Groton December Weather Averages Massachusetts, United States of America

December Weather Averages for Groton

High Temp	4°C	39°F
Low Temp	-3°C	27°F
Avg Temp	0°C	33°F
Sunshine Hours	170 hours
Rainfall	134.22 mm	5.28 In
Rain days	8 days
Pressure	1018 mb	31 In

Groton December Averages Year by Year

Year	High Temp	Low Temp	Avg Temp	Sunshine Hours	Rainfall	Rain days	Pressure
2009	1°C / 34°F	-6°C / 22°F	-2°C / 28°F	173 hours	141.28 mm / 5.56 In	9 days	1016 mb / 30 In
2010	1°C / 33°F	-5°C / 22°F	-2°C / 28°F	174 hours	105.40 mm / 4.15 In	9 days	1009 mb / 30 In
2011	6°C / 42°F	-1°C / 30°F	2°C / 36°F	219 hours	110.70 mm / 4.36 In	5 days	1020 mb / 31 In
2012	5°C / 40°F	-2°C / 29°F	1°C / 34°F	165 hours	141.45 mm / 5.57 In	10 days	1016 mb / 30 In
2013	2°C / 35°F	-5°C / 23°F	-2°C / 29°F	146 hours	120.54 mm / 4.75 In	11 days	1019 mb / 31 In
2014	4°C / 39°F	-2°C / 29°F	1°C / 34°F	137 hours	116.29 mm / 4.58 In	12 days	1020 mb / 31 In
2015	9°C / 48°F	2°C / 36°F	5°C / 41°F	122 hours	108.26 mm / 4.26 In	8 days	1019 mb / 31 In
2016	3°C / 37°F	-4°C / 25°F	-1°C / 31°F	194 hours	101.07 mm / 3.98 In	8 days	1018 mb / 31 In
2017	1°C / 34°F	-6°C / 20°F	-3°C / 26°F	179 hours	78.66 mm / 3.10 In	6 days	1017 mb / 31 In
2018	4°C / 40°F	-3°C / 27°F	1°C / 33°F	221 hours	88.02 mm / 3.47 In	4 days	1019 mb / 31 In
2019	3°C / 37°F	-4°C / 24°F	-1°C / 31°F	160 hours	212.43 mm / 8.36 In	12 days	1017 mb / 31 In
2020	4°C / 39°F	-3°C / 26°F	0°C / 33°F	127 hours	186.92 mm / 7.36 In	7 days	1016 mb / 30 In
2021	6°C / 42°F	-2°C / 29°F	2°C / 35°F	149 hours	61.10 mm / 2.41 In	10 days	1016 mb / 30 In
2022	5°C / 41°F	-2°C / 28°F	1°C / 34°F	211 hours	130.40 mm / 5.13 In	8 days	1020 mb / 31 In
2023	7°C / 45°F	0°C / 32°F	3°C / 38°F	151 hours	168.56 mm / 6.64 In	7 days	1019 mb / 31 In
2024	3°C / 38°F	-2°C / 28°F	0°C / 32°F	194 hours	276.36 mm / 10.88 In	7 days	1021 mb / 31 In

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