December Weather in Treasure Island, United States

Last updated: February 24, 2025

In December, Treasure Island, United States, presents a mild coastal climate characterized by an average temperature of 19°C (66°F). The month experiences a comfortable range, with maximum temperatures reaching up to 25°C (77°F) and dropping to a cool 7°C (45°F) at night. While the region enjoys a pleasant atmosphere, it is important to note that precipitation amounts to 66 mm (2.6 in) over approximately six rainy days, contributing to the overall humidity of 84%. This blend of warmth and occasional rainfall creates an inviting yet refreshing backdrop for winter activities on the island.

December Temperature in Treasure Island

As December arrives in Treasure Island, United States, temperatures reflect the transition toward cooler winter days. With minimums creeping down to 7°C (45°F) and averages settling at a comfortable 19°C (66°F), the month offers a mild reprieve from the summer heat. While maximum temperatures reach a pleasant 25°C (77°F), this cooler season contrasts sharply with the sweltering highs of mid-year, where temperatures frequently hover around the low 30s (high 80s to low 90s Fahrenheit). The steady decline in temperature from the fall months indicates a shift, making December an inviting time for outdoor activities without the harshness of colder climates. As the year draws to a close, residents and visitors alike can embrace the crisp, comfortable air that December brings to this coastal paradise.

December Weather in Treasure Island: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Treasure Island, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec626568737781828281787065
Data source: Temperature data for Treasure Island generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Treasure Island

In Treasure Island, December marks a notable transition in rainfall patterns as the year draws to a close, with an average precipitation of 66 mm (2.6 in) spread over six days. This amount is slightly above November's 46 mm, indicating a mild uptick in moisture as the winter months set in. Interestingly, December's precipitation serves as a prelude to the wetter months that follow, particularly June and July, which display the peak rainfall. Overall, while December experiences relatively modest rainfall, it subtly reflects the seasonal shift towards a wetter climate that characterizes much of the region's weather dynamics.

December Precipitation Trends in Treasure Island

The chart displays monthly precipitation patterns in Treasure Island, 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.
JanFebMarAprMayJunJulAugSepOctNovDec40502060105174204219143674666
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Treasure Island

In December, Treasure Island experiences a notable increase in humidity, reaching 84%, which is the highest level of the year. This rise is part of a trend observed throughout the months, where humidity starts high at 82% in January and February, gradually decreasing to its lowest point of 74% during the summer months of July and August. However, as the year progresses into the fall, humidity levels rebound, peaking again in December. The variation in humidity not only highlights the seasonal shifts but also suggests a more tropical atmosphere as the climate transitions towards the end of the year. Thus, December showcases a distinct return to a more moisture-laden environment, wrapping up the year with a touch of humidity reminiscent of the preceding winter months.

December Average Humidity in Treasure Island

This chart illustrates the average monthly humidity levels in Treasure Island, 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.
JanFebMarAprMayJunJulAugSepOctNovDec82%82%79%78%76%75%74%75%78%80%82%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Treasure Island

In December, Treasure Island experiences a notable dip in the UV Index, rated at 5, which falls into the moderate exposure category. This reduction in sun intensity translates to a more forgiving burn time of 30 minutes, offering a welcome reprieve after the extreme levels seen in the summer months. As the year progresses from January's high index of 6 to February's very high 8, and ultimately reaching a peak of 12 during the summer, December showcases a trend towards lower UV levels, making it a great time for outdoor activities with less risk of sunburn. For those planning outings, it's always a good idea to check the latest updates at Treasure Island UV Index to ensure safe sun exposure.

Maximum UV Index Levels in Treasure Island for December

The chart shows the monthly maximum UV Index (UVI) for Treasure Island 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.
JanFebMarAprMayJunJulAugSepOctNovDec6810111112121111975
Data source: Treasure Island 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 Treasure Island

In December, Treasure Island enjoys 269 hours of sunshine, rounding off a year filled with bright days. Although this month sees a decline compared to the exuberance of earlier months like May, which boasts 335 hours, it still shines brightly against the chill of winter. The month-to-month pattern reveals a gradual decrease in sunlight as the year progresses from the sun-drenched days of late spring to the cooler, shorter days of winter, yet December maintains a respectable glow as it leads into the new year. With each season bringing its own charm, December's radiant skies remind us that even in winter, Treasure Island remains a sunlit gem, inviting visitors to bask in its warm embrace.

Monthly Sunshine Duration in Treasure Island: December Highlighted

The December sunshine duration represents the total number of hours Treasure Island 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.
JanFebMarAprMayJunJulAugSepOctNovDec216h265h321h319h335h303h319h316h311h300h279h269h
Data source: Treasure Island December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Treasure Island During December

In Treasure Island, United States, the likelihood of sunny weather in December shows a promising 57% chance, making it a favorable time for sun-seekers. As the year progresses, there’s a noticeable trend of increasing sunny days from the chilly depths of January at 38% to the more welcoming November and December, where sunshine becomes a bit more abundant. While summer months like June and August see a sharp decline in sun, the transition into the cooler months marks a rebound in sunshine probabilities. This pattern highlights December as a bright spot in an otherwise cloudy winter season, ideal for enjoying the outdoors before the year winds down.

Percentage of Sunny Days in December in Treasure Island

The chart illustrates the percentage of sunny days in Treasure Island 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 Treasure Island experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec38%51%54%63%59%18%23%17%33%51%55%57%
Data source: Treasure Island December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Treasure Island in December

As December rolls in, Treasure Island, United States, experiences a return to shorter days, with daylight lasting just 10 hours. This trend echoes the patterns seen at the year's beginning and end, where daylight dips to its lowest in December, following a gradual tapering from the summer months. Notably, from May through August, the sun generously offers up to 13 hours of light, basking the island in warmth and brightness. As autumn approaches, daylight decreases gradually, signaling the transition into winter's embrace. Overall, the daylight duration in Treasure Island paints a vivid picture of the seasons shifting, with December marking a time of reflection as daylight gives way to longer nights.

Average Daylight Hours in Treasure Island for December

The chart illustrates the variation in daylight duration in Treasure Island throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 35m11h 12m12h12h 50m13h 31m13h 51m13h 40m13h 4m12h 16m11h 27m10h 45m10h 23m
Data source: Treasure Island daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Treasure Island

As the year draws to a close, December in Treasure Island brings a notable shift in wind patterns, with an average speed of just 3.6 m/s (8 mph), marking it as one of the calmest months. This decline in wind velocity from the earlier months—especially when compared to the crisp, breezy conditions of January and February, which averaged around 4.9 m/s to 5.3 m/s—suggests a gentle transition into the winter season. In fact, December's softness mirrors the overall trend of decreasing wind speeds as the year progresses, with noticeable calming after the more robust breezes of late fall. This serene atmosphere invites residents and visitors alike to relish in the peaceful, breezy delights of the coastal community, offering a perfect backdrop for leisurely pursuits along the shore.

Average December Wind Speed in Treasure Island

The chart displays monthly wind speed patterns in Treasure Island, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.95.34.95.05.04.13.84.23.44.65.03.6 m/s
Data source: Treasure Island December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Treasure Island Compares to Other Months

The weather in Treasure Island 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 Treasure Island and find detailed weather information for every month.

December typically brings warmer temperatures compared to January, with average highs reaching 25°C (77°F) and lows around 7°C (45°F), while January sees slightly cooler averages with a maximum of 24°C (75°F) and a minimum of 3°C (37°F). Precipitation decreases from 66 mm (2.6 in) over 6 days in December to 40 mm (1.6 in) over 4 days in January, contributing to a relatively drier start to the year. The humidity remains fairly consistent, with December at 84% and January slightly lower at 82%. For more details, you can check Treasure Island weather in January.

December and February share similar average temperatures, hovering around 19°C (66°F), but February experiences slightly warmer minimum temperatures, starting at 9°C (48°F) compared to December's 7°C (45°F). Both months have a maximum temperature limit of 25°C (77°F to 78°F). However, February sees less rainfall, with 50 mm (2.0 in) over 5 days, whereas December has 66 mm (2.6 in) spread across 6 days. The humidity levels are also slightly lower in February at 82%, compared to December's 84%. For more details on weather specifics in February, check out Treasure Island weather in February.

In December, the weather features a pleasant range with minimum temperatures around 7°C (45°F), an average of 19°C (66°F), and highs reaching 25°C (77°F). The month experiences around 66 mm (2.6 inches) of precipitation over about six days, creating a relatively humid atmosphere at 84%. In contrast, March sees slightly warmer conditions, with minimum temperatures of 8°C (46°F), an average of 20°C (68°F), and maximums hitting 26°C (80°F). The total precipitation drops significantly to 20 mm (0.8 inches) over just three days, contributing to a slightly lower humidity level at 79%. For a more detailed overview of the weather in March, you can visit Treasure Island weather in March.

December and April showcase varying climate conditions in Treasure Island. December features milder temperatures, with a minimum of 7°C (45°F) and an average of 19°C (66°F), while April enjoys warmer temperatures, starting at a minimum of 12°C (54°F) and averaging 23°C (73°F). Precipitation levels are fairly comparable, with December receiving 66 mm (2.6 in) over 6 days, and April seeing slightly less with 60 mm (2.4 in) across 7 days. In terms of humidity, December is more humid at 84%, whereas April has a relatively lower humidity level of 78%. For more detailed information on weather patterns in April, visit Treasure Island weather in April.

In December, the weather is relatively mild with average temperatures ranging from a cool 7°C (45°F) at night to a comfortable 25°C (77°F) during the day. The month experiences about 66 mm (2.6 inches) of precipitation over six days, contributing to a high humidity level of 84%. In contrast, May brings warmer conditions, with temperatures ranging from a minimum of 18°C (64°F) to a maximum of 30°C (87°F) and an average of 25°C (77°F). This month sees increased rainfall, totaling 105 mm (4.1 inches) over ten days, while humidity drops slightly to 76%. For a closer look at May weather specifics, you can check out Treasure Island weather in May.

December's weather offers milder temperatures ranging from a minimum of 7°C (45°F) to a maximum of 25°C (77°F), with an average of 19°C (66°F). It experiences relatively low humidity at 84% and light precipitation occurring on just 6 days, totaling 66 mm (2.6 in). In contrast, June brings significantly warmer temperatures, with nightly lows at 23°C (74°F) and daytime highs reaching up to 32°C (89°F), averaging around 27°C (81°F). However, it is also much wetter, with 174 mm (6.8 in) of rain over 19 days and a more comfortable humidity level of 75%. For a closer look at June specifics, check out Treasure Island weather in June.

When comparing the weather in December and July, there is a significant contrast in temperatures and precipitation levels. December features milder temperatures, with a minimum of 7°C (45°F) and an average of 19°C (66°F), while July boasts much warmer weather, ranging from a minimum of 25°C (77°F) to an average of 28°C (82°F), reaching a maximum of 32°C (90°F). In terms of precipitation, December receives 66 mm (2.6 in) over just 6 days, whereas July is much wetter, with 204 mm (8.0 in) spread over 25 days. This results in higher humidity levels in December at 84%, compared to 74% in the more humid July. For a more detailed look, you can explore Treasure Island weather in July.

In December, the weather is notably cooler, with average temperatures ranging from a minimum of 7°C (45°F) to a maximum of 25°C (77°F), and an average of 19°C (66°F). The month experiences 66 mm (2.6 in) of precipitation over about 6 days, contributing to a higher humidity level at 84%. In contrast, August presents a significantly warmer climate, with temperatures typically ranging from a minimum of 25°C (77°F) to a maximum of 32°C (90°F), averaging around 28°C (83°F). This month sees much more rainfall, with 219 mm (8.6 in) over approximately 25 days, though humidity is slightly lower at 74%. For more insights on the summer conditions, check out Treasure Island weather in August.

December and September present contrasting weather patterns. In December, temperatures range from a minimum of 7°C (45°F) to a maximum of 25°C (77°F), with an average of 19°C (66°F). The month experiences approximately 66 mm (2.6 in) of precipitation over six days, accompanied by a high humidity level of 84%. In contrast, September boasts much warmer conditions, with temperatures varying from a minimum of 23°C (74°F) to a maximum of 32°C (89°F), averaging around 27°C (82°F). This month sees significantly more rainfall, totaling 143 mm (5.6 in) across 18 days, while maintaining a slightly lower humidity of 78%. For more specifics on September weather, you can check out Treasure Island weather in September.

December weather is generally cooler than in October, with temperatures ranging from a low of 7°C (45°F) to a high of 25°C (77°F) compared to October's milder range of 15°C (59°F) to 31°C (87°F). Both months experience similar levels of precipitation, with December receiving 66 mm (2.6 in) over 6 days, while October sees 67 mm (2.6 in) spread across 10 days. Additionally, December tends to have higher humidity at 84%, compared to October's 79%. For more detailed insights, you can explore Treasure Island weather in October.

In December, the weather noticeably cools down compared to November, with minimum temperatures dropping from 12°C (54°F) in November to 7°C (45°F) in December. The average temperature also sees a slight decrease, from 21°C (70°F) in November to 19°C (66°F). Although both months experience rain on six days, December has higher precipitation levels at 66 mm (2.6 in) compared to November's 46 mm (1.8 in). Additionally, humidity levels remain relatively high, with December at 84% and November slightly lower at 82%. For a detailed look at November weather in Treasure Island, you can visit Treasure Island weather in November.

Compare Treasure Island's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Treasure Island

As December rolls in, Treasure Island transforms into a cooler escape compared to the warmer months, with average temperatures hovering around 19°C (66°F) and peaks hitting a pleasant 25°C (77°F). This month experiences a delightful balance of sunshine and rain, featuring about 6 days of precipitation, bringing a refreshing break from the usual humidity, which is still relatively high at 84%. The combination of mild temperatures and occasional showers creates a unique atmosphere that distinguishes December from the hotter summer months. For a deeper dive into what to expect throughout the year, explore the Treasure Island Climate page.