December typically marks the beginning of the wetter season on the Island of Hawaii. Average temperatures range from highs in the low 80s Fahrenheit (high 20s Celsius) during the day to lows in the low 70s Fahrenheit (low 20s Celsius) at night, although microclimates across the island create significant variations. Coastal regions tend to be warmer and drier, while higher elevations experience cooler temperatures, potentially dropping below freezing at the summits of Mauna Kea and Mauna Loa. Rainfall becomes more frequent, especially on the windward (east) side of the island. Ocean conditions can become rougher during this period, potentially affecting coastal activities.
Understanding typical climatic conditions is crucial for planning travel and activities. Packing for a range of weather conditions, including rain gear and layers, ensures comfort and preparedness. The increased rainfall revitalizes the landscape, enhancing the lush scenery and creating spectacular waterfalls. Historically, this wetter period was significant for traditional Hawaiian agriculture, replenishing water sources and supporting the growth of essential crops. This seasonality continues to influence local agricultural practices and cultural traditions.
