The highest day temperature in December 2023 was 60°F. The lowest night temperature was 29°F. The average values for day and night temperatures during December were 48.0°F и 39.8°F respectivly.

The average sea surface temperature in December 2023 for Washington was 45.0°F. The maximum and minimum values were 42.4°F and 50.0°F respectively.

You can expect various weather conditions during December. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in December for Washington is 2.4 in.

The average wind speed in December is 7.4 mph.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Washington in December is 5.1 hours.