December Weather in Key Largo, United States

Last updated: February 24, 2025

In December, Key Largo experiences a delightful tropical climate, with an average temperature of 23°C (74°F), peaking at a comfortable 27°C (80°F). The evenings cool down to a minimum of 14°C (57°F), creating a pleasing contrast. However, this month also brings a touch of rain, with 44 mm (1.7 in) of precipitation spread across 8 days, leading to a humidity level of 81%. Despite the occasional showers, December remains an inviting time for visitors to enjoy the area's stunning scenery and vibrant marine life.

December Temperature in Key Largo

In Key Largo during December, temperatures begin to cool slightly as winter approaches, but the climate remains comfortably mild. With minimum temperatures around 14°C (57°F), an average of 23°C (74°F), and maximums reaching 27°C (80°F), this month offers a delightful escape from the chill experienced in many other regions. Comparatively, December's weather reflects a gradual trend from the warmer, humid summer months, assuring visitors of pleasant days and cooler nights. This makes it an ideal time for outdoor activities and enjoying the scenic beauty that the Florida Keys have to offer, striking a perfect balance for those seeking a winter getaway without harsh temperatures.

December Weather in Key Largo: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Key Largo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec717474777981838382817774
Data source: Temperature data for Key Largo generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Key Largo

December in Key Largo sees a moderate precipitation amount of 44 mm (1.7 in), marking a decrease from the noticeably wetter months preceding it. This month's rainfall typically occurs across about 8 days, contributing to a relatively mild wet season when compared to the peak of 179 mm (7.1 in) in September. Interestingly, as the year draws to a close, December's precipitation is notably lower than both the several summer months and the rain-heavy May, creating a trend that emphasizes the transition from the lush rainy season to the drier winter months. With these patterns, December offers a balance, inviting visitors to enjoy the beauty of Key Largo while experiencing a more stable climate as the New Year approaches.

December Precipitation Trends in Key Largo

The chart displays monthly precipitation patterns in Key Largo, with values for each month alongside December's data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December's conditions compare to those of other months.
JanFebMarAprMayJunJulAugSepOctNovDec313527471551121031081801428244
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Key Largo

In Key Largo, December wraps up the year with humidity levels at 81%, mirroring January’s figures and reflecting a notable trend of higher moisture in the winter months. Throughout the year, humidity shows a gradual decline from a peak of 81% in December and January down to a more comfortable 69% in June. The summer months of July and August experience a slight uptick, but the overall trend signals a gradual release of humidity as the year progresses. This cycle culminates as the year ends, inviting visitors to enjoy the lush, tropical atmosphere that Key Largo is renowned for, making it a perfect escape during the winter season.

December Average Humidity in Key Largo

This chart illustrates the average monthly humidity levels in Key Largo, with December's data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, allowing you to see how December's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec81%80%76%73%71%70%70%72%76%79%80%81%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Key Largo

In December, Key Largo experiences a UV Index of 6, placing it in the high exposure category with a burn time of 25 minutes. This marks a notable decline from the extreme levels seen during the summer months, particularly from June to September when values peaked at 13. As the year winds down, the UV radiation decreases, providing a reprieve from the harsher sun. However, even with a lower index, it's still important for sun seekers to remain vigilant and protect their skin. For those looking to plan their days outdoors, understanding the UV trends can significantly enhance sun safety practices—check out the full details at Key Largo UV Index.

Maximum UV Index Levels in Key Largo for December

The chart shows the monthly maximum UV Index (UVI) for Key Largo in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues.
JanFebMarAprMayJunJulAugSepOctNovDec69111212131212121086
Data source: Key Largo December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

December Sunshine in Key Largo

In Key Largo, December brings a delightful respite from the holiday hustle, with 290 hours of sunshine painting the picturesque island in warm, golden hues. As the year winds down, sunlight steadily ebbs from the summer peak of 347 hours in July, yet remains abundant compared to the earlier months. This trend showcases the region's unique ability to blend vibrant warmth with a hint of winter charm. Visitors can indulge in outdoor activities, bask under the sun, and revel in the balmy temperatures, while the holiday spirit and cheerful ambiance create an inviting atmosphere. In December, Key Largo is truly a sun-soaked paradise, just waiting to be explored.

Monthly Sunshine Duration in Key Largo: December Highlighted

The December sunshine duration represents the total number of hours Key Largo experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec228h283h329h338h329h319h347h342h317h305h281h290h
Data source: Key Largo December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Key Largo During December

When considering the likelihood of sunny weather in December in Key Largo, it's encouraging to note that the chances peak at a robust 69%. This marks a significant increase as the year draws to a close, especially when compared to the summer months, where sunshine dips to as low as 16% in June. Transitioning from November's 46%, the sunny disposition of December heralds a welcome change, aligning with the brighter outlook seen in the earlier months, such as February and March, which both boast high probabilities of sun at 67% and 66% respectively. Overall, December stands out as a prime month for those in search of bright, sunny days, making it an ideal time to enjoy the natural beauty of Key Largo.

Percentage of Sunny Days in December in Key Largo

The chart illustrates the percentage of sunny days in Key Largo throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Key Largo experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec42%67%66%58%57%16%26%28%34%50%46%69%
Data source: Key Largo December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Key Largo in December

In Key Largo, the rhythm of daylight duration reveals a charming seasonal pattern. Starting with 10 hours in January, the days gradually lengthen, peaking at 13 hours between May and July. This extended daylight invites outdoor adventures and beach relaxation during the summer months. As autumn arrives, daylight gradually reverts to 10 hours by December, creating a gentle cyclical transition back to shorter, cozier days. The consistent ebb and flow of sunlight throughout the year not only enhances the island's beauty but also influences the vibrant local lifestyle enjoyed by residents and visitors alike.

Average Daylight Hours in Key Largo for December

The chart illustrates the variation in daylight duration in Key Largo throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 45m11h 18m12h 1m12h 45m13h 21m13h 39m13h 29m12h 57m12h 15m11h 31m10h 54m10h 35m
Data source: Key Largo daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Key Largo

As December unfolds in Key Largo, the gentle breeze of the season settles in with an average wind speed of 4.7 m/s (11 mph), marking a subtle dip from the previous months. The wind has been gradually tapering off since the summer peak in July, where it reached 4.2 m/s (9 mph), suggesting a calming transition into winter. With the winter months typically experiencing lighter winds, December's flow provides a serene backdrop for enjoying the picturesque tropical environment. This trend of decreasing wind speeds from the earlier months highlights the tranquility that envelops the region, making it an inviting time for relaxation and outdoor activities in this sun-drenched paradise.

Average December Wind Speed in Key Largo

The chart displays monthly wind speed patterns in Key Largo, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec5.06.26.45.75.65.34.24.93.25.05.34.7 m/s
Data source: Key Largo December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Key Largo Compares to Other Months

The weather in Key Largo changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Key Largo and find detailed weather information for every month.

In December, the weather in Key Largo showcases a warm and humid climate, with average temperatures ranging from a minimum of 14°C (57°F) to a maximum of 27°C (80°F). The month experiences a notable 44 mm (1.7 in) of precipitation over about 8 days, contributing to the lush tropical atmosphere. In contrast, January tends to be slightly cooler, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 26°C (80°F) and a lower total precipitation of 31 mm (1.2 in) over just 6 days. Despite the minor drop in temperature and rainfall, January maintains the same high humidity level of 81%. For more detailed information, check out Key Largo weather in January.

In December, the weather features a comfortable range, with minimum temperatures around 14°C (57°F) and an average of 23°C (74°F), peaking at 27°C (80°F). Precipitation is slightly higher, totaling 44 mm (1.7 in) over about 8 days, coupled with high humidity at 81%. In contrast, February experiences a similar minimum temperature of 14°C (57°F) and an average of 23°C (74°F), but with a slight decline in maximum temperature to 26°C (80°F). Rainfall decreases to 35 mm (1.4 in) over 7 days, and humidity remains slightly lower at 79%. For more detailed information, you can check out Key Largo weather in February.

In December, the weather is characterized by a warm temperature range, with a minimum of 14°C (57°F), an average of 23°C (74°F), and a maximum of 27°C (80°F). This month also experiences higher humidity levels at 81% and more frequent rainfall, totaling 44 mm (1.7 in) over approximately 8 days. In contrast, March sees slightly warmer minimum temperatures of 15°C (59°F) and a similar average of 23°C (74°F), but with a maximum temperature slightly lower at 26°C (80°F). Precipitation is reduced significantly in March, with only 27 mm (1.0 in) of rain over 4 days and lower humidity at 76%. For more details on March weather specifically, visit Key Largo weather in March.

December and April share relatively warm temperatures, with December having a minimum of 14°C (57°F) and an average of 23°C (74°F), while April sees slightly warmer readings with a minimum of 17°C (64°F) and an average of 25°C (77°F). Both months experience similar precipitation levels, with December recording 44 mm (1.7 in) over 8 days and April slightly higher at 47 mm (1.8 in) over 9 days. Humidity is noticeably higher in December at 81%, compared to April's more comfortable 73%. For more detailed information on April weather, check out Key Largo weather in April.

In December, temperatures range from a mild minimum of 14°C (57°F) to a comfortable maximum of 27°C (80°F), with an average of 23°C (74°F). The month experiences moderate precipitation of 44 mm (1.7 in) over about 8 days, accompanied by high humidity levels at 81%. In contrast, May brings warmer conditions with temperatures ranging from a minimum of 21°C (70°F) to a maximum of 29°C (84°F), averaging 26°C (79°F). The month sees significantly more rainfall at 155 mm (6.1 in) spread over 13 days, and the humidity dips to 71%. For more details on the weather during this month, you can check Key Largo weather in May.

December and June offer contrasting weather conditions. In December, temperatures range from a minimum of 14°C (57°F) to a maximum of 27°C (80°F), with an average around 23°C (74°F). The month experiences 44 mm (1.7 in) of precipitation over about 8 days, accompanied by relatively high humidity at 81%. In contrast, June is warmer, with temperatures ranging from a minimum of 24°C (75°F) to a maximum of 30°C (87°F), and an average of 27°C (82°F). Rainfall increases significantly, totaling 112 mm (4.4 in) across approximately 18 days, but humidity is lower at 69%. For more details, you can check Key Largo weather in June.

When comparing the weather in December and July, it's clear that both months bring distinct characteristics. December features milder temperatures, with a minimum of 14°C (57°F) and an average of 23°C (74°F), while July offers warmer conditions, starting at a minimum of 25°C (78°F) and averaging 28°C (83°F). Precipitation is also notably different; December sees about 44 mm (1.7 in) of rain over 8 days, whereas July experiences higher rainfall, totaling 103 mm (4.1 in) over 17 days. Additionally, humidity levels are higher in December at 81%, compared to a lower 70% in July, contributing to a more comfortable atmosphere in the summer month. For more details on July weather specifics, check out Key Largo weather in July.

In December, the weather is generally milder, with temperatures ranging from a minimum of 14°C (57°F) to a maximum of 27°C (80°F), and an average temperature of 23°C (74°F). This month experiences about 44 mm (1.7 in) of precipitation over approximately 8 days, coupled with a higher humidity level of 81%. In contrast, August brings significantly warmer temperatures, ranging from a minimum of 25°C (78°F) to a maximum of 30°C (87°F), with an average of 28°C (83°F). However, it is also much wetter, with 108 mm (4.3 in) of rainfall spread over 18 days, while maintaining a slightly lower humidity of 72%. For more details on August weather, you can visit Key Largo weather in August.

In comparing the weather between December and September, it's clear that December offers milder temperatures, with a minimum of 14°C (57°F) and an average of 23°C (74°F), while September is notably warmer with minimum temperatures starting at 25°C (77°F) and an average of 28°C (83°F). September also experiences significantly higher precipitation, totaling 179 mm (7.1 in) over 18 days compared to December's 44 mm (1.7 in) spread across just 8 days. Additionally, while December's humidity is higher at 81%, September maintains a slightly lower humidity level of 76%. For more detailed insights, you can check out the Key Largo weather in September.

In comparing the weather between December and October, it's evident that October is typically warmer, with average highs reaching 29°C (85°F) compared to December's max of 27°C (80°F). October also sees higher minimum temperatures, with a low of 18°C (65°F) versus December's 14°C (57°F). Precipitation is significantly more common in October, totaling 142 mm (5.6 in) over 18 days, while December experiences only 44 mm (1.7 in) across 8 days. Humidity levels are quite similar, at 79% for October and 81% for December. For more detailed information on October weather, you can visit Key Largo weather in October.

In comparing the weather between November and December, December tends to be slightly cooler with average temperatures ranging from a minimum of 14°C (57°F) to a maximum of 27°C (80°F), while November has a higher average, peaking at 28°C (83°F). December also experiences less precipitation, with 44 mm (1.7 in) over 8 days compared to November’s 82 mm (3.2 in) across 11 days. Humidity levels remain relatively similar, at 81% in December and 80% in November, suggesting a comfortable but slightly drier month in December. For more details on November weather, you can check Key Largo weather in November.

Compare Key Largo's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Key Largo

As December settles into Key Largo, the weather begins to shift, offering a refreshing reprieve from the sweltering summer months. With milder temperatures and an increase in humidity, this month embraces a more comfortable atmosphere, making it perfect for outdoor activities. Although rain may make an appearance on about eight days, the overall lower precipitation levels compared to the summer months contribute to clearer skies and enjoyable days. Whether you're a local or a visitor, this seasonal transition invites you to explore the beauty of the Florida Keys. For more detailed insights into what to expect, check out Key Largo Climate.