The highest day temperature in December 2024 was 58°F. The lowest night temperature was 32°F. The average values for day and night temperatures during December were 46.5°F и 42.2°F respectivly.

The average sea surface temperature in December 2024 for St Constantine and Helena was 51.1°F. The maximum and minimum values were 46.8°F and 54.8°F respectively.

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

Precipitation total in December for St Constantine and Helena is 1.2 in.

The average wind speed in December is 11.3 mph. It makes December one of the most windy months of the year for St Constantine and Helena.

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 St Constantine and Helena in December is 4.8 hours.