The highest day temperature in December 2025 was 46°F. The lowest night temperature was 16°F. The average values for day and night temperatures during December were 36.1°F и 32.3°F respectivly.

The average sea surface temperature in December 2025 for Lagan was 40.3°F. The maximum and minimum values were 38.0°F and 41.8°F respectively.

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

Precipitation total in December for Lagan is 0.7 in. It makes december one of the most rainy months of the year.

The average wind speed in December is 13.7 mph. This value is relatively stable throughout the year.

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 Lagan in December is 3.8 hours.