December Weather Key West FL, the city’s coldest months bring a range of temperature fluctuations, humidity levels, and wind patterns that make for a unique climate. The temperatures during December typically range from highs of 77-78°F (25-26°C) to lows of 64-65°F (18-18°C), with an average humidity level of 71-75%. The wind patterns in Key West during December are generally consistent, with average wind speeds ranging from 10-15 mph (16-24 km/h), primarily coming from the east.
The city’s climate is influenced by its location in the subtropics, which means it experiences a mild winter and a hot, humid summer. Compared to other months, December is relatively cool, with the lowest average temperature being in January and the highest in July. The average precipitation level in December is around 2.6 inches (66 mm), which is relatively dry compared to the wettest month, September.
December Weather in Key West, Florida
December in Key West, Florida marks the beginning of the cooler months, although the temperatures are still relatively mild compared to other parts of the United States. As the winter solstice approaches, Key West experiences a decrease in temperatures, with average highs ranging from the mid-70s to mid-80s Fahrenheit (23-30°C).
Temperature Fluctuations
The temperature fluctuations between day and nighttime in December are quite pronounced. On average, the daily high temperature ranges from 75°F (24°C) to 82°F (28°C) throughout the month, while the nighttime low temperature drops to around 62°F (17°C) to 65°F (18°C). This difference can be attributed to the ocean’s moderating influence on the land temperatures, as well as the island’s geographical location near the equator. The average low temperature in December is approximately 12°F (6.7°C) lower than the average high temperature.
Humidity Levels
Key West experiences relatively high humidity levels throughout the year, with an average relative humidity of around 64% in December. This high humidity can contribute to the overall feeling of warmth, even during the cooler months. The relative humidity in December typically peaks in the early morning hours and decreases throughout the day as the temperatures rise. However, it’s essential to note that the humidity levels in Key West remain relatively stable throughout the year and are not significantly affected by the changing seasons.
Wind Patterns
Key West is influenced by various wind patterns, including trade winds, frontal systems, and the occasional subtropical low-pressure system. The trade winds, which blow from the northeast, prevail in Key West during the winter months and can contribute to a cooling effect on the island. The average wind speed in December is about 14 mph (23 km/h), with gusts often reaching up to 25 mph (40 km/h). These winds can help disperse the high humidity and create a more comfortable atmosphere.
Humidity-Affecting Factors, December weather key west fl
Several factors contribute to the high humidity levels in Key West during December. These include:
- Proximity to the ocean: The ocean’s high water temperature during December (around 72°F or 22°C) contributes to the high humidity levels in the air.
- Rainfall: While December is generally a dry month in Key West, occasional rain showers can temporarily increase the humidity.
- Plant life: The dense vegetation and lush plant life in Key West contribute to the high humidity by releasing moisture into the air through transpiration.
Comparing December Weather in Key West, Florida, to Other Months
December is a relatively cool and dry month in Key West, Florida. The average temperature hovers around the mid-70s (°F), which is an ideal time for tourists and residents alike. When compared to other months, December’s weather patterns are quite unique, with some months experiencing even cooler or warmer temperatures.
Months with the Highest and Lowest Average Temperatures
In Key West, the months with the highest and lowest average temperatures are quite distinct. The hottest month is typically August, with an average high temperature of 90°F (32°C) and an average low temperature of 77°F (25°C). On the other hand, the coldest month is January, with an average high temperature of 73°F (23°C) and an average low temperature of 62°F (17°C). This contrast highlights the significant fluctuations in temperature throughout the year.
- August: The hottest month in Key West, with average temperatures reaching 90°F (32°C) during the day and 77°F (25°C) at night. This period is characterized by long days with 13 hours of direct sunlight.
- January: The coolest month in Key West, with average temperatures ranging from 73°F (23°C) during the day to 62°F (17°C) at night. This time of year is marked by shorter days with 10 hours of direct sunlight.
Average Precipitation Levels in December and Comparison to Driest and Wetter Months
Key West experiences a relatively dry climate, with the majority of its precipitation occurring during the summer months. December, being a part of the dry season, has an average precipitation of 2.7 inches (69 mm), which is significantly lower than the wettest month of August, which receives an average of 9.6 inches (243 mm).
- December: An average of 2.7 inches (69 mm) of precipitation, with the majority of it falling during the first half of the month.
- August: The wettest month in Key West, with an average of 9.6 inches (243 mm) of precipitation.
Comparison of Climate Data for Each Month of the Year
To better understand the patterns in Key West’s climate, a comparison of climate data for each month of the year is essential. The following table highlights the average high and low temperatures, precipitation levels, and other relevant climate data for each month.
| Month | Average High (°F) | Average Low (°F) | Precipitation (inches) |
|---|---|---|---|
| January | 73 | 62 | 2.3 |
| February | 74 | 63 | 2.1 |
| March | 79 | 67 | 2.5 |
| April | 82 | 69 | 3.1 |
| May | 85 | 72 | 3.9 |
| June | 88 | 75 | 5.1 |
| July | 90 | 77 | 5.9 |
| August | 90 | 77 | 9.6 |
| September | 88 | 75 | 7.4 |
| October | 84 | 72 | 5.8 |
| November | 80 | 69 | 4.5 |
| December | 78 | 67 | 2.7 |
December Weather Trends and Variations in Key West, Florida: December Weather Key West Fl
Key West, Florida, experiences a subtropical climate year-round, characterized by mild winter temperatures and high humidity levels. During December, the average temperature ranges from 68°F to 76°F (20°C to 24°C), making it an ideal time to visit the island for those seeking a warm winter getaway.
Impact of El Niño and La Niña Events
El Niño and La Niña events can significantly impact winter weather patterns in Key West, Florida. These natural climate phenomena occur when there are fluctuations in the surface temperature of the Pacific Ocean, affecting global climate patterns and precipitation levels. In Key West, El Niño conditions often lead to above-average temperatures and precipitation, while La Niña conditions can result in cooler temperatures and reduced rainfall. The National Oceanic and Atmospheric Administration (NOAA) closely monitors these events, providing essential data for understanding their impact on winter weather patterns in Key West.
- Key Factors to Consider:
In addition to the average temperature and precipitation levels, other factors, such as wind direction and humidity, are also affected by El Niño and La Niña events. Understanding these patterns is crucial for making informed decisions about travel, outdoor activities, and agriculture.
El Niño and La Niña events can bring significant changes to Key West’s climate, affecting everything from fishing and boating to tourism and agriculture.
Climate Change and Average Temperature Levels
Climate change is also impacting the average temperature levels in Key West during the winter months. According to the National Centers for Environmental Information (NCEI), Key West’s annual average temperature has risen by nearly 1°F (0.5°C) since the 1970s. This warming trend is consistent with global climate change patterns and may lead to more frequent heatwaves and extreme weather events. Rising sea levels and more intense hurricanes also pose significant challenges for the island’s infrastructure and ecosystems.
1971-1980: 64.8°F (18.2°C)
1981-1990: 66.3°F (19.1°C)
1991-2000: 67.9°F (19.9°C)
2001-2010: 69.5°F (20.8°C)
2011-2020: 71.1°F (21.7°C)
Key West’s warming trend is part of a broader pattern of climate change affecting the entire planet.
Impact of Hurricanes on Winter Weather Patterns
Hurricanes can significantly impact winter weather patterns in Key West, Florida, especially during the late summer and early fall months. While the official hurricane season ends in November, late-season storms can still occur. In recent years, the National Hurricane Center (NHC) has reported several late-season storms affecting the Caribbean and Southeastern United States, including Hurricane Eta in 2020 and Hurricane Iota in 2020. Understanding the potential risks and preparedness measures is crucial for protecting life and property in Key West.
Winter Holiday Activities in Key West, Florida, under December Weather
December in Key West, Florida, is a wonderful time for outdoor holiday activities, as the mild weather conditions provide an ideal atmosphere for tourists to enjoy the island’s natural beauty. With average highs in the mid-70s to mid-80s Fahrenheit (23-30°C), December is an excellent time to explore the island’s beaches, waterways, and historic sites.
Sailing and Water Activities
Sailing, fishing, and other water activities are popular winter holiday activities in Key West, Florida, during December. The warm ocean waters invite tourists to indulge in snorkeling, kayaking, or paddleboarding, making the most of the weather conditions. Many charter boats and sailing companies offer guided tours and rentals for visitors to explore the island’s marine life and scenic coastline.
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• Visitors can enjoy snorkeling and scuba diving in the warm waters of the Atlantic Ocean, observing the diverse marine life and coral reefs.
• Kayaking and paddleboarding are great ways to explore the island’s mangroves and shallow waters, providing a unique perspective on the island’s wildlife and ecosystems.
• Fishing charters offer a chance to catch a variety of fish species, including tarpon, barracuda, and snapper.
Special Events and Festivals
December is also a time for special events and festivals in Key West, with many activities taking place in celebration of the holiday season. The nice weather conditions contribute to the success of these events, drawing large crowds to the island. Some of the popular events include:
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• The Ernest Hemingway Home and Museum’s Holiday Decorations – This event features the historic home decorated with festive lights and decorations, paying tribute to Hemingway’s legacy.
• The Key West Lighted Parade – This festive parade features floats, marching bands, and decorated boats, all lit up with thousands of lights and decorations.
• The Key West Christmas Festival – This annual festival offers a range of activities, including live music, crafts, and food vendors, all set in a festive holiday atmosphere.
Clothing and Accessories
When packing for a December trip to Key West, Florida, it’s essential to consider the weather conditions, including the humidity and temperature fluctuations. Visitors should bring clothing and accessories that are comfortable, lightweight, and suitable for the warm to mild temperatures.
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• Lightweight cotton clothing and breathable fabrics are ideal for comfortable walking and outdoor activities.
• Visitors should also bring layers for cooler mornings and evenings, including light jackets or sweaters.
• Don’t forget to pack sunscreen, sunglasses, and a hat to protect yourself from the sun.
• Comfortable walking shoes are a must, with sandal options also being suitable for warm weather.
• A light rain jacket or poncho can come in handy for unexpected rain showers.
Conclusive Thoughts
Key West’s December weather is perfect for outdoor activities like sailing, fishing, and beach walking. The city also hosts various events and festivals during this time, such as the Key West Holiday Parade and the Bahama Village Music Festival. To make the most of your visit, be sure to pack accordingly, bringing light clothing, a light jacket or sweater for cooler evenings, and sunscreen to protect yourself from the sun.
Detailed FAQs
Q: What is the average temperature in December in Key West FL?
A: The average temperature in December ranges from 77-78°F (25-26°C) during the day and 64-65°F (18-18°C) at night.
Q: How humid is the air in Key West FL in December?
A: The humidity level in Key West during December is around 71-75%.
Q: What is the average precipitation level in December in Key West FL?
A: The average precipitation level in December is around 2.6 inches (66 mm).
Q: Are there any outdoor activities to do in Key West FL in December?
A: Yes, December is a great time for outdoor activities like sailing, fishing, and beach walking.
