December in Hawaii marks the beginning of the wetter season, characterized by cooler temperatures and increased rainfall. While “winter” is a relative term in these islands, average daytime temperatures typically range from the high 70s to low 80s Fahrenheit (mid-20s to high 20s Celsius). Nighttime temperatures can dip into the 60s Fahrenheit (teens Celsius), particularly at higher elevations. Ocean temperatures remain pleasant for swimming, generally hovering in the mid-70s Fahrenheit (low 20s Celsius). However, conditions can vary significantly between islands and even within different regions of the same island. Coastal areas tend to be warmer and drier, while mountainous regions experience more pronounced temperature drops and higher levels of precipitation.
Understanding typical December conditions is crucial for planning a Hawaiian vacation. Travelers can pack appropriately, anticipating the possibility of both sunshine and rain. This awareness allows visitors to choose activities best suited to the prevailing weather, from surfing and sunbathing on clear days to exploring museums and cultural sites when showers arrive. Historically, December has marked a period of transition in Hawaii, moving from the drier summer months to the wetter winter season. This shift has influenced traditional practices related to agriculture and fishing, reflecting the islands’ deep connection to the natural world.
