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

Groton Weather Trend Graph

Temperature (°C)

Months

Months	Historic Min Temp.	Min Temp.	Forecasted Min Temp.	Historic Max Temp.	Max Temp.	Forecasted Max Temp.
	-0.08749999999999986	-4.1		5.20625	-0.6
	-1.8187499999999999	-6.5		4.762499999999999	-2
	-3.0625	-5.2		2.91875	1.3
	-2.25625	-3.6		3.8312500000000003	2.2
	-2.8250000000000006	-7.8		3.4	-1
	-3.15625	1		2.4499999999999993	2.7
	-4.55625	1.7		1.4000000000000001	6.7
	-4.81875	0.4		1.51875	6.2
	-3.5124999999999997	-3.8		2.1937499999999996	6.4
	-2.7312499999999993	3.4		4.375	7.9
	-1.61875	1.2		4.237500000000001	6.8
	0.07500000000000015	-1.7		6.681250000000001	2.8
	-1.61875	0.6		5.7875	6.1
	-2.9624999999999995	4.2		2.73125	6.9
Jan.	-3.225	-4		2.425	5.3
	-2.875000000000001	-4.9		3.6749999999999994	0.5
	-2.6062499999999997	0.9		2.69375	2.5
	-2.40625	-0.8		3.94375	1.5
	-2.0750000000000006	-2.2		3.825	0.9
	-4.10625	-7.5		2.95625	-1.9
	-5.575000000000001	-7.6		-0.08749999999999991	2.4
	-5.76875	1.2		0.5000000000000001	3.9
	-4.1375	-3.7		1.8874999999999997	0.8
	-4.231249999999999	-13.6		2.35625	-8.3
	-3.1312499999999996	-10.6		3.6812499999999995	-5
	-2.2062500000000003	-6.9		3.0562499999999995	0.1
	-2.3062500000000004	-10.6		3.9625000000000004	-4
	-3.0937499999999996	-9.9		2.65	-2.7
	-4.2625	-10.3		1.95625	-3.6
	-5.6625	-13		1.4000000000000004	-6.5
	-5.375	-13.1		1.0749999999999997	-5.1
	-3.2249999999999996	-9.1		3.4187499999999997	-4.1
	-3.35	-10.4		3.9	1.2
	-3.6624999999999996	-10.3		2.275	-1.8
	-3.41875	-4		3.81875	1.7
	-3.50625	-7.4		3.7187499999999996	0.5
	-3.79375	-8.2		2.4687499999999996	-3
	-2.56875	-12		3.9499999999999997	-1.4
	-3.4125000000000005	-17.4		3.2125	-6.8
	-4.925000000000001	-14.1		2.1812500000000004	0.1
	-2.7875000000000005	-8.4		2.9625	-0.6
	-3.6624999999999996	-2.2		3.0124999999999997	2.9
	-4.625	-3.8		2.9937500000000004	2.9
	-4.5062500000000005	-7.4		2.03125	2.9
	-4.900000000000001	-1.7		2.15	4.1
Feb.	-4.36875	-2.6		3.3375	2.8
	-2.10625	-1.8		5.125	5.3
	-2.9499999999999993	-0.2		3.35	2.6
	-3.8375000000000004	-0.1		3.59375	1.8
	-3.8687500000000004	-0.6		4.2375	3.2
	-3.018749999999999	0.6		3.275	1.8
	-2.2375	-0.2		4.3812500000000005	2.5
	-1.525	-0.4		5.743750000000001	1.7
	-0.4562500000000001	-3.6		6.106250000000001	-0.4
	-0.7562499999999999	-4.7		6.2875000000000005	1.3
	-0.93125	-6.4		5.300000000000001	2.6
	-2.58125	-2.5		3.6750000000000003	4.7
	-2.125	-4		4.781250000000001	4
	-1.4062499999999998	-2.5		4.8062499999999995	1.8
	-1.3	-3.1		6.124999999999999	0.8
	-1.86875	-7.3		5.01875	-1.6
	-3.3062500000000004	-4.3		4.1000000000000005	1.7
	-1.95625	-1.3		4.187500000000001	8.7
	-1.7812499999999998	-3		4.6875	1.9
	-1.9250000000000003	1.2		5.025	3.3
	-1.5187499999999998	1.1		5.45	4.9
	-0.575	1.3		6.88125	10
	0.31875000000000014	0.9		7.9	5.7
	0.7125000000000001	1.4		7.818750000000001	5.3
	1.7874999999999996	3.8		8.737499999999999	7.6
	1.1687500000000002	-0.3		8.3375	8.8
	-0.39374999999999993	-1.4		6.6187499999999995	3.3
	1.24375	2.9		8.025	9
Mar.	1.4687500000000002	-0.3		7.3875	3.9
	0.5687500000000001	4.2		7.674999999999999	10.5
	0.65	0.7		8	10.7
	1.44375	-3		9.075000000000001	0.6
	1.0624999999999998	-1.3		7.7875	5
	1.35	2.2		8.65	7.5
	2.4437500000000005	4.1		8.94375	10.6
	1.1312499999999999	4.1		8.568749999999998	7.1
	0.25	1.6		7.068750000000001	6.2
	1.75	-0.8		8.762500000000001	7.8
	2.0875000000000004	2		8.743749999999999	6.7
	1.9249999999999998	5		8.6875	8.8
	0.23749999999999993	5.3		7.9	10.8
	1.36875	-0.8		8.412500000000001	2.5
	2.76875	-1.7		9.731250000000001	7.5
	2.54375	4.9		9.556249999999999	11.2
	3.0187500000000003	7.5		9.643749999999999	12.8
	2.96875	9.4		10.0875	20.9
	1.9249999999999998	3.5		9.05625	5.9
	3.41875	4		10.45625	11.7
	3.5250000000000004	5		11.006249999999998	18.6
	3.3312500000000003	4.6		10.61875	14.6
	3.162499999999999	2.8		10.868750000000002	10.5
	3.8312500000000003	0.6		10.9625	13.6
	4.54375	-0.8		11.625000000000002	9.8
	3.4249999999999994	-1.1		11.374999999999996	8.2
	4.43125	-0.8		11.76875	14.3
	5.06875	5.3		13.01875	18.8
	6.1625	2.4		13.031249999999996	14.1
	6.6812499999999995	6.4		13.9875	20.7
	7.5062500000000005	10.2		15.29375	26.3
Apr.	5.8812500000000005	11.7		13.325000000000003	28.4
	6.0125	12		12.643749999999999	30.3
	6.2250000000000005	12.8		13.424999999999997	24.3
	5.00625	8.4		13.100000000000001	18.1
	6.3	3.1		13.3375	11.4
	6.45	0.4		14.081249999999999	9.9
	6.093749999999999	-0.2		13.35625	10
	6.19375	2.7		13.8375	7.5
	6.04375	4.2		13.425	22.7
	6.343750000000001	5.7		14.125	16.9
	6.91875	2		13.24375	12.7
	7	5.2		13.637500000000001	13.6
	6.38125	3.4		12.887499999999998	21.6
	6.250000000000001	5.1		13.981250000000001	19.6
	6.925	5.4		14.649999999999999	17.9
	7.231249999999999	8.5		14.7	11.2
	7.206249999999999	4.9		14.96875	19.3
	8.7625	7		16.518749999999997	11.9
	8.94375	3.6		16.39375	14.4
	9.325	4.7		16.01875	21.6
	8.71875	7.8		15.725000000000001	22
	8.9375	10.7		15.475000000000001	21
	8.48125	8.2		16.093750000000004	19.9
	8.9	5.6		16.85625	17.1
	8.5	6.8		15.237499999999999	20.4
	9.15625	10.9		16.81875	17.2
	9.512500000000001	9.6		17.206249999999997	20.9
	8.86875	6.2		16.924999999999997	19
	8.65625	7.5		15.912500000000003	21.7
	8.868749999999999	10.9		16.787499999999998	15.2
May	10.368750000000002	9.1		18.2125	17
	11.5375	7.6		18.587500000000002	24.3
	11.100000000000001	13.8		19.14375	30.2
	10.893749999999999	16		18.65625	26.4
	11.0125	15.2		18.03125	31.1
	11.118749999999999	14.9		18.993750000000002	24.5
	11.16875	10.6		19.331249999999997	18.1
	11.41875	8.5		18.5625	22.2
	11.725	8.4		19.425	18.6
	11.35	9.6		19.58125	13.4
	11.212499999999997	13.1		19.01875	19.4
	12.431249999999999	12.3		21.56875	25.6
	13.143749999999999	14.8		21.818750000000005	28.3
	12.956250000000002	13.6		19.76875	24.1
	13.012500000000001	11.3		20.587500000000002	24.9
	13.418749999999998	7.5		21.075000000000003	11.7
	13.55625	4.9		21.931250000000002	22.9
	13.118749999999999	10.7		21.174999999999997	19.2
	13.1	7.1		21.05	27.3
	12.425	10.2		19.918750000000003	29.3
	12.337499999999999	11.5		19.7	30
	12.78125	14.1		20.58125	33
	13.68125	15.5		21.1875	32.2
	13.85	16.9		21.481249999999996	29.7
	14.4875	13.2		22.34375	24.1
	14.262499999999998	12		22.20625	27.3
	14.312499999999998	14.4		22.1	27.6
	14.524999999999999	18.2		21.8875	34
	14.850000000000001	20.4		21.375	34.7
	15.21875	19.4		22.15625	33
	14.149999999999997	17.8		21.818750000000005	32.3
Jun.	13.981250000000001	16		21.625	28
	14.450000000000001	12.8		22.456249999999997	26.9
	15.356249999999998	14		22.824999999999996	26.4
	15.062500000000002	16.1		22.74375	29.5
	15.4875	16.8		23.487499999999997	28.1
	15.8875	15.5		23.6	28.2
	16.618750000000002	14.3		24.375000000000004	29.8
	16.9875	15.3		24.8625	25.7
	17.112499999999997	18.7		25.043750000000006	23.3
	17.375	16		25.837499999999995	29.8
	17.431250000000002	15.4		25.8125	30.7
	17.08125	17.9		25.187499999999996	24.7
	17.068749999999998	18.3		23.962500000000002	30.5
	17.575	18.2		24.668749999999996	28.2
	17.781250000000004	17.9		25.887500000000003	31.9
	18.425	18.2		25.962500000000002	32.4
	18.743750000000002	20.1		26.281250000000004	34
	18.631249999999998	21.8		25.875	37.9
	18.61875	24.4		26.6125	38.9
	18.14375	23.1		26.387500000000003	36.6
	18.59375	20.2		26.693749999999998	28.3
	19.93125	18.1		27.881249999999998	23.7
	19.912499999999998	16.8		26.849999999999998	21.8
	20.162499999999998	16.5		26.981250000000003	29.4
	19.53125	18.3		26.46875	31.9
	19.087500000000002	21.5		26.174999999999997	33.1
	19.09375	19.4		26.275	31.4
	20.037499999999998	16.2		26.906249999999996	31.8
	19.475	16		26.624999999999996	30.5
	19.78125	20.9		25.962500000000002	34.4
Jul.	20.043749999999996	22.2		27.356250000000003	34.6
	20.31875	20.2		27.225	33.2
	20.487499999999994	16.9		27.756249999999994	31.9
	20.41875	17.6		27.425000000000004	29.8
	20.2375	18		28.243749999999995	27.8
	20.818750000000005	14.7		28.218750000000004	28.1
	20.237499999999997	16.7		27.575000000000003	26.1
	19.674999999999994	20.6		27.843749999999996	29.5
	20.000000000000004	15.7		26.943749999999998	28.2
	20.1125	14.7		27.231250000000003	29.3
	19.674999999999997	14.3		26.2	29.5
	19.075	12.9		26.962499999999995	29.8
	19.806250000000002	14.6		27.568749999999998	27.9
	20.331249999999994	19.8		28.2125	28.1
	20.08125	20		27.331249999999997	24.4
	19.149999999999995	19.6		27.137500000000003	25
	18.631249999999998	17.2		26.8875	29.5
	19.2625	19		25.75	30.8
	18.84375	21.3		26.599999999999998	29.2
	19.43125	20.2		25.9875	25.9
	19.99375	17.2		27.35625	28.9
	19.35625	16.5		26.537499999999998	28.7
	19.212500000000002	22.7		26.85	30.2
	19.631249999999998	22.6		25.90625	34.8
	19.06875	21.4		26.049999999999997	33.6
	19.0125	22.5		26.6375	32.9
	19.287500000000005	18.3		26.85	33
	19.293750000000003	20.9		26.031250000000004	32.9
	19.418750000000003	19.3		26.462500000000006	32.4
	19.787499999999998	19.9		26.13125	29.3
	19.075	17.9		26.087500000000002	30.4
Aug.	18.706249999999997	16.2		26.025	25.1
	18.999999999999996		15.8	26.256249999999998		25
	19.525		18.9	26.356249999999996		23.5
	19.25625		17.3	26.499999999999993		25.8
	18.731250000000006		19.2	25.993749999999995		26.6
	18.900000000000002		20.7	26.4375		26.9
	18.64375		18.7	25.687500000000004		25.7
	18.850000000000005		20	25.55625		25
	17.687499999999996		20.8	25.075000000000003		27.6
	17.750000000000004		18.3	25.074999999999996		25.6
	18.812499999999996		19.1	26.012500000000003		26
	18.75625		18.7	26.737499999999997		26.6
	18.24375		17.9	25.700000000000003		25.9
	17.2		17.7	25.21875		25.1
	18.418750000000003		17.9	25.88125		25
	18		17.3	26.043750000000003		25.7
	18.05625		18.3	26.1625		26
	17.3125		17.3	25.0625		24.8
	17.4875		17	24.79375		24.6
	17.45		17.1	25.006250000000005		24.7
	17.45625		17.5	24.981249999999996		25.1
	17.774999999999995		17.8	24.48125		24.3
	17.393749999999997		17.4	23.7375		23.8
	16.956250000000004		16.8	23.700000000000003		23.5
	16.8375		16.6	24.38125		24.4
	16.025		16	23.225		23.3
	16.29375		16.4	23.581249999999997		23
	17.08125		16.2	24.643749999999997		24.2
	16.50625		16.5	23.30625		23
	15.88125		16.5	23.018749999999997		23.2
	15.63125		15.9	23.025000000000002		23.5
Sep.	15.41875		14.7	23.449999999999996		22.6
	14.231250000000003			21.874999999999996
	13.762500000000001			21.7875
	14.875			22.125
	14.931249999999999			22.2875
	14.431249999999999			22.018749999999997
	14.856249999999998			21.412499999999998
	14.625000000000002			21.931250000000002
	14.456249999999999			21.750000000000004
	14.5625			21.849999999999998
	14.418750000000001			21.268749999999997
	15.131249999999998			22.150000000000002
	14.25625			21.925
	15.2125			21.5875
	15.043750000000001			21.406250000000004
	13.506250000000001			19.75
	12.66875			19.3625
	12.68125			19.61875
	12.45			18.4125
	13.037500000000001			19.4
	12.5625			18.84375
	12.868750000000002			19.66875
	13.374999999999998			20.7625
	12.9125			19.53125
	12.006249999999998			18.24375
	11.243750000000004			18.125
	12.200000000000001			18.643749999999997
	10.475			17.868750000000002
	10.881249999999998			17.58125
	11.124999999999998			17.58125
Oct.	11.0625			17.937499999999996
	10.350000000000001			17.275000000000002
	9.168750000000001			16.818749999999998
	8.475			15.612500000000002
	8.8875			15.987499999999999
	10.6625			17.75
	10.69375			18.012500000000003
	10.70625			17.1125
	9.79375			16.381249999999998
	9.518749999999999			15.1875
	9.925			15.924999999999999
	9.075000000000001			14.887499999999998
	8.706249999999999			14.8375
	8.3875			15.35625
	8.2			13.887500000000001
	7.737500000000001			13.893749999999997
	7.9125000000000005			14.412499999999998
	7.312500000000001			13.962500000000002
	7.73125			13.968750000000002
	5.8812500000000005			13.762500000000001
	6.1125			13.012500000000001
	6.7749999999999995			13.806249999999999
	7.79375			14.043750000000003
	7.562500000000001			13.9375
	4.9624999999999995			11.4875
	5.09375			12.6125
	5.425			12.63125
	5.2			11.712499999999999
	5.437499999999999			13.387500000000001
	4.15			10.812499999999998
	2.9499999999999997			9.249999999999998
Nov.	3.4562499999999994			9.86875
	4.7125			11.049999999999999
	4.0125			10.906249999999998
	3.81875			10.1125
	2.9125000000000005			9.712499999999999
	2.6250000000000004			8.91875
	2.30625			8.874999999999998
	3.025			9.40625
	2.31875			8.518749999999999
	1.9875			8.762500000000001
	3.3562499999999997			9.531249999999998
	3.4625			10.4
	3.89375			10.275
	2.0875			7.825000000000001
	1.8625000000000003			7.712499999999999
	1.7000000000000002			8.56875
	3.04375			9.124999999999998
	2.9499999999999997			8.881250000000001
	2.6812500000000004			8.487499999999999
	0.9500000000000001			7.193750000000001
	2.1500000000000004			7.96875
	2.86875			8.837499999999999
	0.6124999999999998			5.300000000000001
	-0.65			5.0875
	1.50625			6.58125
	0.9312499999999999			6.687500000000001
	1.0999999999999999			6.35625
	0.6375000000000001			6.91875
	0.006250000000000089			6.362500000000001
	-0.21250000000000002			5.9
Dec.	0.03749999999999992			6.1000000000000005
	0.50625			5.131249999999999
	-0.11874999999999984			5.631250000000001
	-0.01874999999999999			5.437500000000001
	-1.46875			5.20625
	-1.11875			4.325
	0.35625			5.66875
	1.4499999999999997			7.174999999999999
	0.12499999999999985			6.6312500000000005
	-0.38749999999999984			4.543749999999999
	-0.1562499999999999			5.218749999999999
	-0.5750000000000001			5.1625
	-1.05625			5.2562500000000005
	-0.7375			6.5125
	-0.2437500000000002			4.78125
	-0.7875			4.46875
	-0.03333333333333328			4.62

Max Temp.

Historic Max Temp.

Min Temp.

Historic Min Temp.

Yearly Summary 2026

39°C

Highest Temp

3 Jul. 26

-17°C

Lowest Temp

8 Feb. 26

Seasonal Breakdown

Hottest MonthAugust30.54°C

Coldest MonthFebruary-5.19°C

Wettest MonthMarch10.31mm

Windiest MonthJanuary28.65km/h

Groton 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 Groton historically?

July is historically Groton's hottest month, with average maximum temperatures around 27°C. During peak heatwave events, the highest recorded temperatures have reached 39°C on 2026-07-03.

2. What is the coldest month in Groton historically?

January is Groton's coldest month, with average minimum temperatures around -3°C. The all-time record low of -22°C was recorded on 2016-02-14.

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

Groton's average annual rainfall is approximately 1414.7mm, based on records spanning 17 years.

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

Groton historically records approximately 172.3 rainy days per year. December has the highest number of rain days at an average of 14.6 days.

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

The all-time highest temperature recorded in Groton is 39°C on 2026-07-03.

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

The all-time lowest temperature recorded in Groton is -22°C on 2016-02-14.

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

Groton experiences its strongest winds during January. The historic gust record of 64.1 kph was recorded on 2026-02-23.

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

Usually, Groton's humidity peaks in July at around 79.03% and drops to its lowest in November at approximately 71.4%.

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Groton Historic Weather RecordsAnalyse hottest, coldest, windiest & wettest days

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Yearly Summary 2026

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Recent Blogs On Weather

World Top 10 Hottest Cities Are All in India Again - May 2026

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