December Weather in Saint Augustine South, United States

Last updated: February 24, 2025

In Saint Augustine South, United States, December offers a mild yet refreshing climate for residents and visitors alike. Daily maximum temperatures reach up to 26°C (78°F), while the average temperature settles at a comfortable 17°C (63°F). However, nights can be quite chilly with minimum temperatures dipping to 4°C (39°F). This month also experiences moderate precipitation, totaling 70 mm (2.7 in) across approximately 8 days, resulting in an 84% humidity level that envelops the area in a soft, sea-kissed chill. Whether exploring the historic sites or enjoying the coastal beauty, December's weather provides an inviting atmosphere for all.

December Temperature in Saint Augustine South

In Saint Augustine South, United States, December ushers in a noticeable shift towards cooler temperatures, with minimums averaging around 4°C (39°F). The month strikes a balance with a comfortable average of 17°C (63°F), making it an ideal time to enjoy outdoor activities without the sweltering heat of summer. As the year comes to a close, daytime highs can reach up to 26°C (78°F), allowing residents and visitors to indulge in mild, inviting weather. This trend reflects a gradual transition from the warmer months, offering a refreshing respite and a perfect backdrop for festive celebrations. Overall, December's climate creates a pleasant and enjoyable environment, bridging the warmth of autumn and the cooling embrace of winter.

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

The chart illustrates December temperature patterns in Saint Augustine South, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec596365707680818281776863
Data source: Temperature data for Saint Augustine South 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 Augustine South

In December, Saint Augustine South experiences a precipitation total of 70 mm (2.7 in), marking a decrease from the wetter summer months where rainfall often peaks. With about 8 days of rain, this month serves as a transition to the drier winter season. The rainfall pattern gradually declines from the heavily saturated summer months, particularly July and September, which see averages exceeding 160 mm. Despite the dip in precipitation, December maintains a moderate level of moisture compared to the earlier fall months, ensuring the landscape remains vibrant as the year comes to a close. Overall, December illustrates a shift toward drier days ahead, while still holding onto a notable share of the Florida charm.

December Precipitation Trends in Saint Augustine South

The chart displays monthly precipitation patterns in Saint Augustine South, 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.
JanFebMarAprMayJunJulAugSepOctNovDec47613482771431611461631239270
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Saint Augustine South

In Saint Augustine South, December ushers in a peak in humidity levels, with averages reaching 84%. This marks a notable increase from November's 82% and showcases a trend of ascending humidity as the year draws to a close. Throughout the year, humidity generally fluctuates, beginning at a high of 83% in January and dipping to its annual low of 68% in May. However, as the calendar progresses towards winter, moisture levels rise again, peaking in December. This cyclical pattern reflects the region's subtropical climate, characterized by moist air that becomes increasingly evident during the later months of the year, creating a distinctly humid atmosphere perfect for those cozy winter days.

December Average Humidity in Saint Augustine South

This chart illustrates the average monthly humidity levels in Saint Augustine South, 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%70%68%75%80%81%83%81%82%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Saint Augustine South

In December, the UV Index in Saint Augustine South drops back to a moderate level of 5, offering a reprieve from the extreme indices seen in the summer months. With a burn time of 30 minutes, this is a significant improvement compared to the peak UV levels observed from April through September, which often hovered around 11 or 12. This seasonal shift highlights the importance of adjusting sun protection strategies, particularly as outdoor activity tends to increase during the festive season. As the year comes to a close, residents and visitors alike can enjoy the milder sun exposure while still being mindful of the midday rays. For more detailed information on UV levels throughout the year, visit Saint Augustine South UV Index.

Maximum UV Index Levels in Saint Augustine South for December

The chart shows the monthly maximum UV Index (UVI) for Saint Augustine South 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.
JanFebMarAprMayJunJulAugSepOctNovDec589111112111111975
Data source: Saint Augustine South 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 Augustine South

Saint Augustine South enjoys a remarkable array of sunshine throughout the year, with December basking in 246 hours of radiant daylight. While this figure is slightly lower than the peak months of May and July, which boast over 328 hours, December still maintains a cheerful glow, making it a cozy winter retreat. The trend reveals a gradual decline in sunlight from the summer’s vibrant highs, with August and September trailing closely behind before the year winds down. This consistent sunshine, even in winter, showcases the region’s appealing climate, inviting visitors to experience the charm of Saint Augustine South all year round.

Monthly Sunshine Duration in Saint Augustine South: December Highlighted

The December sunshine duration represents the total number of hours Saint Augustine South 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.
JanFebMarAprMayJunJulAugSepOctNovDec205h237h302h303h328h305h334h319h301h288h249h246h
Data source: Saint Augustine South December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Saint Augustine South During December

In December, Saint Augustine South experiences a notable uptick in sunny weather, with a 52% chance of sun that outshines the preceding months. This trend marks the beginning of a brighter season, breaking away from the sunniest streaks of the year, which typically occur in the spring. Compared to the lower sun probabilities found in the scorching summer months, December offers a refreshing shift as the year winds down. While the chance of encountering a cloudy day remains, the increasing likelihood of sunny skies in December invites residents and visitors alike to embrace the charming holiday spirit amidst milder temperatures and vibrant festive activities.

Percentage of Sunny Days in December in Saint Augustine South

The chart illustrates the percentage of sunny days in Saint Augustine South 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 Augustine South experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec42%44%40%50%50%21%21%17%36%46%45%52%
Data source: Saint Augustine South December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Saint Augustine South in December

In Saint Augustine South, December marks the end of the year with a consistent 10 hours of daylight, mirroring the daylight duration of both January and November. This seasonal trend highlights a gradual decline in daylight that begins in late autumn and stabilizes as winter approaches. January and February see a slight increase in daylight, transitioning from the darker months, while the longest days occur in June, with 14 hours of sunlight. As the seasons shift towards spring, daylight begins to lengthen, peaking in May with 13 hours before gradually tapering off again. Overall, the daylight duration in Saint Augustine South reveals a clear pattern of cyclical variation, providing a rhythmic charm to the region's annual climate.

Average Daylight Hours in Saint Augustine South for December

The chart illustrates the variation in daylight duration in Saint Augustine South throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 27m11h 8m12h12h 54m13h 39m14h13h 49m13h 9m12h 17m11h 24m10h 38m10h 15m
Data source: Saint Augustine South daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Saint Augustine South

In December, Saint Augustine South experiences a gentle breeze, with an average wind speed of 3.4 m/s (8 mph). This marks a notable decrease from the brisk winds of November, which recorded an average of 4.3 m/s (10 mph). Overall, the winter months tend to offer a calmer atmosphere, as January to April maintain an average in the 3.8 to 4.4 m/s range. This trend reveals a significant drop-off during the summer, where wind speeds fall to their lowest, particularly in July and August at only 3.2 m/s (7 mph). As the year winds down, December's breezes invite a tranquil yet refreshing conclusion to the year, setting a serene backdrop for the festive season.

Average December Wind Speed in Saint Augustine South

The chart displays monthly wind speed patterns in Saint Augustine South, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.83.94.43.84.13.63.23.22.93.44.33.4 m/s
Data source: Saint Augustine South December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Saint Augustine South Compares to Other Months

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

December and January in Saint Augustine South present a shift in weather patterns. In December, temperatures range from a minimum of 4°C (39°F) to a maximum of 26°C (78°F), with an average of 17°C (63°F). The month sees about 70 mm (2.7 in) of precipitation over 8 days, alongside relatively high humidity at 84%. In contrast, January experiences slightly cooler temperatures, with a minimum of 0°C (33°F) and a maximum of 25°C (77°F), averaging around 15°C (60°F). Precipitation decreases to 47 mm (1.9 in) over just 5 days, while humidity remains similar at 83%. For more detailed insights, you can check Saint Augustine South weather in January.

When comparing the weather in December and February, we see some similarities and minor differences. Both months have similar average temperatures, with December experiencing a minimum of 4°C (39°F) and a maximum of 26°C (78°F), while February has slightly higher lows at 5°C (41°F) and the same maximum of 26°C (79°F). Precipitation levels also show a subtle difference, with December receiving 70 mm (2.7 in) over 8 days, compared to February's 61 mm (2.4 in) over 9 days. Humidity is slightly lower in February at 80%, down from 84% in December. For more detailed weather insights specific to February, you can check Saint Augustine South weather in February.

In December, the weather features a range of temperatures from a minimum of 4°C (39°F) to a maximum of 26°C (78°F), with an average of 17°C (63°F). This month tends to be quite humid, with an 84% humidity level and 70 mm (2.7 in) of precipitation over approximately 8 days. In contrast, March sees slightly warmer temperatures, with minimums at 6°C (44°F) and maximums reaching 28°C (82°F), yielding an average of 18°C (66°F). Additionally, March has lower precipitation, totaling 34 mm (1.3 in) over about 6 days, and a decrease in humidity to 75%. For more details on March conditions, you can visit Saint Augustine South weather in March.

In comparing December and April weather, December features cooler temperatures with a minimum of 4°C (39°F) and an average high of 26°C (78°F), while April enjoys warmer conditions, starting with a minimum of 11°C (52°F) and peaking at 30°C (85°F). Both months experience significant humidity, but December’s average of 84% is notably higher than April’s 70%. Interestingly, while December sees about 70 mm (2.7 in) of precipitation over 8 days, April has slightly more rainfall at 82 mm (3.2 in) but over just 7 days. For a deeper look into April weather specifics, visit Saint Augustine South weather in April.

In December, the weather is quite mild, with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 26°C (78°F) and an average of 17°C (63°F). The month experiences about 70 mm (2.7 in) of precipitation over 8 days, accompanied by high humidity levels at 84%. In contrast, May brings warmer temperatures, with a minimum of 14°C (58°F) and a maximum of 32°C (90°F), averaging around 24°C (76°F). Despite slightly higher precipitation at 77 mm (3.0 in) over the same number of days, the humidity decreases to 68%, resulting in a more comfortable atmosphere. For a detailed look at May's climate, visit Saint Augustine South weather in May.

December and June offer contrasting weather experiences. In December, temperatures range from a mild 4°C (39°F) to a comfortable 26°C (78°F), with an average of 17°C (63°F). This month sees about 70 mm (2.7 in) of rain across 8 days, resulting in a relatively humid atmosphere with 84% humidity. In contrast, June brings warmer temperatures, with lows of 22°C (72°F) and highs reaching up to 33°C (92°F), averaging around 26°C (80°F). However, June is significantly wetter, experiencing 143 mm (5.6 in) of precipitation over 22 days, coupled with a lower humidity level of 75%. For more detailed insights into the weather during June, you can check out Saint Augustine South weather in June.

December and July present stark contrasts in weather conditions. In December, temperatures range from a mild minimum of 4°C (39°F) to a comfortable maximum of 26°C (78°F), with an average of 17°C (63°F) and relatively high humidity at 84%. The month experiences approximately 70 mm (2.7 in) of precipitation over about 8 days, suggesting a gentler, albeit wetter climate. In contrast, July brings significantly warmer temperatures, with a minimum of 24°C (75°F) and a maximum reaching up to 33°C (91°F), averaging around 27°C (82°F). This summer month sees much greater rainfall, amounting to 161 mm (6.3 in) over 23 days, and humidity levels at 79%. For more specifics on July's weather patterns, you can check Saint Augustine South weather in July.

December and August present contrasting weather patterns that define the unique character of each month. In December, temperatures range from a minimum of 4°C (39°F) to a comfortable average of 17°C (63°F), peaking at 26°C (78°F). The month sees a total precipitation of 70 mm (2.7 in) over about 8 days, with humidity levels at a relatively high 84%.

In stark contrast, August experiences warmer temperatures, with a minimum of 24°C (75°F), an average of 28°C (82°F), and maximum temperatures reaching 34°C (93°F). It is also the wettest month, with precipitation totaling 146 mm (5.8 in) over 24 days, and slightly lower humidity at 81%. For a closer look at August conditions, visit Saint Augustine South weather in August.

When comparing the weather of December and September, a noticeable contrast in temperature and precipitation emerges. December offers milder conditions with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 26°C (78°F), accompanied by an average of 17°C (63°F). In contrast, September tends to be significantly warmer, featuring temperatures from a minimum of 20°C (68°F) up to 33°C (92°F), with an average of 27°C (81°F).

Additionally, September is marked by higher precipitation levels, totaling 162 mm (6.4 in) over 19 days, while December sees less rainfall, amounting to 70 mm (2.7 in) across just 8 days, contributing to a slightly higher humidity of 84% in December compared to 83% in September. For more detailed information, you can check out Saint Augustine South weather in September.

When comparing the weather in December to that in October, we can observe several notable differences. In December, temperatures range from a minimum of 4°C (39°F) to a maximum of 26°C (78°F), with an average of 17°C (63°F). In contrast, October experiences warmer temperatures, with a minimum of 11°C (51°F), an average of 25°C (77°F), and highs reaching 32°C (89°F). Additionally, precipitation levels are higher in October, totaling 123 mm (4.9 in) over 16 days, compared to December's 70 mm (2.7 in) spread across 8 days. Humidity levels remain relatively similar, with December at 84% and October slightly lower at 81%. For a closer look at October weather specifics, you can visit Saint Augustine South weather in October.

In comparing the weather of December and November, we see some notable differences. December experiences a slightly lower minimum temperature of 4°C (39°F) compared to November's 6°C (43°F), and the average temperature drops from 20°C (68°F) in November to 17°C (63°F) in December. The maximum temperature also decreases, with December peaking at 26°C (78°F) versus November's 30°C (86°F). Additionally, December has less precipitation, recording 70 mm (2.7 in) over 8 days, while November receives 91 mm (3.6 in) over 10 days. Despite these changes, both months feature high humidity levels, with December at 84% and November slightly lower at 82%. For more detailed insights into November's weather, you can visit Saint Augustine South weather in November.

Compare Saint Augustine South's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Saint Augustine South

As December unfolds in Saint Augustine South, the weather experiences a notable shift from the warmer months, creating a uniquely refreshing atmosphere. The cooler average temperatures invite residents and visitors to enjoy outdoor activities, while occasional rainfall, averaging 70 mm over about eight days, adds a touch of winter vitality to the landscape. With humidity levels hovering around 84%, the air can feel quite crisp, contrasting sharply with the sultrier summer months. This combination of cooler temperatures and heightened moisture levels sets the stage for a comfortable winter experience in this beautiful coastal region. For more details about the climate throughout the year, check out Saint Augustine South Climate.