Weather in December in Groton, Ct

< December >
	Normal Max/ High Temperature	5°C (42°F)
	Average Temperature	1°C (33°F)
	Min/ Low Temperature	-4°C (24°F)
	Normal Precipitation	118mm (4.6in)
	Average Daylight per day	09h 16'
	Sun altitude at solar noon on the 21st day.	25.6°

• The average temperature in Groton, Ct in December is very cool at 0.6 °C (33.08 °F).
• Afternoons can be cool with average high temperatures reaching 5.4 °C (41.7 °F).
• Overnight temperatures are generally slightly cold with an average low of -4.3 °C (24.3 °F).
• In December the variation/ range of diurnal average temperatures is 9.7 °C (17.5 °F).
• Precipitation averages for December are high with 118.1mm (4.6 in) recorded.
• The shortest day is 9h 13' long and the longest day is 9h 25' long with an average length of 9h 16'.

Weather Trend Graph for December in Groton, Ct, Usa