00
January 8	-14.9	-24.6	0.00
January 9	-19.0	-27.9	0.00
January 10	n/a	n/a	n/a
January 11	-22.5	-32.0	n/a
January 12	-23.2	-36.5	0.00
January 13	n/a	n/a	n/a
January 14	-9.4	-23.3	0.05
January 15	-3.7	-23.8	0.20
January 16	1.8	-4.4	0.30
January 17	1.4	-16.0	0.05
January 18	1.4	-6.7	0.25
January 19	-6.6	-20.2	0.00
January 20	-8.1	-25.7	0.05
January 21	-8.0	-26.2	0.00
January 22	-5.4	-8.7	0.00
January 23	-4.3	-8.8	n/a
January 24	-6.8	-15.0	0.00
January 25	-3.0	-22.8	0.00
January 26	-4.1	-19.8	0.00
January 27	-7.2	-14.3	0.05
January 28	-8.5	-20.4	0.05
January 29	2.2	-15.5	0.05
January 30	0.3	-18.8	0.00
January 31	-0.8	-14.5	0.05

February 1999 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
February 1	1.1	-8.0	0.10
February 2	3.4	n/a	n/a
February 3	1.0	-8.3	0.00
February 4	-7.5	-21.0	0.00
February 5	-0.3	-18.0	0.05
February 6	-3.0	n/a	0.00
February 7	-1.2	-18.4	0.05
February 8	5.3	-1.4	0.10
February 9	3.0	-12.8	0.00
February 10	1.5	-14.5	0.10
February 11	2.7	-12.0	0.15
February 12	-8.7	-14.2	0.10
February 13	-3.0	-16.2	0.00
February 14	n/a	n/a	0.05
February 15	-3.0	-11.4	0.05
February 16	-9.9	-15.4	0.25
February 17	-10.5	-22.8	0.05
February 18	-7.7	-25.6	0.00
February 19	-6.1	-25.7	0.00
February 20	-1.8	-24.9	0.00
February 21	-3.1	-26.5	0.00
February 22	-2.0	-26.2	0.00
February 23	-2.7	-19.5	0.05
February 24	-1.2	-5.1	0.05
February 25	0.9	-3.3	n/a
February 26	1.5	-7.0	0.00
February 27	2.3	0.2	1.40
February 28	1.9	-4.9	0.20

March 1999 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
March 1	-1.4	-12.6	0.05
March 2	-1.0	-13.4	0.25
March 3	-6.2	-20.6	0.05
March 4	-9.3	-25.4	0.00
March 5	-10.1	-26.8	0.00
March 6	-6.6	-26.8	0.00
March 7	-2.4	-27.0	0.00
March 8	-1.6	-20.4	0.05
March 9	-0.4	-11.3	0.20
March 10	-1.3	-18.6	0.00
March 11	1.5	-20.3	0.00
March 12	1.5	-21.7	0.00
March 13	3.3	-13.5	0.00
March 14	4.2	-14.7	0.00
March 15	4.8	-7.7	0.00
March 16	9.3	-2.6	0.05
March 17	2.6	-3.4	1.45
March 18	1.8	-3.9	0.05
March 19	5.6	-8.3	0.00
March 20	3.7	-2.4	0.10
March 21	0.9	-7.4	0.15
March 22	5.1	-12.3	0.00
March 23	1.8	-4.8	0.05
March 24	2.5	-8.0	0.00
March 25	6.4	-10.9	0.05
March 26	9.9	-9.6	0.00
March 27	10.0	-5.1	0.00
March 28	6.7	-0.4	0.85
March 29	9.4	-2.9	0.05
March 30	8.9	-4.6	0.00
March 31	4.1	-0.1	1.65

April 1999 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
April 1	1.4	-2.3	0.05
April 2	2.0	-3.0	0.60
April 3	1.7	-4.1	0.05
April 4	0.8	-0.8	1.40
April 5	2.3	-0.4	0.10
April 6	4.1	-1.5	0.70
April 7	7.2	-3.2	0.00
April 8	12.9	-2.2	0.05
April 9	10.9	-3.2	0.05
April 10	7.8	-5.3	0.00
April 11	9.2	-2.6	0.00
April 12	13.1	-4.9	0.05
April 13	16.2	-4.9	0.00
April 14	19.0	-3.4	0.00
April 15	15.7	3.8	0.00
April 16	12.3	2.2	0.25
April 17	6.5	0.7	0.10
April 18	8.9	-1.4	0.00
April 19	7.8	-0.3	0.10
April 20	11.0	-1.1	0.00
April 21	13.4	-3.6	0.05
April 22	10.5	-4.2	0.00
April 23	11.3	-5.4	0.05
April 24	16.4	-6.7	0.05
April 25	24.2	-3.0	0.05
April 26	16.2	-0.4	0.00
April 27	10.8	-2.6	0.05
April 28	14.9	-4.1	0.00
April 29	21.3	-2.7	0.00
April 30	25.2	-1.0	0.05

May 1999 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
May 1	21.7	-0.4	0.00
May 2	25.3	-0.6	0.05
May 3	18.9	-0.4	0.00
May 4	19.7	8.0	0.00
May 5	16.8	9.4	0.15
May 6	13.4	6.8	2.55
May 7	9.8	5.8	1.45
May 8	10.5	4.5	0.20
May 9	16.8	0.9	0.05
May 10	6.9	1.0	0.35
May 11	11.9	6.0	0.00
May 12	14.5	4.5	0.05
May 13	n/a	n/a	n/a
May 14	16.8	-3.3	0.10
May 15	17.7	-0.8	0.00
May 16	13.1	6.6	0.00
May 17	14.5	8.5	0.60
May 18	15.1	6.5	0.15
May 19	12.8	0.9	0.15
May 20	9.4	4.8	1.80
May 21	19.9	8.1	0.10
May 22	11.1	2.7	0.55
May 23	7.8	5.4	0.65
May 24	11.3	4.0	0.10
May 25	19.8	4.4	0.05
May 26	25.1	0.3	0.05
May 27	26.7	3.6	0.05
May 28	28.1	5.4	0.05
May 29	32.6	5.2	0.05
May 30	28.0	11.4	0.00
May 31	13.4	5.8	0.25

June 1999 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
June 1	7.8	4.7	0.30
June 2	20.3	6.2	0.15
June 3	22.2	4.5	0.05
June 4	16.4	9.8	0.00
June 5	18.4	8.9	0.15
June 6	23.2	7.3	0.00
June 7	26.2	10.3	0.05
June 8	23.2	11.2	0.00
June 9	20.0	10.8	0.00
June 10	26.0	13.4	0.10
June 11	18.8	13.1	0.65
June 12	27.2	11.6	0.10
June 13	23.9	9.0	0.05
June 14	14.2	4.5	0.05
June 15	15.7	2.7	0.05
June 16	18.2	1.1	0.05
June 17	23.4	4.2	0.05
June 18	24.6	6.5	0.20
June 19	23.8	5.7	0.05
June 20	23.2	6.0	0.05
June 21	24.8	9.3	0.00
June 22	21.5	12.1	0.40
June 23	21.9	12.9	0.65
June 24	28.5	11.9	0.20
June 25	27.5	9.9	0.05
June 26	31.9	13.3	0.65
June 27	23.9	13.1	n/a
June 28	18.4	8.4	0.20
June 29	23.2	6.8	0.20
June 30	17.8	12.3	0.00

July 1999 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
July 1	18.0	12.4	0.00
July 2	22.1	11.0	0.40
July 3	18.3	10.8	0.05
July 4	28.8	15.9	2.00
July 5	19.8	13.9	2.90
July 6	25.2	12.1	0.15
July 7	22.6	8.5	0.10
July 8	19.1	6.8	0.00
July 9	17.6	11.0	1.45
July 10	26.2	7.8	0.05
July 11	27.8	13.5	n/a
July 12	28.1	11.3	0.00
July 13	23.5	14.2	0.35
July 14	28.2	13.2	0.85
July 15	21.7	12.8	0.00
July 16	27.3	16.7	0.30
July 17	24.4	13.1	0.00
July 18	22.0	9.3	0.00
July 19	26.1	9.5	0.00
July 20	27.3	11.2	0.00
July 21	30.9	14.3	0.00
July 22	32.0	16.5	0.00
July 23	28.2	14.5	1.20
July 24	30.3	15.1	0.05
July 25	27.3	14.4	0.00
July 26	27.2	12.7	0.00
July 27	27.1	8.5	1.70
July 28	28.4	13.8	0.10
July 29	31.3	13.4	0.00
July 30	34.0	15.0	0.00
July 31	26.7	13.7	0.00

August 1999 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
August 1	21.7	11.1	0.00
August 2	25.0	5.9	0.05
August 3	25.7	8.8	0.00
August 4	22.1	9.2	0.10
August 5	24.6	7.1	0.15
August 6	22.4	6.7	0.00
August 7	20.6	9.6	2.75
August 8	21.5	7.5	0.05
August 9	16.5	8.4	0.15
August 10	24.3	9.3	0.10
August 11	24.4	6.8	0.00
August 12	14.5	7.1	1.70
August 13	23.3	9.2	0.30
August 14	22.9	6.3	0.05
August 15	20.8	7.5	2.60
August 16	26.7	13.4	0.25
August 17	21.8	10.3	0.00
August 18	19.5	7.8	0.00
August 19	22.7	6.0	0.00
August 20	26.7	6.6	0.00
August 21	27.1	9.4	0.00
August 22	26.0	9.4	0.00
August 23	19.0	15.5	0.00
August 24	25.6	13.8	0.00
August 25	27.4	12.5	0.00
August 26	27.5	10.3	0.00
August 27	30.8	15.5	0.00
August 28	23.5	4.7	0.00
August 29	20.8	4.1	0.00
August 30	19.3	1.2	0.00
August 31	20.7	14.1	1.60

September 1999 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
September 1	27.4	14.1	0.05
September 2	20.4	16.5	0.85
September 3	22.9	15.6	0.05
September 4	22.9	15.2	0.05
September 5	22.4	10.1	0.40
September 6	22.1	6.0	0.00
September 7	23.0	5.6	2.40
September 8	22.2	11.6	1.65
September 9	15.2	8.1	0.00
September 10	14.9	8.7	0.20
September 11	16.6	5.8	0.05
September 12	14.4	6.1	0.25
September 13	15.3	3.5	0.30
September 14	14.9	8.5	0.25
September 15	17.9	3.4	0.05
September 16	19.9	1.9	0.05
September 17	20.6	1.0	0.05
September 18	21.3	3.6	0.05
September 19	14.6	5.3	0.60
September 20	9.9	-2.4	0.05
September 21	17.9	-3.4	0.05
September 22	20.4	3.3	0.00
September 23	14.3	1.2	0.00
September 24	13.9	-1.5	0.00
September 25	17.4	-1.0	0.35
September 26	19.4	10.3	0.70
September 27	16.1	1.9	n/a
September 28	18.3	0.8	0.05
September 29	14.6	-1.2	0.00
September 30	13.4	-1.4	0.25

October 1999 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
October 1	8.9	1.3	0.05
October 2	6.7	-3.3	0.25
October 3	8.1	-6.8	0.00
October 4	11.9	-6.4	0.05
October 5	9.5	-5.3	0.00
October 6	6.7	-8.5	0.00
October 7	8.8	2.4	1.80
October 8	10.7	3.5	0.60
October 9	14.4	-0.7	0.15
October 10	16.9	2.4	0.05
October 11	16.0	0.9	0.00
October 12	18.0	3.4	0.15
October 13	10.9	-0.6	0.00
October 14	7.4	-1.4	0.00
October 15	8.9	-2.3	0.05
October 16	9.3	3.4	0.50
October 17	6.6	-0.2	0.00
October 18	5.4	-0.1	0.00
October 19	7.6	-0.1	1.15
October 20	7.5	-0.8	0.00
October 21	13.8	-0.4	0.05
October 22	3.4	2.0	0.00
October 23	2.8	-5.5	0.00
October 24	12.4	-5.0	0.05
October 25	15.1	-5.6	0.05
October 26	4.0	0.7	0.00
October 27	8.4	1.1	0.00
October 28	11.4	-2.0	0.00
October 29	8.5	-4.3	0.00
October 30	13.6	3.0	1.15
October 31	14.0	-3.9	0.05

November 1999 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
November 1	15.6	0.3	0.00
November 2	3.2	-5.9	0.00
November 3	4.5	-8.5	0.00
November 4	10.4	-8.8	0.05
November 5	9.9	0.2	0.00
November 6	7.2	-8.3	0.00
November 7	5.5	-7.3	0.00
November 8	11.3	-3.9	0.00
November 9	18.2	-2.5	0.00
November 10	4.6	-5.1	0.15
November 11	3.5	-0.8	n/a
November 12	n/a	n/a	0.00
November 13	18.0	1.0	0.10
November 14	6.6	-3.6	0.00
November 15	4.9	-4.6	0.00
November 16	2.3	-6.7	0.00
November 17	5.1	-1.5	0.00
November 18	2.3	-2.1	0.05
November 19	1.1	-5.5	0.05
November 20	2.3	-8.4	0.05
November 21	7.5	-0.5	0.00
November 22	7.4	1.2	0.45
November 23	1.2	-0.4	1.10
November 24	3.8	-8.9	0.00
November 25	4.9	-8.4	0.00
November 26	n/a	n/a	0.10
November 27	1.5	-1.7	0.00
November 28	0.8	-3.0	0.00
November 29	-1.9	-11.6	0.00
November 30	1.9	-14.0	0.00

December 1999 Thunder Bay Weather

Day	High (°C)	Low (°C)	Precip. (cm)
December 1	4.6	-7.4	0.00
December 2	3.5	-8.8	0.05
December 3	3.8	0.9	0.40
December 4	3.4	-4.0	n/a
December 5	-3.6	-8.0	0.00
December 6	0.3	n/a	0.00
December 7	2.8	-7.6	0.00
December 8	4.2	-3.0	0.00
December 9	n/a	n/a	n/a
December 10	-2.3	-11.1	0.00
December 11	1.8	-10.7	0.00
December 12	3.4	-7.8	0.05
December 13	2.4	-11.6	0.05
December 14	2.7	-4.3	0.00
December 15	0.9	-12.3	0.10
December 16	-12.2	-19.4	0.00
December 17	-14.4	-22.6	0.00
December 18	-2.4	-19.1	0.00
December 19	-0.3	-8.3	0.10
December 20	-0.8	-22.1	0.10
December 21	-17.2	-25.6	0.00
December 22	-15.7	-24.3	0.00
December 23	-13.9	-26.6	0.05
December 24	-6.7	-20.5	0.00
December 25	5.6	-12.4	0.15
December 26	-6.9	-16.6	0.00
December 27	-10.4	-21.2	0.20
December 28	-8.2	-16.8	0.10
December 29	-1.4	-18.0	0.50
December 30	-12.6	-23.8	0.10
December 31	-9.4	-14.8	0.10

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Weather Station Details

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