The highest day temperature in December 2023 was 38°F. The lowest night temperature was -2°F. The average values for day and night temperatures during December were 22.3°F и 19.3°F respectivly.

The average sea surface temperature in December 2023 for Sillamäe was 35.0°F. The maximum and minimum values were 32.6°F and 38.6°F respectively.

Most of the days in December are gloomy but you can also expect sunny days.

Precipitation total in December for Sillamäe is 2.1 in.

The average wind speed in December is 12.0 mph. It makes December the most windy month of the year for Sillamäe.

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 Sillamäe in December is 1.3 hours.