December weather forecast and climate
Greenwich, CT

What is the temperature in December in Greenwich?

In December, in Greenwich, Connecticut, the average high-temperature is 41°F (5°C), and the average low-temperature is 27°F (-2.8°C).

How much does it rain in Greenwich in December?

Throughout December, in Greenwich, Connecticut, 4.3" (109.5mm) of precipitation is accumulated.

How much does it snow in Greenwich in December?

In Greenwich, in December, typically 5.2" (132.1mm) of snow is accumulated.
Average temperature in December - Greenwich, CT
  • Average high temperature in December: 41°F

The warmest month (with the highest average high temperature) is July (83°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in December: 27°F

The month with the highest average low temperature is July (65°F).
The coldest month (with the lowest average low temperature) is January (21°F).

Average rainfall in December - Greenwich, CT
  • Average rainfall in December: 4.3"

Wettest months (with the highest rainfall) are March and September (4.7").
The driest month (with the lowest rainfall) is February (3.2").

Average snowfall in December - Greenwich, CT
  • Average snowfall in December: 5.2"

The month with the highest snowfall is February (8.3").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average sea temperature in December - Greenwich, CT
  • Average sea temperature in December: 47.1°F

The best month for swimming (with the highest average sea temperature) is August (73.1°F).
The coldest month (with the lowest average sea temperature) is February (39.5°F).

Average daylight in December - Greenwich, CT
  • Average daylight in December: 9.3h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.3h).

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