Hawaii weather in December in Celsius is a topic of great interest to those planning a winter getaway or simply wanting to know what to expect from the state’s climate during this time. With its tropical climate, Hawaii experiences mild temperatures year-round, but December is still a great time to escape the cold and enjoy the islands’ sunny weather.
Understanding the climate of Hawaii in December is crucial for planning a trip, and this article will delve into the state’s weather patterns, including temperature fluctuations, precipitation, and sunshine hours. From the warmest islands to the coolest, we’ll explore the best spots to visit during this time.
Understanding Hawaii Weather Patterns in December
Hawaii’s climate in December is generally mild and tropical, with temperatures ranging from the mid-70s to mid-80s Fahrenheit (°F). However, these temperatures can fluctuate significantly depending on the location, elevation, and time of day. The islands’ weather patterns are influenced by trade winds, which bring humidity and precipitation from the northeast and southeast. In this discussion, we’ll explore the overall climate of Hawaii in December, including temperature fluctuations and precipitation patterns, and how these factors contribute to the state’s distinct weather characteristics.
Temperature Patterns in December
Temperature fluctuations are a significant aspect of Hawaii’s weather in December. The average high temperature in Honolulu, the state capital, is around 78°F (25.6°C), while the average low temperature is approximately 70°F (21.1°C). These temperatures are relatively consistent throughout the state, with minor variations depending on the location and elevation. For instance, the higher elevations of Mauna Kea and Mauna Loa on the Big Island tend to be cooler than the coastal areas, with average temperatures ranging from the mid-50s to mid-60s Fahrenheit (13-18°C).
Trade Winds and Their Influence
The trade winds play a crucial role in shaping Hawaii’s weather patterns. These winds bring humidity and precipitation from the northeast and southeast, with the most significant impact on the eastern and southern parts of the islands. The trade winds can also lead to temperature fluctuations, as they bring warm, moist air from the Pacific Ocean and cooler, drier air from the north. This temperature contrast can cause the formation of clouds and precipitation, particularly on the windward sides of the islands.
Average Temperatures in Honolulu
Here’s a more detailed account of the average high and low temperatures in Honolulu, Hawaii, compared to the rest of the state:
| Month | Average High Temperature (°F) | Average Low Temperature (°F) |
| — | — | — |
| December | 78 | 70 |
| January | 78 | 69 |
| February | 79 | 69 |
| March | 80 | 70 |
As you can see, the average high temperatures in Honolulu remain relatively consistent throughout the winter months, while the average low temperatures tend to be slightly cooler.
Comparison to the Rest of the State
While Honolulu’s temperatures are representative of the state’s overall climate, there are significant variations depending on the location and elevation. For instance, the Big Island’s Kona Coast tends to be warmer than Honolulu, with average temperatures ranging from the mid-70s to mid-80s Fahrenheit (°C). In contrast, the higher elevations of Mauna Kea and Mauna Loa on the Big Island tend to be cooler, with average temperatures ranging from the mid-50s to mid-60s Fahrenheit (13-18°C).
Predicting Rainfall in the Hawaiian Islands in December: Hawaii Weather In December In Celsius
December is a great time to experience the tropical climate of Hawaii, with temperatures ranging from 20°C to 25°C (68°F to 77°F). However, the rainfall in Hawaii during this time varies significantly across different islands. Understanding the factors that influence rainfall in Hawaii can help you plan your trip or daily activities more effectively.
Monthly Rainfall Variations Across Hawaiian Islands
The average monthly rainfall in Hawaii in December is relatively low compared to other months. However, the rainfall patterns differ significantly across different islands due to factors like elevation, wind direction, and coastal orientation.
- Honolulu: With an average rainfall of 83 mm (3.3 in), Honolulu experiences relatively low rainfall in December compared to other islands.
- Hilo: The Hilo area on the Big Island receives significantly higher rainfall, averaging around 160 mm (6.3 in) in December, due to its location on the windward coast.
- Kona: The Kona area on the Big Island has a much drier climate, with an average rainfall of 41 mm (1.6 in) in December.
- Maui: The rainfall on Maui is moderate, averaging around 114 mm (4.5 in) in December.
The differences in rainfall across the islands are largely due to the trade winds, which bring moisture from the Pacific Ocean and lead to higher rainfall in the windward coastal areas. The rain shadow effect also plays a crucial role, as the mountains on the islands create a rain shadow that dries out the leeward slopes.
Rainfall Patterns and Orographic Clouds
Orographic clouds are a significant contributor to the rainfall patterns in Hawaii. These clouds form when windward slopes are forced to rise, resulting in the cooling of air and subsequent condensation of water vapor. The resulting clouds can be heavy with rain, causing significant precipitation in the windward areas.
| City | December Rainfall (mm) | % of Annual Rainfall |
|---|---|---|
| Honolulu | 83 | 10% |
| Hilo | 160 | 20% |
| Kona | 41 | 5% |
| Maui | 114 | 15% |
Understanding the relationship between trade winds, rain shadow effects, and orographic clouds can help you better predict rainfall patterns in Hawaii. By recognizing the factors that contribute to regional rainfall variations, you can make informed decisions about your travel plans and daily activities.
Sunshine and UV Radiation in Hawaii in December
December is a great time to enjoy the warm Hawaiian weather, with plenty of sunshine and mild temperatures. However, it’s essential to be aware of the increased risk of sunburn and heat-related illnesses due to the intense UV radiation.
As one of the sunniest states in the US, Hawaii receives a significant amount of sunshine throughout the year. In December, the average daily sunshine hours in Honolulu, Hawaii, are around 8-9 hours. Compared to other Hawaiian islands, the Big Island, Maui, and Kauai receive slightly less sunshine due to their higher latitude and more mountainous terrain.
Risk of Sunburn and Heat-Related Illnesses
While sunshine is a significant factor in Hawaii during December, so is the increased risk of sunburn and heat-related illnesses. It’s crucial to take necessary precautions to protect yourself from the intense UV radiation. The risk of sunburn is higher at higher elevations, such as on the Big Island’s Mauna Kea, due to the thinner atmosphere.
UV Radiation Index in Hawaiian Cities
The UV radiation index is a measure of the intensity of ultraviolet radiation from the sun. In December, the UV radiation index in major Hawaiian cities is as follows:
| City | UV Radiation Index (December 1-31) |
|---|---|
| Honolulu | High (UV Index 9-11) |
| Kahului (Maui) | Moderate to High (UV Index 7-9) |
| Lihue (Kauai) | Moderate (UV Index 5-7) |
| Hilo (Big Island) | Moderate (UV Index 5-7) |
When spending extended periods outdoors, consider taking the following precautions:
* Wear protective clothing, including a wide-brimmed hat and long-sleeved shirt
* Apply broad-spectrum sunscreen with a high SPF rating, every 2 hours
* Seek shade, especially during peak sun hours (10am-4pm)
* Avoid direct sunlight on reflective surfaces, such as water and sand
* Stay hydrated by drinking plenty of water
It’s also essential to be aware of the risks associated with heat-related illnesses, such as heat exhaustion and heat stroke. Symptoms include:
* Heavy sweating
* Pale, cool, and clammy skin
* Fast and weak pulse
* Nausea or vomiting
* Headache
* Dizziness or fainting
If you or someone you know experiences any of these symptoms, seek medical attention immediately.
Remember, sun protection is essential, especially in Hawaii’s intense solar environment.
Tropical Cyclone Activity and Storm Surges in Hawaii
In the context of Hawaii’s December weather, it’s essential to acknowledge the risks associated with tropical cyclones and storm surges. Although Hawaii is located in a tropical region, the likelihood of being directly impacted by a tropical cyclone in December is relatively low. However, storms can still bring powerful winds and potentially severe flooding.
Risk of Tropical Cyclones in December
Tropical cyclones are capable of causing significant damage and disruption, particularly during the late fall and early winter months. According to records from the National Oceanic and Atmospheric Administration (NOAA), the peak tropical cyclone season for the Central Pacific, which includes Hawaii, typically occurs from August to November, with August being the most active month. However, it is not uncommon for a late-season storm to develop and impact the Hawaiian Islands in December.
Storm Surges in Hawaii
Storm surges are a significant concern for coastal communities during tropical cyclones. The Hawaiian Islands’ unique geography, with coral reefs and volcanic coastlines, can contribute to the severity of storm surges. The islands’ shape and orientation can steer storms and funnel them towards shore, increasing the risk of coastal flooding.
Typical Storm Surge Heights in Hawaii
Comparing typical storm surge heights generated by typhoons or hurricanes in Hawaii to those in other Pacific Rim countries highlights the significance of this phenomenon. The following table illustrates this:
| Country | Typical Storm Surge Height (meters) |
| — | — |
| Japan | 0.5-2.5 |
| Philippines | 1-3 |
| Hawaii | 0.5-2 |
| South Korea | 0.5-1.5 |
Impact of Geography on Storm Surges in Hawaii, Hawaii weather in december in celsius
Hawaii’s geography can contribute to the severity of storm surges. The islands’ coral reefs, volcanic coastlines, and the presence of sea mounts can amplify wave heights and increase the risk of coastal erosion. A notable example of this occurred during Hurricane Iniki in 1992, which caused significant damage to the island of Kauai, particularly in areas with high wave runs.
Lessons from Historical Events
Historical events offer valuable insights into the potential consequences of tropical cyclones and storm surges in Hawaii. The 1949 Typhoon Olenna and Hurricane Iniki in 1992 highlight the devastating impact of these events. These episodes demonstrate the importance of preparedness and evacuation measures in protecting lives and property.
Monitoring and Preparation
Understanding the risks associated with tropical cyclones and storm surges in Hawaii is crucial for effective monitoring and preparation. The National Weather Service, NOAA, and other weather forecasting agencies closely monitor tropical cyclone activity and provide timely warnings and advisories to ensure public safety.
Final Review
In conclusion, Hawaii weather in December in Celsius is a great time to visit the islands, with mild temperatures and plenty of sunshine. Whether you’re planning to explore the state’s natural beauty, try water sports, or simply relax on the beach, our guide has provided you with all the information you need to make the most of your trip.
User Queries
What is the average temperature in Hawaii in December?
The average temperature in Hawaii in December ranges from 23°C to 26°C (73°F to 79°F), depending on the island.
Is December a good time to visit Hawaii?
Yes, December is a great time to visit Hawaii, as the weather is mild and perfect for outdoor activities.
Can I expect rain in Hawaii in December?
Hawaii experiences some rainfall in December, but it’s usually light and scattered.
How much sunshine can I expect in Hawaii in December?
Hawaii receives an average of 8-9 hours of sunshine per day in December.
What are the chances of tropical cyclones in Hawaii in December?
The chances of tropical cyclones in Hawaii in December are relatively low, but it’s always best to check the forecast before traveling.
