Seattle Weather in 2021

Historical record of Seattle, Washington weather for the year 2021 based on NOAA data.

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2021 Seattle Weather Extremes
Highest temperature	108 °F	June 28
Lowest temperature	17 °F	December 27
Highest daily low	73 °F	June 27
Lowest daily high	27 °F	December 27
Most daily precipitation	2.3 inches	January 12
Most daily snow	8.9 inches	February 13
Total annual precipitation	43.3 inches	-
Total annual snow	21.6 inches	-

What was the hottest temperature in Seattle in 2021?

The highest temperature recorded in Seattle, Washington in 2021 was 108 °F which happened on June 28.

Highest Temperatures: All-Time By Year

Highest Temperatures in Seattle in 2021

Rank	Temperature	Date
1	108 °F	Jun 28
2	104 °F	Jun 27
3	102 °F	Jun 26
4	95 °F	Aug 12
5	92 °F	Jul 30
6	91 °F	Aug 13
6	91 °F	Aug 11
6	91 °F	Jul 29
9	89 °F	Jun 21
10	88 °F	Aug 4
10	88 °F	Jul 28

What was the coldest temperature in Seattle in 2021?

The lowest temperature recorded in Seattle, Washington in 2021 was 17 °F which happened on Dec 27.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Seattle in 2021

Rank	Temperature	Date
1	17 °F	December 27
2	20 °F	December 26
3	22 °F	December 31
3	22 °F	December 29
5	24 °F	December 28
6	25 °F	February 13
6	25 °F	February 12
8	28 °F	December 30
9	29 °F	February 10
9	29 °F	January 23

January 2021 Seattle Weather

Day	High (°F)	Low (°F)	Precip. (inches)
January 1	52	45	0.42
January 2	49	41	1.71
January 3	48	38	0.44
January 4	51	43	0.39
January 5	47	42	0.66
January 6	52	39	0.19
January 7	52	40	0.00
January 8	51	37	0.22
January 9	48	31	0.00
January 10	49	41	0.12
January 11	47	43	0.97
January 12	57	47	2.33
January 13	56	40	0.08
January 14	58	38	0.05
January 15	54	42	0.11
January 16	47	38	0.00
January 17	51	43	0.04
January 18	49	36	0.00
January 19	45	34	0.00
January 20	47	34	0.00
January 21	46	41	0.04
January 22	46	34	0.00
January 23	43	29	0.00
January 24	41	38	0.18
January 25	44	35	0.00
January 26	43	34	0.00
January 27	46	37	0.12
January 28	47	40	0.27
January 29	47	40	0.07
January 30	50	41	0.16
January 31	50	43	0.18

February 2021 Seattle Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
February 1	50	44	0.88	0.0
February 2	46	39	0.61	0.0
February 3	50	40	0.07	0.0
February 4	48	42	0.01	0.0
February 5	52	44	0.00	0.0
February 6	50	43	0.00	0.0
February 7	48	38	0.04	0.0
February 8	45	35	0.00	0.0
February 9	45	31	0.00	0.0
February 10	43	29	0.00	0.0
February 11	38	30	0.00	0.0
February 12	34	25	0.14	2.2
February 13	31	25	0.57	8.9
February 14	38	30	0.31	1.3
February 15	44	33	0.41	0.0
February 16	51	38	0.00	0.0
February 17	48	36	0.00	0.0
February 18	45	37	0.08	0.0
February 19	50	40	0.14	0.0
February 20	49	38	0.00	0.0
February 21	51	43	0.32	0.0
February 22	52	41	0.35	0.0
February 23	49	36	0.36	0.0
February 24	46	32	0.01	0.0
February 25	48	38	0.24	0.0
February 26	51	36	0.13	0.0
February 27	49	32	0.00	0.0
February 28	53	41	0.01	0.0

March 2021 Seattle Weather

Day	High (°F)	Low (°F)	Precip. (inches)
March 1	57	38	0.00
March 2	50	40	0.00
March 3	56	35	0.00
March 4	53	37	0.30
March 5	53	44	0.04
March 6	51	41	0.01
March 7	49	38	0.14
March 8	51	31	0.00
March 9	55	36	0.00
March 10	54	36	0.00
March 11	55	36	0.00
March 12	57	35	0.00
March 13	60	36	0.00
March 14	47	39	0.29
March 15	48	35	0.00
March 16	52	33	0.00
March 17	59	35	0.00
March 18	55	39	0.14
March 19	56	42	0.05
March 20	52	42	0.25
March 21	45	41	0.08
March 22	53	40	0.08
March 23	54	38	0.00
March 24	52	42	0.35
March 25	54	42	0.55
March 26	53	41	0.00
March 27	54	41	0.00
March 28	47	39	0.33
March 29	51	35	0.00
March 30	54	34	0.00
March 31	62	35	0.00

April 2021 Seattle Weather

Day	High (°F)	Low (°F)	Precip. (inches)
April 1	58	42	0.00
April 2	57	42	0.00
April 3	63	41	0.00
April 4	52	39	0.00
April 5	56	35	0.00
April 6	60	37	0.00
April 7	48	42	0.23
April 8	54	40	0.02
April 9	50	36	0.01
April 10	53	40	0.01
April 11	54	34	0.00
April 12	59	36	0.00
April 13	64	40	0.00
April 14	67	39	0.00
April 15	75	43	0.00
April 16	79	47	0.00
April 17	80	48	0.00
April 18	79	50	0.00
April 19	72	48	0.00
April 20	72	48	0.00
April 21	73	48	0.00
April 22	62	47	0.00
April 23	61	45	0.04
April 24	50	47	0.51
April 25	60	47	0.10
April 26	61	45	0.00
April 27	61	45	0.00
April 28	64	47	0.00
April 29	74	49	0.00
April 30	65	50	0.11

May 2021 Seattle Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	61	47	0.03
May 2	62	48	0.00
May 3	57	46	0.25
May 4	63	50	0.03
May 5	71	45	0.00
May 6	68	48	0.00
May 7	59	46	0.00
May 8	59	44	0.00
May 9	64	48	0.10
May 10	67	44	0.00
May 11	70	46	0.00
May 12	71	55	0.00
May 13	73	48	0.00
May 14	75	50	0.00
May 15	75	49	0.00
May 16	77	50	0.00
May 17	62	49	0.07
May 18	61	45	0.07
May 19	58	45	0.00
May 20	61	44	0.01
May 21	62	45	0.00
May 22	62	47	0.00
May 23	64	51	0.00
May 24	60	49	0.13
May 25	63	51	0.00
May 26	63	50	0.00
May 27	60	49	0.43
May 28	64	49	0.00
May 29	72	47	0.00
May 30	73	52	0.00
May 31	80	54	0.00

June 2021 Seattle Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	86	58	0.00
June 2	85	58	0.00
June 3	75	56	0.00
June 4	68	51	0.00
June 5	66	50	0.00
June 6	55	44	0.35
June 7	63	44	0.11
June 8	69	49	0.01
June 9	68	46	0.00
June 10	65	48	0.00
June 11	59	52	0.46
June 12	73	50	0.13
June 13	64	57	0.81
June 14	65	55	0.04
June 15	69	53	0.00
June 16	72	52	0.00
June 17	79	53	0.00
June 18	74	56	0.00
June 19	76	54	0.00
June 20	81	58	0.00
June 21	89	61	0.00
June 22	76	57	0.00
June 23	77	55	0.00
June 24	83	55	0.00
June 25	87	64	0.00
June 26	102	69	0.00
June 27	104	73	0.00
June 28	108	66	0.00
June 29	85	62	0.00
June 30	74	60	0.00

July 2021 Seattle Weather

Day	High (°F)	Low (°F)
July 1	74	62
July 2	79	58
July 3	82	57
July 4	77	57
July 5	74	56
July 6	82	54
July 7	71	56
July 8	73	53
July 9	82	54
July 10	79	57
July 11	81	55
July 12	81	55
July 13	81	54
July 14	74	54
July 15	69	54
July 16	71	56
July 17	77	55
July 18	80	57
July 19	82	55
July 20	72	57
July 21	72	56
July 22	77	53
July 23	80	53
July 24	84	60
July 25	85	60
July 26	83	60
July 27	83	63
July 28	88	58
July 29	91	59
July 30	92	61
July 31	77	64

August 2021 Seattle Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	81	62	0.00
August 2	87	57	0.00
August 3	82	54	0.00
August 4	88	58	0.00
August 5	83	60	0.05
August 6	77	62	0.03
August 7	75	58	0.00
August 8	74	55	0.00
August 9	79	55	0.00
August 10	85	62	0.00
August 11	91	63	0.00
August 12	95	69	0.00
August 13	91	68	0.00
August 14	84	61	0.00
August 15	82	60	0.00
August 16	76	57	0.00
August 17	68	53	0.00
August 18	77	53	0.00
August 19	79	56	0.00
August 20	66	57	0.00
August 21	70	55	0.00
August 22	69	55	0.00
August 23	71	52	0.00
August 24	79	52	0.00
August 25	75	54	0.00
August 26	71	58	0.01
August 27	69	57	0.02
August 28	78	51	0.00
August 29	79	55	0.00
August 30	64	50	0.00
August 31	67	52	0.00

September 2021 Seattle Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	72	48	0.00
September 2	78	50	0.00
September 3	79	53	0.00
September 4	79	52	0.00
September 5	79	62	0.00
September 6	75	60	0.00
September 7	81	55	0.00
September 8	80	60	0.00
September 9	80	58	0.00
September 10	66	58	0.00
September 11	72	56	0.00
September 12	67	56	0.02
September 13	69	53	0.00
September 14	69	50	0.00
September 15	65	53	0.13
September 16	66	47	0.00
September 17	69	53	0.58
September 18	64	52	0.81
September 19	64	51	0.00
September 20	68	54	0.00
September 21	75	49	0.00
September 22	66	54	0.01
September 23	69	54	0.00
September 24	76	52	0.00
September 25	77	53	0.00
September 26	62	53	0.48
September 27	60	51	0.34
September 28	62	51	0.05
September 29	59	51	0.08
September 30	62	54	0.52

October 2021 Seattle Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	64	49	0.00
October 2	66	46	0.00
October 3	57	50	0.02
October 4	62	50	0.00
October 5	55	48	0.33
October 6	58	47	0.03
October 7	58	42	0.00
October 8	58	41	0.00
October 9	56	43	0.05
October 10	56	41	0.46
October 11	54	40	0.06
October 12	50	36	0.09
October 13	52	43	0.02
October 14	60	46	0.09
October 15	61	51	0.02
October 16	67	53	0.00
October 17	56	49	0.01
October 18	54	48	0.00
October 19	61	45	0.00
October 20	61	51	0.29
October 21	69	51	0.54
October 22	56	47	0.06
October 23	54	48	0.15
October 24	59	49	0.32
October 25	57	49	0.16
October 26	56	48	0.38
October 27	54	46	0.12
October 28	60	47	1.99
October 29	51	40	0.57
October 30	53	38	0.00
October 31	59	37	0.00

November 2021 Seattle Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	57	42	0.14
November 2	52	44	0.22
November 3	61	48	0.52
November 4	57	47	0.53
November 5	52	44	0.10
November 6	48	41	0.41
November 7	47	40	0.50
November 8	58	38	0.00
November 9	53	43	0.63
November 10	53	40	0.06
November 11	56	45	1.26
November 12	58	48	0.68
November 13	54	43	0.94
November 14	63	54	0.90
November 15	62	41	0.20
November 16	49	37	0.00
November 17	51	31	0.00
November 18	49	41	0.41
November 19	47	41	0.28
November 20	48	39	0.02
November 21	46	34	0.00
November 22	45	34	0.10
November 23	50	40	0.50
November 24	47	35	0.02
November 25	47	42	0.69
November 26	53	45	0.03
November 27	58	48	0.91
November 28	59	53	0.09
November 29	58	52	0.00
November 30	54	51	0.12

December 2021 Seattle Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
December 1	56	53	0.00	0.0
December 2	53	40	0.11	0.0
December 3	43	35	0.00	0.0
December 4	42	37	0.47	0.0
December 5	42	33	0.00	0.0
December 6	45	37	0.10	0.0
December 7	49	43	0.07	0.0
December 8	49	38	0.03	0.0
December 9	43	36	0.00	0.0
December 10	46	39	0.15	0.0
December 11	48	38	0.48	0.0
December 12	41	36	0.17	0.0
December 13	42	36	0.13	0.0
December 14	40	33	0.14	0.0
December 15	42	36	0.08	0.0
December 16	44	36	0.05	0.0
December 17	44	35	0.18	0.0
December 18	50	36	n/a	0.0
December 19	45	36	0.00	0.0
December 20	37	33	0.26	0.0
December 21	41	34	0.19	0.0
December 22	50	41	0.43	0.0
December 23	46	38	0.16	0.0
December 24	43	36	0.33	0.0
December 25	37	31	0.13	0.0
December 26	31	20	0.26	3.4
December 27	27	17	0.03	0.5
December 28	28	24	n/a	1.0
December 29	29	22	0.13	0.9
December 30	34	28	n/a	3.4
December 31	31	22	0.00	0.0

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Weather Station Details

Years	Station	Coordinates
1948–2024	Seattle Tacoma International Airport	location
1894–1947	University of Washington	location