Boston Weather in 2021

Historical record of Boston, Massachusetts weather for the year 2021 based on NOAA data.

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2021 Boston Weather Extremes
Highest temperature	100 °F	June 30
Lowest temperature	7 °F	January 31
Highest daily low	79 °F	June 29
Lowest daily high	18 °F	January 29
Most daily precipitation	2.5 inches	September 2
Most daily snow	5.3 inches	February 7
Total annual precipitation	52.3 inches	-
Total annual snow	21.7 inches	-

What was the hottest temperature in Boston in 2021?

The highest temperature recorded in Boston, Massachusetts in 2021 was 100 °F which happened on June 30.

Highest Temperatures: All-Time By Year

Highest Temperatures in Boston in 2021

Rank	Temperature	Date
1	100 °F	Jun 30
2	99 °F	Jun 29
3	97 °F	Jun 28
4	96 °F	Aug 26
4	96 °F	Aug 12
4	96 °F	Jun 7
7	95 °F	Jul 16
7	95 °F	Jun 8
9	94 °F	Aug 25
9	94 °F	Jun 6

What was the coldest temperature in Boston in 2021?

The lowest temperature recorded in Boston, Massachusetts in 2021 was 7 °F which happened 2 different times.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Boston in 2021

Rank	Temperature	Date
1	7 °F	January 31
1	7 °F	January 29
3	8 °F	January 30
4	11 °F	February 12
5	13 °F	March 2
6	16 °F	January 28
6	16 °F	January 24
8	17 °F	March 15
8	17 °F	February 13
8	17 °F	January 23

January 2021 Boston Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
January 1	36	29	0.10	0.0
January 2	42	32	0.41	0.0
January 3	36	29	0.03	0.2
January 4	39	31	0.00	0.0
January 5	33	30	0.01	0.0
January 6	40	30	0.00	0.0
January 7	42	29	0.00	0.0
January 8	41	26	0.00	0.0
January 9	36	24	0.00	0.0
January 10	41	27	0.00	0.0
January 11	36	24	0.00	0.0
January 12	42	27	0.00	0.0
January 13	40	31	0.00	0.0
January 14	39	31	0.10	0.0
January 15	41	33	0.00	0.0
January 16	52	37	1.03	0.0
January 17	43	34	0.00	0.0
January 18	45	31	0.00	0.0
January 19	41	27	0.00	0.0
January 20	38	25	0.00	0.0
January 21	32	21	0.00	0.1
January 22	43	30	0.00	0.0
January 23	34	17	0.00	0.0
January 24	31	16	0.00	0.0
January 25	36	19	0.00	0.0
January 26	35	22	0.22	3.6
January 27	36	28	0.07	1.0
January 28	33	16	0.05	0.9
January 29	18	7	0.00	0.0
January 30	20	8	0.00	0.0
January 31	23	7	0.00	0.0

February 2021 Boston Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
February 1	35	22	0.69	1.2
February 2	40	30	0.20	0.0
February 3	34	28	0.00	0.0
February 4	37	29	0.01	0.1
February 5	41	26	0.01	0.0
February 6	42	30	0.00	0.0
February 7	37	26	0.44	5.3
February 8	29	19	0.00	0.0
February 9	27	21	0.17	3.0
February 10	31	20	0.00	0.0
February 11	30	19	0.00	0.0
February 12	27	11	0.00	0.0
February 13	29	17	0.00	0.0
February 14	33	26	0.00	0.0
February 15	32	27	0.03	0.0
February 16	40	30	0.63	0.0
February 17	32	23	0.00	0.0
February 18	31	24	0.09	0.9
February 19	30	25	0.43	4.8
February 20	31	23	0.00	0.0
February 21	33	19	0.00	0.0
February 22	40	19	0.16	0.0
February 23	43	34	0.00	0.0
February 24	50	37	0.00	0.0
February 25	47	33	0.00	0.0
February 26	40	28	0.00	0.0
February 27	47	30	0.17	0.0
February 28	44	36	0.02	0.0

March 2021 Boston Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
March 1	44	26	0.18	0.0
March 2	28	13	0.00	0.0
March 3	50	23	0.00	0.0
March 4	43	27	0.00	0.0
March 5	36	24	0.00	0.0
March 6	36	22	0.00	0.0
March 7	38	22	0.00	0.0
March 8	38	25	0.00	0.0
March 9	61	36	0.00	0.0
March 10	48	34	0.00	0.0
March 11	74	36	0.00	0.0
March 12	65	47	0.00	0.0
March 13	49	32	0.00	0.0
March 14	49	24	0.00	0.1
March 15	30	17	0.00	0.0
March 16	36	20	0.00	0.0
March 17	53	31	0.00	0.0
March 18	49	38	0.66	0.0
March 19	44	31	0.00	0.0
March 20	61	32	0.00	0.0
March 21	58	36	0.00	0.0
March 22	58	35	0.00	0.0
March 23	57	38	0.00	0.0
March 24	53	40	0.00	0.0
March 25	62	46	0.15	0.0
March 26	70	53	0.01	0.0
March 27	59	43	0.00	0.0
March 28	59	42	0.69	0.0
March 29	54	42	0.00	0.0
March 30	60	36	0.00	0.0
March 31	70	44	0.20	0.0

April 2021 Boston Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
April 1	58	35	0.92	0.0
April 2	41	29	0.00	0.0
April 3	50	30	0.00	0.0
April 4	62	33	0.00	0.0
April 5	58	47	0.00	0.0
April 6	61	46	0.00	0.0
April 7	58	46	0.00	0.0
April 8	56	45	0.00	0.0
April 9	59	44	0.00	0.0
April 10	78	48	0.00	0.0
April 11	60	45	0.00	0.0
April 12	51	43	0.00	0.0
April 13	58	44	0.00	0.0
April 14	51	46	0.00	0.0
April 15	54	42	0.22	0.0
April 16	45	35	1.60	0.1
April 17	51	39	0.08	0.0
April 18	63	44	0.00	0.0
April 19	63	48	0.01	0.0
April 20	76	51	0.00	0.0
April 21	72	38	0.24	0.0
April 22	47	34	0.00	0.0
April 23	60	38	0.00	0.0
April 24	74	50	0.00	0.0
April 25	57	50	0.11	0.0
April 26	57	47	0.00	0.0
April 27	69	45	0.00	0.0
April 28	60	49	0.22	0.0
April 29	50	48	0.89	0.0
April 30	65	43	0.15	0.0

May 2021 Boston Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	65	44	0.02
May 2	77	50	0.01
May 3	65	50	0.02
May 4	55	48	0.67
May 5	50	48	0.53
May 6	67	50	0.00
May 7	56	48	0.00
May 8	55	46	0.00
May 9	69	49	0.00
May 10	63	49	0.34
May 11	66	51	0.00
May 12	69	48	0.00
May 13	71	51	0.00
May 14	77	56	0.00
May 15	74	61	0.00
May 16	79	58	0.01
May 17	75	54	0.00
May 18	84	59	0.00
May 19	72	58	0.00
May 20	69	55	0.00
May 21	82	56	0.00
May 22	89	62	0.00
May 23	90	62	0.00
May 24	67	55	0.00
May 25	79	53	0.00
May 26	92	63	0.28
May 27	83	62	0.01
May 28	62	45	1.08
May 29	51	47	1.08
May 30	51	50	0.72
May 31	62	51	0.15

June 2021 Boston Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	77	54	0.00
June 2	79	58	0.00
June 3	76	60	0.00
June 4	81	66	0.11
June 5	91	63	0.00
June 6	94	70	0.00
June 7	96	73	0.00
June 8	95	75	0.00
June 9	92	74	0.05
June 10	76	59	0.00
June 11	66	57	0.12
June 12	71	60	0.59
June 13	85	62	0.00
June 14	70	60	0.53
June 15	73	62	0.01
June 16	77	63	0.00
June 17	80	60	0.00
June 18	85	60	0.00
June 19	91	69	0.00
June 20	89	71	0.00
June 21	87	69	0.00
June 22	87	63	0.91
June 23	75	59	0.00
June 24	74	59	0.00
June 25	70	61	0.09
June 26	86	66	0.00
June 27	89	74	0.00
June 28	97	75	0.00
June 29	99	79	0.00
June 30	100	72	0.16

July 2021 Boston Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	85	68	1.28
July 2	69	59	1.67
July 3	60	57	1.68
July 4	68	58	0.31
July 5	78	57	0.00
July 6	92	69	0.29
July 7	92	70	0.03
July 8	71	64	0.30
July 9	78	63	2.04
July 10	74	64	0.05
July 11	82	62	0.03
July 12	71	65	1.21
July 13	70	65	0.01
July 14	78	66	0.00
July 15	79	71	0.00
July 16	95	74	0.02
July 17	79	70	0.17
July 18	74	67	0.30
July 19	73	67	0.00
July 20	88	68	0.00
July 21	84	68	0.00
July 22	78	65	0.00
July 23	80	69	0.00
July 24	77	64	0.00
July 25	76	69	0.15
July 26	93	70	0.00
July 27	87	69	0.38
July 28	75	66	0.00
July 29	81	66	0.01
July 30	84	65	0.14
July 31	79	61	0.00

August 2021 Boston Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	78	62	0.00
August 2	83	66	0.00
August 3	77	65	0.00
August 4	75	65	0.58
August 5	71	65	1.42
August 6	89	67	0.00
August 7	92	71	0.00
August 8	84	71	0.00
August 9	75	68	1.15
August 10	76	67	0.03
August 11	93	73	0.00
August 12	96	76	0.00
August 13	91	76	0.00
August 14	92	78	0.01
August 15	80	70	0.00
August 16	78	65	0.00
August 17	85	67	0.00
August 18	89	72	0.00
August 19	87	73	1.14
August 20	80	73	0.05
August 21	83	72	0.00
August 22	75	70	0.76
August 23	76	69	1.69
August 24	91	71	0.00
August 25	94	76	0.00
August 26	96	75	0.00
August 27	90	74	0.00
August 28	75	64	0.07
August 29	73	64	0.08
August 30	88	71	0.02
August 31	84	73	0.00

September 2021 Boston Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	75	61	1.69
September 2	77	61	2.54
September 3	77	59	0.00
September 4	81	63	0.00
September 5	74	64	0.05
September 6	84	69	0.00
September 7	82	65	0.00
September 8	85	64	0.00
September 9	76	68	0.96
September 10	79	63	0.19
September 11	79	59	0.00
September 12	83	65	0.00
September 13	82	66	0.06
September 14	73	63	0.00
September 15	86	68	0.00
September 16	75	65	0.31
September 17	70	65	0.00
September 18	74	66	0.06
September 19	72	62	0.28
September 20	72	57	0.00
September 21	73	57	0.00
September 22	80	66	0.00
September 23	82	67	0.03
September 24	80	69	0.00
September 25	75	65	0.03
September 26	77	61	0.55
September 27	76	58	0.00
September 28	71	58	0.72
September 29	66	52	0.00
September 30	64	53	0.00

October 2021 Boston Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	69	51	0.00
October 2	76	52	0.00
October 3	68	59	0.13
October 4	63	55	1.08
October 5	63	54	0.30
October 6	68	56	0.00
October 7	74	56	0.00
October 8	71	59	0.00
October 9	66	61	0.00
October 10	66	61	0.00
October 11	69	60	0.00
October 12	75	57	0.00
October 13	78	60	0.00
October 14	75	60	0.00
October 15	69	60	0.00
October 16	76	62	0.02
October 17	65	52	0.31
October 18	62	47	0.00
October 19	63	46	0.00
October 20	72	54	0.00
October 21	75	58	0.00
October 22	72	55	0.00
October 23	60	49	0.00
October 24	58	44	0.00
October 25	56	50	0.81
October 26	60	50	0.92
October 27	52	47	0.10
October 28	50	43	0.00
October 29	52	41	0.00
October 30	59	52	1.02
October 31	67	53	0.42

November 2021 Boston Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	60	47	0.00
November 2	57	45	0.00
November 3	52	40	0.00
November 4	49	36	0.00
November 5	51	37	0.00
November 6	51	36	0.00
November 7	54	34	0.00
November 8	60	40	0.00
November 9	70	42	0.00
November 10	62	48	0.00
November 11	53	41	0.00
November 12	63	49	0.53
November 13	57	41	0.19
November 14	50	37	0.00
November 15	49	40	0.08
November 16	49	37	0.00
November 17	52	34	0.00
November 18	70	52	0.00
November 19	55	37	0.28
November 20	44	33	0.00
November 21	54	39	0.00
November 22	57	37	0.22
November 23	40	28	0.00
November 24	43	27	0.00
November 25	54	35	0.00
November 26	47	35	0.04
November 27	39	30	0.00
November 28	38	29	0.00
November 29	41	29	0.00
November 30	41	26	0.00

December 2021 Boston Weather

Day	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
December 1	46	33	0.00	0.0
December 2	60	36	0.02	0.0
December 3	45	33	0.00	0.0
December 4	42	28	0.00	0.0
December 5	47	38	0.00	0.0
December 6	62	42	0.25	0.0
December 7	45	34	0.00	0.0
December 8	37	28	0.00	0.3
December 9	38	26	0.01	0.0
December 10	44	28	0.00	0.0
December 11	64	35	0.25	0.0
December 12	62	38	0.04	0.0
December 13	52	37	0.00	0.0
December 14	51	35	0.00	0.0
December 15	45	32	0.02	0.0
December 16	60	45	0.17	0.0
December 17	60	42	0.00	0.0
December 18	43	33	0.56	0.1
December 19	44	23	0.38	0.0
December 20	33	20	0.00	0.0
December 21	44	30	0.00	0.0
December 22	43	33	0.09	0.0
December 23	33	24	0.00	0.0
December 24	30	23	0.00	0.0
December 25	36	28	0.32	0.0
December 26	40	33	0.24	0.0
December 27	35	30	0.00	0.0
December 28	46	33	0.04	0.0
December 29	42	36	0.00	0.0
December 30	42	38	0.06	0.0
December 31	46	40	0.00	0.0

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Weather Station Details

Years	Station	Coordinates
1936–2024	Boston Logan International Airport	location
1893–1935	Boston City	location