December Weather in Kapa'a, United States

Last updated: February 24, 2025

In December, Kapa'a, Hawaii, experiences a delightful tropical climate with average temperatures hovering around 23°C (74°F). Daily highs can reach a comfortable 26°C (79°F), while nighttime dips to a cozy 19°C (66°F). December also brings significant rainfall, totaling 127 mm (5.0 in) over 21 days, contributing to the lush greenery the island is known for. With humidity levels at 79%, visitors can expect a refreshing, albeit humid, atmosphere—perfect for exploring Kapa'a’s stunning landscapes while embracing its enchanting, wet season charm.

December Temperature in Kapa'a

In Kapa'a, United States, December marks a delightful transition into the cooler months, with temperatures ranging from a comfortable 19°C (66°F) at night to a pleasant 26°C (79°F) during the day. The average temperature settles at 23°C (74°F), offering a warm reprieve from winter chill elsewhere. As the year draws to a close, the trend reveals a gradual decline in nighttime lows, yet daytime highs remain relatively stable, mirroring the patterns of previous months. This consistency not only enhances the region's appeal for outdoor activities but also invites visitors to bask in the island's beauty under the temperate sun. December's climate ultimately provides the perfect backdrop for both relaxation and adventure, making Kapa'a a sought-after destination this time of year.

December Weather in Kapa'a: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Kapa'a, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec727171737476777878777573
Data source: Temperature data for Kapa'a 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 Kapa'a

In Kapa'a, December sees a notable increase in precipitation, with average rainfall reaching 127 mm (5.0 in) over 21 days. This makes it one of the wetter months of the year, contributing to the lush, vibrant landscape that characterizes the region. Compared to the preceding months, December's rainfall is significantly higher than both November’s 76 mm and October’s 95 mm, establishing a clear trend of escalating precipitation as the year draws to a close. The consistent frequency of rainy days further emphasizes this seasonal shift, indicating that residents and visitors alike should prepare for the rich, refreshing downpours that define the Hawaiian winter.

December Precipitation Trends in Kapa'a

The chart displays monthly precipitation patterns in Kapa'a, 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.
JanFebMarAprMayJunJulAugSepOctNovDec60941568063928080659576127
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Kapa'a

In Kapa'a, United States, December brings a humidity level of 79%, slightly lower than the preceding months but still comfortably higher than many parts of the country. Throughout the year, humidity levels tend to rise gradually, peaking at 83% in July and August before beginning a slow decline towards the year's end. With levels hovering in the low 80s% from April through October, the air remains notably moist, fostering that lush, tropical feel characteristic of the region. As the year winds down, December's slight dip in humidity signals a transition, but the overall trend reflects consistent moisture, perfect for those who appreciate a vibrant, tropical atmosphere.

December Average Humidity in Kapa'a

This chart illustrates the average monthly humidity levels in Kapa'a, 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.
JanFebMarAprMayJunJulAugSepOctNovDec78%79%78%81%82%82%83%83%82%81%80%79%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Kapa'a

As December rolls into Kapa'a, the UV Index reflects a noticeable dip, settling at 7, which falls into the high exposure category with a burn time of 25 minutes. This marks a shift from the extreme levels seen in the preceding months, where indices soared to as high as 13 in July and August. The trend shows a gradual decline as the year closes, with the UV Index tapering from 11 in March and April to the more moderate figures in December. While it's essential to remain protected, the risk of sunburn begins to lessen compared to earlier months, providing a slight respite during outdoor activities. For more detailed information on UV levels throughout the year, check out Kapa'a UV Index.

Maximum UV Index Levels in Kapa'a for December

The chart shows the monthly maximum UV Index (UVI) for Kapa'a 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.
JanFebMarAprMayJunJulAugSepOctNovDec710111113121313121087
Data source: Kapa'a 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 Kapa'a

In Kapa'a, United States, December brings a delightful 256 hours of sunshine, marking a slight dip from the vibrant rays of the preceding months. As the year transitions into winter, sunshine hours steadily increase from January's 216 hours to a peak in July with 349 hours, showcasing a trend of growing daylight. Notably, the summer months shine bright, while autumn and early winter experience a gradual reduction in sunlight. December's sunshine, although less than in previous months, still embodies the island's warm charm, inviting residents and visitors alike to bask in the tropical glow before the year concludes.

Monthly Sunshine Duration in Kapa'a: December Highlighted

The December sunshine duration represents the total number of hours Kapa'a 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.
JanFebMarAprMayJunJulAugSepOctNovDec216h256h283h305h335h334h349h337h315h298h268h256h
Data source: Kapa'a December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Kapa'a During December

In Kapa'a, December marks a notable dip in sunny weather, with only a 33% chance of clear skies, making it one of the gloomiest months of the year. This decline follows a gradual increase in sunshine from the earlier months, peaking in the vibrant summer with 60% to 61% chances in June and August. As temperatures cool in the fall, the likelihood of sun begins to wane, hovering around 56% in both October and November before plummeting as winter approaches. Thus, while December invites a serene charm with its cooler temperatures, it also brings a greater likelihood of overcast days, contrasting sharply with the sun-drenched summer months.

Percentage of Sunny Days in December in Kapa'a

The chart illustrates the percentage of sunny days in Kapa'a 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 Kapa'a experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec52%52%43%50%56%60%46%61%54%56%56%33%
Data source: Kapa'a December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Kapa'a in December

In December, Kapa'a experiences a return to 10 hours of daylight, mirroring the shorter days of January. This gradual decrease in sunlight begins in November, after the peak brightness of 13 hours a day during the summer months from May to July. As the year transitions towards winter, daylight slowly diminishes, hinting at the island's cool and cozy holiday season. Yet, even with these shorter days, the vibrant atmosphere of Kapa'a remains undeterred, offering a unique charm as residents and visitors alike bask in the warm glow of the sunset that marks the end of their day.

Average Daylight Hours in Kapa'a for December

The chart illustrates the variation in daylight duration in Kapa'a throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec10h 56m11h 25m12h 2m12h 40m13h 11m13h 26m13h 18m12h 50m12h 13m11h 36m11h 3m10h 48m
Data source: Kapa'a daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Kapa'a

As December settles over Kapa'a, the island experiences a refreshing uptick in wind speed, averaging 6.1 m/s (14 mph), which mirrors the breezy July and March months. This seasonal shift brings a lively energy to the coastal landscape, contrasting with the relatively calm November winds of 3.9 m/s (9 mph). Throughout the year, Kapa'a showcases a dynamic wind pattern, peaking notably in the warmer months of March and July, while the winter months generally maintain a steadier breeze. The December winds not only invigorate the picturesque surroundings but also highlight the area's unique climatic rhythms, perfect for outdoor enthusiasts and those seeking solace in nature's embrace.

Average December Wind Speed in Kapa'a

The chart displays monthly wind speed patterns in Kapa'a, 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.
JanFebMarAprMayJunJulAugSepOctNovDec5.55.16.14.84.84.66.05.35.55.53.96.1 m/s
Data source: Kapa'a December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Kapa'a Compares to Other Months

The weather in Kapa'a 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 Kapa'a and find detailed weather information for every month.

In December, temperatures in Kapa'a range from a minimum of 19°C (66°F) to a maximum of 26°C (79°F), with an average temperature of 23°C (74°F). The month is characterized by higher precipitation, averaging 127 mm (5.0 in) over 21 days, contributing to a relatively humid atmosphere with humidity levels around 79%. Conversely, January sees slightly cooler temperatures, with an average of 22°C (73°F) and maximums reaching 25°C (78°F), while the minimum remains consistent at 19°C (67°F). January experiences significantly less rainfall, with only 60 mm (2.3 in) over 11 days, resulting in a slightly lower humidity of 78%. For a more detailed look at January's weather, you can visit Kapa'a weather in January.

December and February weather in Kapa'a exhibit some similarities as well as notable differences. In December, temperatures range from a minimum of 19°C (66°F) to a maximum of 26°C (79°F), with an average of 23°C (74°F) and higher precipitation at 127 mm (5.0 in) over 21 days. In contrast, February sees slightly cooler temperatures with a minimum of 16°C (62°F) and an average of 22°C (71°F), while the maximum remains the same at 26°C (78°F). Precipitation in February drops to 94 mm (3.7 in) over 17 days, indicating a drier month overall. Both months maintain a consistent humidity level of 79%. For more details, you can check Kapa'a weather in February.

In comparing the weather between December and March, we see some subtle differences. December offers slightly higher average temperatures, with a minimum of 19°C (66°F) and a maximum of 26°C (79°F), while March has a minimum of 18°C (65°F) and a maximum of 25°C (78°F). Both months experience a similar number of rainy days, around 21, but March receives a bit more precipitation at 156 mm (6.1 in) compared to December's 127 mm (5.0 in). Humidity remains consistent, with December at 79% and March at 78%. For a closer look at March conditions, you can check out Kapa'a weather in March.

In December, temperatures tend to be slightly varied, with a minimum of 19°C (66°F) and a maximum of 26°C (79°F), resulting in an average temperature of 23°C (74°F). This month experiences higher precipitation levels, totaling 127 mm (5.0 in) over 21 days, alongside a humidity level of 79%. In contrast, April exhibits similar temperature patterns, with the same minimum and maximum temperatures, but slightly lower average temperatures at 23°C (73°F). Rainfall in April is reduced, totaling 80 mm (3.2 in) over 20 days, and humidity is marginally higher at 81%. For a detailed look into April weather specifics, visit Kapa'a weather in April.

In December, Kapa'a experiences mild temperatures with a minimum of 19°C (66°F) and a maximum of 26°C (79°F), averaging around 23°C (74°F). The month is characterized by higher rainfall, totaling 127 mm (5.0 in) over 21 days, contributing to a humidity level of 79%. In contrast, May sees slightly warmer maximum temperatures, reaching up to 27°C (81°F), while maintaining the same minimum and average temperatures as December. However, precipitation significantly drops to 63 mm (2.5 in), also spread over 21 days, leading to a slightly higher humidity level of 82%. For a more detailed look at the weather during this month, check out Kapa'a weather in May.

In December, the weather is characterized by slightly cooler temperatures, with minimums around 19°C (66°F) and maximums reaching 26°C (79°F). The month sees a considerable amount of rainfall, totaling 127 mm (5.0 in) over 21 days, accompanied by high humidity levels averaging 79%. In contrast, June experiences warmer conditions, with minimum temperatures at 21°C (71°F) and maximums peaking at 27°C (81°F). Rainfall is less frequent in June, totaling 92 mm (3.6 in) over 20 days, and humidity is marginally higher at 82%. For more detailed information on June weather, you can visit Kapa'a weather in June.

When comparing the weather in December and July, December tends to be slightly cooler, with average temperatures ranging from a minimum of 19°C (66°F) to a maximum of 26°C (79°F). In contrast, July boasts warmer temperatures, with averages starting at a minimum of 22°C (73°F) and peaking at 28°C (82°F). Additionally, December experiences higher precipitation, averaging 127 mm (5.0 in) over 21 days, while July sees less rainfall at 80 mm (3.2 in) over 26 days. Both months have high humidity levels, with December at 79% and July slightly higher at 83%. For more details on July weather specifically, visit Kapa'a weather in July.

In comparing the weather of December and August, December tends to be slightly cooler, with average temperatures ranging from a minimum of 19°C (66°F) to a maximum of 26°C (79°F), while August boasts warmer conditions, with a minimum of 22°C (73°F) and a maximum of 28°C (83°F). Precipitation is more pronounced in December, with about 127 mm (5.0 in) over 21 days, compared to August's 80 mm (3.2 in) across 23 days. Additionally, humidity levels are relatively high in both months, with December at 79% and August at 83%, making the air feel quite muggy throughout the year. For a closer look at specific August weather conditions, check out Kapa'a weather in August.

In December, the weather tends to be cooler compared to September, with average temperatures ranging from a minimum of 19°C (66°F) to a maximum of 26°C (79°F). In contrast, September boasts higher temperatures, with a minimum of 23°C (73°F) and a maximum of 28°C (83°F). Additionally, December experiences significantly more precipitation, totaling 127 mm (5.0 in) over 21 days, while September has a much lighter rainfall of 65 mm (2.5 in) over the same number of days. Despite December's cooler temperatures, the humidity is slightly lower at 79% compared to September's 82%. For more details on September weather, you can check Kapa'a weather in September.

In December, the weather is slightly cooler compared to October, with average temperatures ranging from a minimum of 19°C (66°F) to a maximum of 26°C (79°F). In contrast, October enjoys warmer temperatures, with a minimum of 22°C (71°F) and a maximum of 28°C (82°F). Furthermore, December experiences higher precipitation levels, totaling 127 mm (5.0 in) over 21 days, compared to October's 95 mm (3.7 in) over 22 days. Humidity levels remain relatively similar, with December at 79% and October at 81%. For a detailed look at weather patterns, check out Kapa'a weather in October.

When comparing the weather in December to November, December tends to be slightly cooler, with minimum temperatures averaging at 19°C (66°F) compared to November's minimum of 21°C (69°F). The average temperature remains similar, with December averaging 23°C (74°F) and November at 24°C (76°F). Precipitation increases notably in December, reaching 127 mm (5.0 in) over 21 days, which is significantly higher than November's 76 mm (3.0 in) during the same number of days. Additionally, humidity levels are slightly lower in December at 79%, whereas November maintains a higher humdity at 80%. For more details, you can check Kapa'a weather in November.

Compare Kapa'a's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Kapa'a

As December rolls into Kapa'a, residents and visitors alike can expect a distinct shift in weather compared to other months. The air becomes crisper and more humid, with a tendency for increased rainfall that can make the landscape bloom vibrantly. While temperatures remain relatively mild, the frequent showers contribute to a lush environment, making it an enchanting time to explore the island's natural beauty. If you're planning your visit, don't forget to check out the comprehensive weather insights available at Kapa'a Climate for a deeper understanding of what to expect during this unique month.