The highest day temperature in December 2023 was 42°F. The lowest night temperature was 20°F. The average values for day and night temperatures during December were 33.5°F и 32.5°F respectivly.

The average sea surface temperature in December 2023 for Mackinac Island was 37.1°F. The maximum and minimum values were 34.8°F and 39.2°F respectively.

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

Precipitation total in December for Mackinac Island is 0.7 in. It makes december one of the least rainy months of the year.

The average wind speed in December is 13.0 mph. It makes December one of the most windy months of the year for Mackinac Island.

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 Mackinac Island in December is 2.4 hours.