December in Hawaii represents a significant shift from the summer peak, offering travelers a chance to experience the islands with slightly cooler air and fewer crowds. While the misconception of constant 85-degree weather persists, the reality is more nuanced, with temperatures varying by location and elevation. Understanding the average conditions is essential for packing the right clothes and planning activities that suit the season.
Breaking Down the Temperature Averages
The most accurate way to answer the question of the average temperature is to look at the data rather than a single number. Because the archipelago spans over 1,500 miles, the climate in Honolulu differs greatly from the conditions on the windward slopes of Maui or the shores of the Big Island. December serves as the beginning of the "winter" season, or "Kau" in Hawaiian, bringing the highest rainfall of the year to many regions.
Specific Island Data
The Trade Wind Factor
While the numbers provide a baseline, the "feels like" temperature is heavily influenced by the steady trade winds that sweep across the islands. These consistent breezes create a natural air conditioning effect, making the mid-80s Fahrenheit highs comfortable rather than oppressive. Conversely, the same winds can make the evening lows feel cooler than the thermometer suggests, particularly on the coastlines and in more exposed areas.
