December Weather in Saint Lucie, United States

Last updated: February 24, 2025

In December, Saint Lucie experiences a mild climate characterized by an average temperature of 21°C (70°F), with daily highs reaching up to 29°C (85°F) and lows dipping to a refreshing 8°C (47°F). This month sees 54 mm (2.1 in) of precipitation spread over approximately 10 days, contributing to the region's lush landscapes. With humidity levels at a high 84%, visitors can expect a subtly tropical feel, making December an inviting time to enjoy the natural beauty and local attractions of Saint Lucie.

December Temperature in Saint Lucie

In December, temperatures in Saint Lucie, United States, showcase a mild, pleasant transition into winter. With average lows around 8°C (47°F) and highs reaching 29°C (85°F), the month strikes a lovely balance that appeals to both locals and visitors. This slight dip from the warmer months is accompanied by an overall average temperature of 21°C (70°F), setting a comfortable scene for outdoor activities. As the year wraps up, December's weather remains inviting, echoing the consistent warmth typical of Florida while hinting at the cooler days ahead.

December Weather in Saint Lucie: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Saint Lucie, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec677172757881828282807470
Data source: Temperature data for Saint Lucie 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 Saint Lucie

December in Saint Lucie sees a modest precipitation level of 54 mm (2.1 in), marking a noticeable decline from the earlier months of the rainy season. With 10 days of rain, the month stands out for its relatively lower activity compared to the summer peak, where June through August averaged over 170 mm and nearly a full month of rain. This shift hints at the transition from the intense summer showers to a more tranquil winter climate, creating a pleasant contrast for residents and visitors alike. While December doesn't escape the rain entirely, it offers a brief respite as the year winds down, making room for festive celebrations amidst the gentle drizzle.

December Precipitation Trends in Saint Lucie

The chart displays monthly precipitation patterns in Saint Lucie, 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.
JanFebMarAprMayJunJulAugSepOctNovDec384831691251731751941691338354
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Saint Lucie

In Saint Lucie, December ushers in a slightly higher humidity at 84%, making it one of the most humid months of the year. This increase reflects a trend observed throughout the latter half of the year, where humidity levels hover around the low to mid-80s. Starting from a robust 83% in January, humidity begins to taper off in the spring, reaching its lowest point of 65% in May, before gradually climbing back up. Consequently, while December's humidity may feel quite pronounced, it seamlessly blends into the trend established over the preceding months, indicating that the winter season in this region maintains a notably damp atmosphere.

December Average Humidity in Saint Lucie

This chart illustrates the average monthly humidity levels in Saint Lucie, 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.
JanFebMarAprMayJunJulAugSepOctNovDec83%80%75%68%65%73%77%80%83%83%83%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Saint Lucie

As December arrives in Saint Lucie, the UV Index notably dips to 5, marking a shift to the moderate exposure category. This decrease provides a welcome reprieve from the intense sun of previous months, where extremes were the norm, with indices peaking at 12 in the summer. During December, the burn time extends to 30 minutes, allowing residents and visitors to enjoy outdoor activities with a bit more leeway. This trend of decreasing UV levels signals the start of a gradual transition towards cooler weather, making it an ideal time for sunshine seekers to relish the outdoors without the worry of quick burns. For more information, explore the detailed insights at Saint Lucie UV Index.

Maximum UV Index Levels in Saint Lucie for December

The chart shows the monthly maximum UV Index (UVI) for Saint Lucie 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.
JanFebMarAprMayJunJulAugSepOctNovDec6810111112121211975
Data source: Saint Lucie 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 Saint Lucie

As December rolls into Saint Lucie, the city basks in an impressive 270 hours of sunshine, making it a delightful month for outdoor activities. This marks a notable drop from the sun-drenched summer highs of 335 hours in July and 331 hours in August, yet it still maintains a charming glow compared to the earlier months of the year. With sunshine hours steadily increasing from 208 in January to a peak of 318 in April, the trend reveals that winter sunshine in Saint Lucie offers a welcoming respite from the chill elsewhere. As the year comes to a close, December's embrace of sunshine signals the start of a warm winter, inviting both residents and visitors to indulge in the vibrant natural beauty of this coastal paradise.

Monthly Sunshine Duration in Saint Lucie: December Highlighted

The December sunshine duration represents the total number of hours Saint Lucie 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.
JanFebMarAprMayJunJulAugSepOctNovDec208h259h315h318h315h301h335h331h311h298h263h270h
Data source: Saint Lucie December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Saint Lucie During December

December in Saint Lucie, United States, offers a delightful shift towards sunnier weather, with a 65% chance of sunshine. This notable increase marks a sharp contrast to the summer months, where June, July, and August plunge to as low as 19% to 24% sun exposure. As the year winds down, December stands out not only for its festive ambiance but also for being one of the sunniest months, following the trend of improving daylight as the season transitions. With a significant jump from November's 42%, those looking to bask in sunny days during the holiday season are likely to find their wishes granted.

Percentage of Sunny Days in December in Saint Lucie

The chart illustrates the percentage of sunny days in Saint Lucie 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 Saint Lucie experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec44%55%45%52%51%20%24%20%35%47%42%65%
Data source: Saint Lucie December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Saint Lucie in December

In Saint Lucie, Florida, the daylight duration follows a predictable yet enchanting rhythm throughout the year. As the calendar turns to December, the daylight settles at 10 hours, mirroring the shorter days of January and November. This month, located at the tail end of the year, sees daylight gradually wane, having peaked at 13 hours during the vibrant summer months of May through August. The trend clearly showcases the shifting patterns of sunlight, with the days lengthening from 10 hours in early winter to their long stretches in spring and summer, peaking in the warmth of June. As December unfolds, residents are reminded of the serene beauty of winter's gentle embrace, where the sun's retreat invites cozy evenings and the anticipation of the new year ahead.

Average Daylight Hours in Saint Lucie for December

The chart illustrates the variation in daylight duration in Saint Lucie throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 37m11h 13m12h12h 49m13h 30m13h 50m13h 39m13h 3m12h 16m11h 28m10h 46m10h 25m
Data source: Saint Lucie daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Saint Lucie

As December settles over Saint Lucie, the average wind speed drops to 3.5 m/s (8 mph), signaling the calm of winter. This month experiences a noticeable decline from the brisker winds earlier in the year, particularly from the spring and fall months when gusts often reached 5.0 m/s (11 mph). From a peak in May, the wind gradually softens as we approach the year's end, culminating in December's gentle breezes. This trend mirrors the transition from the warmer summer months, where winds were at their lowest in July and August, creating a rhythmic ebb and flow throughout the seasons. Overall, December provides a serene close to the year, inviting leisurely strolls along the coast under quieter skies.

Average December Wind Speed in Saint Lucie

The chart displays monthly wind speed patterns in Saint Lucie, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.34.94.94.65.04.33.43.63.03.94.73.5 m/s
Data source: Saint Lucie December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Saint Lucie Compares to Other Months

The weather in Saint Lucie 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 Saint Lucie and find detailed weather information for every month.

When comparing the weather in December and January, December tends to be slightly warmer, with average temperatures reaching 21°C (70°F) compared to January's average of 20°C (68°F). December also experiences higher minimum temperatures, dropping to 8°C (47°F) versus January's cooler minimum of 4°C (40°F). Precipitation is more frequent in December, with rain falling on 10 days and totaling 54 mm (2.1 in), while January has fewer rainy days (6) and less precipitation (38 mm or 1.5 in). Humidity levels are nearly identical, with December at 84% and January slightly lower at 83%. For more details on January weather, you can visit Saint Lucie weather in January.

When comparing the weather in December and February, both months exhibit mild temperatures, but February tends to be slightly warmer on average. December records a minimum temperature of 8°C (47°F) and a maximum of 29°C (85°F), while February matches the minimum but has a slightly lower maximum of 28°C (83°F). The average temperature in December is around 21°C (70°F), compared to February's 22°C (71°F). Precipitation levels are relatively similar, with December receiving 54 mm (2.1 in) over about 10 days, while February sees a bit less at 48 mm (1.9 in) across 9 days. Humidity levels are also slightly lower in February at 80%, compared to 84% in December. For a detailed look at February weather patterns in this region, visit Saint Lucie weather in February.

In comparison to March, December experiences slightly cooler temperatures, with average highs around 29°C (85°F) and lows of 8°C (47°F), while March sees a mild increase in temperatures, averaging 31°C (88°F) during the day and 11°C (53°F) at night. December also has higher humidity at 84% and more frequent rainfall across about 10 days, totaling 54 mm (2.1 in), compared to March, which has less rainfall of 31 mm (1.2 in) over just 5 days and a lower humidity of 75%. For more details on March weather, you can refer to Saint Lucie weather in March.

The weather in December features milder temperatures compared to April, with a minimum of 8°C (47°F) and an average of 21°C (70°F) compared to April's minimum of 15°C (58°F) and a higher average of 24°C (75°F). While December experiences slightly less precipitation at 54 mm (2.1 in) over about 10 days, April has a bit more rain, totaling 69 mm (2.7 in) over 9 days. Additionally, December shows higher humidity at 84%, whereas April has a more comfortable humidity level of 68%. For more details, you can check Saint Lucie weather in April.

December weather features milder temperatures, with a minimum of 8°C (47°F) and an average of 21°C (70°F), making it a comfortable month overall. It experiences about 54 mm (2.1 in) of precipitation over 10 days, along with a higher humidity level of 84%. In contrast, May brings warmer conditions with a minimum temperature of 17°C (64°F) and an average of 26°C (78°F), peaking at a maximum of 32°C (90°F). However, May is also rainier, accumulating 125 mm (4.9 in) of precipitation across 15 days, but it has a lower humidity level of 65%. For more detailed insights on May weather, check Saint Lucie weather in May.

In comparing December and June weather, December features milder temperatures with a minimum of 8°C (47°F) and an average of 21°C (70°F), while June is notably warmer with a minimum temperature of 23°C (73°F) and an average of 27°C (81°F). Rainfall also contrasts significantly between the two months; December sees 54 mm (2.1 in) of precipitation over 10 days, whereas June experiences a much wetter climate, with 173 mm (6.8 in) of rainfall across 23 days. Additionally, December's humidity is higher at 84%, compared to June's 73%, resulting in a more comfortable atmosphere during the summer month. For more detailed weather insights, check out Saint Lucie weather in June.

In December, the weather in Saint Lucie features milder temperatures, with averages ranging from a minimum of 8°C (47°F) to a maximum of 29°C (85°F), and a relatively low humidity level of 84%. The month sees about 54 mm (2.1 in) of precipitation over approximately 10 days. In contrast, July brings much warmer conditions, with minimum temperatures starting at 24°C (76°F) and daytime highs reaching up to 33°C (92°F). This peak warmth is accompanied by significantly higher precipitation, totaling 175 mm (6.9 in) spread over 27 days, and a lower humidity of 77%. For a detailed look at July weather, you can visit Saint Lucie weather in July.

When comparing December and August weather, notable differences emerge. December sees milder temperatures, with a minimum of 8°C (47°F) and an average of 21°C (70°F), while August is much warmer, with minimums around 25°C (76°F) and an average of 28°C (83°F). Precipitation patterns also vary significantly; December experiences 54 mm (2.1 in) of rain over about 10 days, in contrast to August, which records a much higher 194 mm (7.6 in) across 27 days, contributing to a noticeably wetter climate. Humidity remains relatively high in both months, at 84% in December and 80% in August, creating a feeling of warmth and dampness. For more detailed insights on August weather specifically, visit Saint Lucie weather in August.

In comparing December and September weather, December typically presents milder temperatures with a minimum of 8°C (47°F) and an average of 21°C (70°F), peaking at 29°C (85°F). In contrast, September is significantly warmer, with minimum temperatures around 24°C (75°F), averaging 28°C (82°F), and a maximum of 33°C (91°F). Additionally, December experiences less precipitation, receiving only 54 mm (2.1 in) over about 10 days, whereas September sees a much higher total of 168 mm (6.6 in) over 23 days, making it wetter and more humid at 83%. For a detailed look at the weather patterns in September, you can visit Saint Lucie weather in September.

In comparing the weather of December to that of October, it is evident that December is characterized by slightly warmer temperatures, with a minimum of 8°C (47°F) and a maximum of 29°C (85°F), while October shows a wider range with a minimum of 13°C (55°F) and a peak of 31°C (88°F). October experiences more precipitation, with a total of 133 mm (5.2 in) over 18 days, compared to December’s 54 mm (2.1 in) across 10 days. Interestingly, humidity levels are comparable, with December at 84% and October at 83%. For more detailed insights into October's weather, you can visit Saint Lucie weather in October.

In comparing the weather of December and November, we observe slight variations in temperature and precipitation. December experiences a minimum temperature of 8°C (47°F) and an average of 21°C (70°F), while November is slightly warmer, with a minimum of 9°C (49°F) and an average of 23°C (74°F). Both months share the same maximum temperature of 29°C (85°F).

Precipitation in December totals 54 mm (2.1 in) across 10 days, which is less than November's 83 mm (3.3 in) over 13 days, indicating that December tends to be drier. Humidity levels remain similar, with December at 84% compared to November's 83%. For more detailed insights into November's weather, you can refer to Saint Lucie weather in November.

Compare Saint Lucie's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Saint Lucie

December in Saint Lucie brings a refreshing shift in weather compared to the hotter, more humid months that precede it. With milder temperatures averaging around 21°C (70°F), this month provides a welcome reprieve from the sweltering heat, making it a favorite among visitors. While occasional rain showers may occur, the overall humidity level decreases slightly, offering a more comfortable atmosphere for outdoor activities. The overall climate during December invites exploration and enjoyment of the beautiful surroundings without the intensity of summer. If you're curious for more details, check the extensive insights on Saint Lucie Climate.