Boston Historic Weather Records
Analyse hottest, coldest, windiest & wettest days

Boston Weather Trend Graph

Temperature (°C)

Months

Months	Historic Min Temp.	Min Temp.	Forecasted Min Temp.	Historic Max Temp.	Max Temp.	Forecasted Max Temp.
	-2.09375	-7		4.1375	-1
	-3.9437499999999996	-9.4		3.1999999999999997	-2.9
	-5.099999999999999	-7.1		1.2374999999999998	0.5
	-5.04375	-5.6		2.3875	-0.7
	-4.975	-10.9		1.8124999999999998	-5.1
	-4.9375	-4.9		1.08125	-0.2
	-6.5874999999999995	0.4		0.19375000000000003	3
	-6.84375	-1.4		-0.03749999999999995	7.1
	-6.1875	-4		0.4937500000000001	5.8
	-5.156250000000001	2.8		3.19375	8.1
	-3.8	0.3		3.0437499999999997	5.4
	-2.0875	-3.9		5.58125	2.6
	-3.600000000000001	-1.8		5.125	4.2
	-4.6875	3.6		1.44375	8.1
Jan.	-5.1125	-4.3		0.5875000000000001	5.3
	-4.949999999999998	-6.2		2.3249999999999997	0.4
	-4.6187499999999995	-2		1.1875000000000002	2.8
	-5.0375000000000005	-1.2		2.3375	2.7
	-4.275	-4		2.375	0.7
	-5.9624999999999995	-8.5		1.0187499999999998	-2.4
	-7.6	-10.2		-1.7812499999999998	-1.4
	-8.212499999999999	-0.8		-0.8875000000000001	5.4
	-7.1375	-6.1		0.8375000000000001	-0.4
	-6.5375000000000005	-14.7		0.6812499999999999	-9.6
	-5.200000000000001	-13.4		2.275	-4.3
	-4.7	-7.8		2.2375	-1.2
	-3.8812500000000005	-12.2		2.90625	-5.3
	-4.6875	-14.2		1.4625000000000001	-4
	-6.3	-12.6		0.5125000000000001	-3.7
	-7.206250000000002	-16.1		0.40625	-8.1
	-8.0375	-17.9		0.40625	-6.2
	-6.14375	-11.2		2.43125	-4.4
	-4.94375	-12.4		2.3375000000000004	-1.6
	-5.7375	-14.4		1.25625	-0.4
	-5.831250000000001	-7.1		2.7062500000000003	0.3
	-6.20625	-10.3		3.0437499999999997	-3.2
	-6.281249999999998	-12.1		1.3187499999999999	-3.3
	-5.456250000000001	-12		2.3062499999999995	-0.9
	-5.46875	-17.7		2.15625	-8.2
	-6.4625	-15.1		0.5562499999999998	-1.5
	-5.456250000000002	-11.7		2.55625	-1
	-6.10625	-3.3		1.425	1.2
	-6.99375	-5		2.33125	2.2
	-6.4875	-9.1		0.85	1.4
	-6.775000000000002	-5.6		1.4437499999999996	2
Feb.	-7.5625	-4.1		2.5	0.6
	-3.8687500000000004	-3.3		3.75625	2.3
	-4.4624999999999995	-1		3.16875	2.5
	-5.5687500000000005	-1.7		2.8874999999999997	1.5
	-5.46875	-5.4		3.474999999999999	3.7
	-4.3	-1.8		2.80625	1.9
	-3.83125	-2.5		4.28125	0.4
	-3.437500000000001	-4.6		5.74375	1.4
	-2.4312499999999995	-5.3		5.725	0.4
	-2.7062500000000007	-6.6		5.9750000000000005	1
	-1.99375	-10.9		4.8	2.2
	-4.4437500000000005	-4.4		3.1375	3.9
	-4.25625	-6.7		4.4312499999999995	3.3
	-2.8249999999999997	-2.3		4.856249999999999	5.8
	-3.6125000000000003	-3.1		5.5625	0.6
	-3.5437500000000006	-12.1		4.01875	-2
	-5.1499999999999995	-8.4		3.1187499999999995	0.6
	-3.80625	-0.3		3.3125	4.9
	-4.10625	-2.4		3.6125	1.5
	-3.5874999999999995	0.6		4.481249999999999	1.6
	-3.4875	0.8		5.075	5
	-2.61875	5.5		6.3374999999999995	11.6
	-1.94375	1		6.893749999999999	13.4
	-1.4749999999999999	3.2		8.50625	9.6
	0.9750000000000001	3.4		8.94375	8.6
	-0.34375	-0.4		7.3125	11.6
	-1.69375	-2.6		6.668750000000001	4.5
	-0.09374999999999994	0.1		7.56875	6.4
Mar.	-0.06250000000000003	-1.8		7.11875	4.5
	-0.7812500000000002	2		6.55625	14.6
	-1.3375000000000004	-2.2		7.637499999999999	15.3
	-0.26874999999999993	-5.2		8.9375	1
	-0.6874999999999999	-3.5		7.18125	5.2
	-0.5250000000000001	-1.6		9.450000000000001	9.3
	0.2250000000000001	2.9		9.05625	10
	-0.10625000000000007	3.7		8.118749999999999	9
	-1.075	0.7		7.28125	2.8
	0.15625	-1		8.35625	6.6
	0.5375	0.3		8.125	8
	0.8937499999999998	4.4		8.143749999999999	13.7
	-0.6187500000000001	1.4		7.48125	10
	0.3499999999999999	-4.7		8.48125	-0.1
	1.34375	-4.3		8.93125	6.8
	1.5312499999999998	3.4		9.518749999999999	14.9
	1.95625	8.8		10.875	13
	1.9187500000000002	4.2		10.1	22.1
	0.6937499999999999	2.5		9.5625	3.6
	1.7937500000000004	2.9		11.293750000000003	18.9
	2.3000000000000003	3.2		10.499999999999998	13.4
	1.925	3.7		9.38125	14
	1.9749999999999996	1.8		10.487499999999999	10.3
	2.4875000000000003	0.1		11.431249999999999	7.9
	3.15	-0.7		11.131250000000001	7.2
	2.24375	-2		11.6875	17.5
	3.4812499999999997	-0.3		12.943750000000001	24.4
	4.5625	6.5		14.312499999999998	17.8
	5.1	1		13.456249999999999	12.3
	6.0375000000000005	5.3		15.024999999999999	25
	6.318749999999999	12.8		15.95	28.4
Apr.	4.90625	7.5		14.25625	21.8
	4.737500000000001	7.8		13.312500000000002	14.6
	5.53125	8.3		13.6625	18.5
	4.3125	6.3		13.325000000000001	9.4
	5.56875	2.9		13.718750000000002	10.2
	5.5874999999999995	0.3		14.83125	10.3
	5.31875	-0.2		14.831249999999999	10.3
	5.499999999999999	0.7		15.181249999999999	7.9
	5.1875	5.5		13.775	20.6
	5.950000000000001	0.4		15.868749999999999	11.3
	6.45	1.3		13.675	9.4
	5.9312499999999995	4.2		13.931250000000002	16.8
	5.3125	4		14.05625	14.6
	5.7437499999999995	4.1		15.681249999999999	12.4
	6.406249999999999	6.1		15.343750000000002	11.4
	6.525	6.9		14.05	11.9
	6.481250000000001	5.6		15.556250000000002	17.7
	8.000000000000002	6.2		17.4375	16.7
	8.95625	6.1		17.5625	12.4
	8.8	3.9		16.424999999999997	24.6
	8.30625	11.6		15.5625	24.4
	8.20625	14.1		16.86875	26.4
	8.31875	8.9		18.174999999999997	20.6
	8.50625	4.8		16.94375	17.1
	7.731250000000001	4.3		15.3375	14
	8.30625	9.3		17.5375	23.9
	8.66875	9.1		18.212500000000002	20.8
	8.043750000000001	5.4		17.7125	17.4
	8.00625	6.7		17.28125	22.5
	8.325	9.8		18.49375	16.4
May	10.3125	8.6		20.79375	13.3
	12	7.3		20.968749999999996	28.4
	10.875	16.7		19.887500000000006	29.4
	10.412499999999998	13.8		19.89375	22.6
	10.08125	16.6		18.125000000000004	38.4
	10.937499999999998	18.2		20.056250000000002	32.3
	10.54375	10.6		20.474999999999994	20.1
	11.025000000000002	7.8		20.28125	19.1
	11.3375	8.8		20.868750000000002	18.6
	11.087499999999999	9.8		21.349999999999998	11.7
	10.868749999999999	11.5		20.5875	21.8
	11.8875	12.3		24.218750000000004	31.2
	12.968749999999998	16.5		23.98125	33.7
	13.087499999999999	13.3		21.85625	22.9
	13.225	11.3		21.618749999999995	22.2
	13.368749999999997	6.7		23.062500000000004	12.1
	13.212499999999997	4.3		22.612499999999994	22.1
	13.162500000000001	8.4		22.90625	16.2
	12.56875	7.3		22.243750000000002	24.5
	11.862499999999999	10.9		20.499999999999996	30.8
	11.837499999999999	14.4		20.306250000000002	33.8
	12.39375	16.3		21.993749999999995	33.7
	13.53125	16.2		22.3125	35.2
	13.75	15.9		22.7625	28.9
	14.137500000000003	12.3		23.962500000000006	26.7
	14.0375	14.3		23.924999999999997	30.1
	13.537500000000001	17.1		22.356250000000003	34.4
	13.9375	19.6		22.65625	34
	14.512500000000001	21.7		23.393750000000004	31.9
	14.7875	21.3		23.24375	33.3
	13.850000000000001	18		22.325000000000003	36.8
Jun.	13.74375	20		22.65	27.5
	13.856250000000003	15		23.537499999999998	28.7
	14.51875	14.1		23.300000000000004	29
	14.8375	16.7		25.087500000000002	30.5
	15.906249999999998	16.1		25.837499999999995	28.9
	15.2375	15		26.731250000000003	26.8
	16.15625	15.2		27.312500000000004	28
	16.65	14.6		26.918749999999996	26.6
	17.0625	17.4		25.8	22.6
	16.837499999999995	15.6		27.849999999999994	29
	17.35625	15.7		27.23125	31.2
	16.45625	18.1		26.18125	25.3
	16.793750000000003	17.8		25.349999999999998	23.3
	16.95	15.9		26.23125	27
	17.69375	17.3		27.706249999999997	31.3
	17.96875	15.2		27.95	35.7
	18.418750000000003	20.7		27.762500000000003	38.7
	18.8125	24.9		27.293749999999996	40.4
	18.275	26.8		28.375000000000004	39.9
	17.78125	24.7		27.6375	35
	18.362499999999997	21.4		29.28125	26.2
	19.306250000000002	18.4		29.987500000000004	25
	19.156250000000004	16.8		28.431250000000006	21.3
	18.943749999999998	17		28.174999999999997	30.8
	18.3625	18.9		26.975	36.7
	18.20625	22		27.049999999999997	30.8
	18.3	17.7		27.337500000000002	30.6
	19.15625	16.7		28.368750000000002	30
	18.675	16.3		28.06875	31.2
	19.0875	21.1		27.38125	37.1
Jul.	19.218749999999996	23.4		28.306250000000002	34.4
	19.549999999999994	18.6		29.36875	34.7
	20.05625	16.9		29.85625	29.6
	19.78125	16		28.325	27.5
	19.681250000000002	19.8		30.581249999999997	30.2
	20.0625	14.3		29.9375	31.3
	19.612499999999997	15.7		28.956249999999997	31.6
	19.10625	19.4		28.98125	30.8
	18.968750000000004	15.1		28.049999999999997	28.9
	18.8875	14.4		27.90625	30.5
	18.506249999999998	15.3		26.231250000000006	28.2
	18.26875	11.9		27.693749999999994	24.2
	19.03125	11.9		28.7125	25.8
	19.412499999999998	18		29.118750000000002	29.1
	19.40625	19.4		29.262500000000003	25.4
	18.918749999999996	17.6		27.71875	21.1
	17.831250000000004	16.6		28.518749999999997	28.3
	18.33125	17.8		26.618749999999995	32.5
	18.34375	21.1		27.96875	33.1
	18.61875	19.9		27.65	28.2
	19.34375	16.8		29.125	33.5
	18.9125	17.6		27.7875	34
	18.31875	21.4		28.637500000000003	33.9
	18.5875	24.1		27.050000000000004	38.2
	18.637500000000003	22.1		26.906249999999996	33.4
	18.624999999999996	21.2		27.593749999999993	32.7
	18.325	19.1		27.856250000000003	33.7
	18.8125	20.9		27.362500000000004	34.6
	19.06875	17.6		28.593750000000004	32.4
	19.431250000000002	19.7		27.300000000000004	29
	18.231250000000003	16.9		27.168749999999996	30.5
Aug.	17.83125	15.1		26.206249999999997	28.8
	17.906249999999996		15	26.16875		27.7
	18.525000000000002		17.4	27.1625		20.9
	18.38125		16.1	26.900000000000002		26.2
	18.075		16.7	26.95625		30.9
	18.168750000000003		20	26.95		27.8
	17.7875		18.2	26.58125		27.1
	17.79375		17.8	25.95625		25.9
	17.03125		18.8	24.856250000000003		24.6
	16.5875		17.5	26.45		26.6
	17.975		18.2	26.84375		26.5
	17.88125		17.9	28.35625		27.8
	17.4375		17.2	26.23125		26.1
	16.431250000000006		16.9	25.306249999999995		25.6
	17.43125		17.1	26.81875		25.4
	17.462500000000002		16.9	27.218749999999996		26.9
	17.125		17.4	26.850000000000005		26.9
	16.525		17.1	25.625		24.8
	16.69375		16.4	26.08125		25.3
	16.831249999999997		16.8	26.131250000000005		25.9
	16.64375		16.7	26.249999999999996		26
	16.63125		16.6	25.34375		25.2
	16.9375		16.9	24.924999999999997		24.4
	15.993750000000002		16	24.443749999999998		24.4
	16.262500000000003		16.1	24.906250000000004		25
	15.84375		15.8	24.15		23.9
	15.51875		15.7	23.412500000000005		22.2
	16		15.1	25.156250000000004		24.7
	15.418750000000001		15.4	23.75		23.1
	14.931249999999999		15.6	23.34375		24.1
	14.806249999999999		15.2	24.09375		24.1
Sep.	14.481250000000001		14.2	23.93125		23
	13.500000000000002			21.925
	12.98125			22.23125
	14.10625			22.737500000000004
	13.7875			21.656250000000004
	13.06875			21.287499999999998
	13.543750000000001			21.475
	13.5375			21.731250000000003
	13.837499999999999			22.0125
	13.687500000000002			21.831249999999994
	13.6			21.33125
	14.16875			22.099999999999998
	13.637500000000001			22.606249999999996
	14.05			22.60625
	13.9			21.006249999999998
	12.506249999999998			18.506249999999998
	11.824999999999998			19.20625
	11.525000000000002			18.5
	11.21875			17.749999999999996
	11.93125			18.656249999999996
	11.712499999999999			18.125
	11.24375			19.456249999999997
	12.043750000000001			21.51875
	11.712499999999997			19.306250000000002
	10.556249999999997			17.79375
	10.093749999999998			17.85625
	10.268749999999999			17.49375
	9.837499999999999			17.61875
	9.675			16.99375
	9.881249999999998			16.925
Oct.	9.55625			17.6375
	9.08125			16.825
	8.281250000000002			16.2875
	7.45			15.275
	6.93125			15.943749999999998
	8.931250000000002			17.75
	9.00625			17.281250000000004
	9.681249999999999			17.00625
	8.325			15.625000000000002
	7.9125000000000005			14.48125
	8.3			15.281249999999998
	7.581250000000001			13.712499999999999
	7.2125			13.993749999999999
	6.775			13.75625
	7.31875			12.962500000000002
	6.2749999999999995			12.612499999999999
	5.793749999999999			13.99375
	5.9312499999999995			13.587500000000002
	5.6375			13.431250000000002
	4.3500000000000005			13.15625
	4.39375			11.69375
	5.26875			13.287499999999998
	6.149999999999999			13.437500000000002
	6.2875000000000005			13.906250000000002
	4.2562500000000005			11.093750000000002
	4.09375			11.587500000000002
	3.84375			11.91875
	3.5062499999999996			10.749999999999998
	3.80625			12.531249999999998
	2.7125			10.075
	1.5687499999999999			8.325
Nov.	1.83125			8.86875
	2.6625			9.65625
	2.6437500000000003			9.875000000000002
	1.8562499999999995			9.474999999999998
	0.9125			8.26875
	1.1812500000000004			7.550000000000001
	0.21875			7.54375
	1.2437500000000001			7.500000000000001
	0.7562499999999999			7.625
	0.09999999999999995			7.418750000000001
	1.46875			8.4
	1.2625			8.725
	2.00625			8.7375
	0.41874999999999984			7.106249999999999
	0.11249999999999988			6.0625
	-0.6187499999999999			7.1
	1.1624999999999999			7.362500000000001
	1.2937500000000002			7.606250000000001
	0.9937499999999999			7.0874999999999995
	-0.85			5.29375
	-0.275			6.79375
	0.3500000000000002			7.462500000000001
	-1.3625			4.24375
	-3.15625			2.8249999999999993
	-1.04375			5.2875000000000005
	-0.76875			5.15625
	-1.4375			5.5874999999999995
	-1.6000000000000003			5.76875
	-1.6999999999999997			5.1312500000000005
	-1.8374999999999997			4.78125
Dec.	-1.98125			4.8625
	-1.7375			3.6625000000000005
	-2.6625			3.5875
	-1.53125			4.40625
	-3.0875			3.7375
	-3.2125			2.8625000000000003
	-2.28125			4.2562500000000005
	-0.5937500000000001			5.95625
	-1.7874999999999999			5.012499999999999
	-2.06875			3.2
	-2.7875000000000005			3.3125
	-2.04375			3.4312499999999995
	-2.7249999999999996			3.95625
	-2.5187500000000007			5.324999999999999
	-2.7500000000000004			2.79375
	-3.2875000000000005			2.8687500000000004
	-2.6			3.0133333333333336

Max Temp.

Historic Max Temp.

Min Temp.

Historic Min Temp.

Yearly Summary 2026

40°C

Highest Temp

2 Jul. 26

-18°C

Lowest Temp

31 Jan. 26

Seasonal Breakdown

Hottest MonthAugust32.57°C

Coldest MonthFebruary-7.41°C

Wettest MonthMarch9.4mm

Windiest MonthMarch21.07km/h

Boston Climate Change InsightsSee how climate patterns are evolving over time. Temperature shifts, rainfall trends, and extreme events—all in one place.

Weather City Ranking GloballyExplore Real time of the world’s hottest & Coldest Cities based on current temperature data.

Frequently Asked Questions

1. What is the hottest month in Boston historically?

July is historically Boston's hottest month, with average maximum temperatures around 28°C. During peak heatwave events, the highest recorded temperatures have reached 40°C on 2026-07-02.

2. What is the coldest month in Boston historically?

January is Boston's coldest month, with average minimum temperatures around -5°C. The all-time record low of -25°C was recorded on 2016-02-14.

3. What is the average annual rainfall in Boston over the past 17 years?

Boston's average annual rainfall is approximately 1257.4mm, based on records spanning 17 years.

4. How many rainy days does Boston experience on average per year?

Boston historically records approximately 170.8 rainy days per year. December has the highest number of rain days at an average of 14.5 days.

5. What is the all-time highest temperature ever recorded in Boston?

The all-time highest temperature recorded in Boston is 40°C on 2026-07-02.

6. What is the all-time lowest temperature ever recorded in Boston?

The all-time lowest temperature recorded in Boston is -25°C on 2016-02-14.

7. What is the windiest time of year in Boston historically?

Boston experiences its strongest winds during January. The historic gust record of 54.4 kph was recorded on 2012-10-29.

8. What is the highest and lowest humidity in Boston during a year?

Usually, Boston's humidity peaks in February at around 76.6% and drops to its lowest in April at approximately 68.8%.

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Boston Historic Weather Records
Analyse hottest, coldest, windiest & wettest days