December Weather in La Union, Chile

Last updated: August 21, 2025

Experience the delightful December weather of La Union, Chile, where temperatures range from a refreshing 3°C (38°F) to a balmy maximum of 30°C (86°F). With an average temperature of 15°C (59°F), this month offers a comfortable climate perfect for outdoor activities. Although there are 6 days of precipitation totaling 52 mm (2.0 in), the rich 82% humidity adds a vibrant touch to the lush landscapes. Whether you're exploring the area's natural beauty or enjoying local attractions, December in La Union promises a memorable experience amid its varied weather.

December Temperature in La Union

In La Union, Chile, December marks a delightful transition into the summer season, with temperatures reflecting a significant warming trend. The month sees minimums around 3°C (38°F), allowing for cool evenings, while the average temperature hovers at a comfortable 15°C (59°F), perfect for outdoor activities. As the days progress, temperatures can soar to a maximum of 30°C (86°F), inviting locals and visitors alike to enjoy the vibrant landscape and sun-soaked experiences. Compared to the cooler months preceding December, this month not only showcases a rise in daytime warmth but also sets the stage for the seasonal vibrancy that characterizes Chilean summer.

December Weather in La Union: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in La Union, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In La Union, December typically has an average temperature of {2}°C ({3}°F), with highs reaching up to {4}°C ({5}°F) and lows dropping to around {6}°C ({7}°F).
JanFebMarAprMayJunJulAugSepOctNovDec606257524845444547505558
Data source: Temperature data for La Union 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 La Union

In December, La Union, Chile, experiences a noticeable shift in its precipitation patterns as it transitions into the summer months. The region receives approximately 52 mm (2.0 in) of rain over 6 days, marking a decrease from the wetter months preceding it. This decline in rainfall is consistent with the trend observed from May to November, where precipitation peaked significantly in May and June before tapering off. Despite still enjoying the occasional shower, December's drier conditions signal a shift towards warmer, sunnier days as the year draws to a close, leading the local landscape to flourish with vibrant colors while preparing for the dry season ahead.

December Precipitation Trends in La Union

The chart displays monthly precipitation patterns in La Union, 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. In La Union, December typically receives around {2} mm ({3} inches) of precipitation spread over approximately {4} days.
JanFebMarAprMayJunJulAugSepOctNovDec272975981572561992261181157352
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in La Union

In La Union, Chile, December marks a continuation of the region's high humidity, averaging around 82% this month. This figure reflects a gradual decrease from the peak levels seen in July and August, which hovered at 87%, creating a notably damp atmosphere. Humidity levels tend to be highest during the mid-year months, peaking in June and July, before tapering off slightly as the year nears its end. Interestingly, December's humidity is reminiscent of trends observed in January and November, underscoring a seasonal pattern where the air retains a rich moisture content, providing a lush environment as summer approaches. Overall, December’s humidity sits comfortably in line with La Union's characteristic climate, contributing to the region's vibrant natural beauty.

December Average Humidity in La Union

This chart illustrates the average monthly humidity levels in La Union, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in La Union is approximately {2}%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%80%79%84%86%86%87%87%85%83%80%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in La Union

In December, La Union, Chile experiences an extreme UV Index of 13, with a burn time of just 10 minutes. This marks a continuation of the high UV levels seen in November, which also recorded a UV Index of 12. The trend through the year shows a significant fluctuation in UV exposure, peaking dramatically in the summer months, particularly in January and February, where indices soar to 14 and 12, respectively. As we transition into early autumn, the UV Index begins to decrease, indicating lower sun exposure and longer burn times by April. However, residents and visitors should remain cautious in December, as the intensity of UV radiation remains dangerously high. For more detailed information, visit the La Union UV Index.

Maximum UV Index Levels in La Union for December

The chart shows the monthly maximum UV Index (UVI) for La Union 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. In December, the maximum UV index in La Union typically reaches {2}, which falls under the {3} exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1412964235791213
Data source: La Union 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 La Union

As the year draws to a close, December in La Union, Chile, shines brightly with an impressive 353 hours of sunshine, making it the sunniest month of the year. This peak in sunlight follows a gradual upward trend, with hours increasing significantly from the cooler, cloudier months of June and July, which see only 137 and 160 hours respectively. By November, the days brighten substantially, revealing 304 hours of sunshine, a clear precursor to December's radiant finale. This seasonal progression not only reflects the joys of summer approaching but also creates a vibrant atmosphere, inviting both locals and visitors to bask in the warmth and beauty of La Union’s sun-drenched landscapes.

Monthly Sunshine Duration in La Union: December Highlighted

The December sunshine duration represents the total number of hours La Union 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.
JanFebMarAprMayJunJulAugSepOctNovDec291h310h307h225h185h137h160h180h241h281h304h353h
Data source: La Union December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in La Union During December

In La Union, Chile, December boasts a 65% chance of sunny weather, marking a slight uptick as the summer months approach. This increase in sunlight follows a notable decline from the vibrant summer highs of January and February, which enjoy probabilities of 63% and 76% respectively. As the year progresses into the cooler months, the likelihood of sunshine dips significantly in April through July, often falling below 30%. However, the trend reverses as December arrives, setting a promising stage for outdoor activities and holiday celebrations amid the summer's warmth. This resurgence in sunny days signals a delightful transition, making December an excellent time to bask in La Union's natural beauty.

Percentage of Sunny Days in December in La Union

The chart illustrates the percentage of sunny days in La Union 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 La Union experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec64%76%60%25%29%34%27%28%39%40%45%65%
Data source: La Union December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in La Union in December

In La Union, Chile, the rhythm of daylight unfolds dramatically throughout the year, culminating in December, when the sun graces the region with 14 hours of light. This abundance of daylight bookends the year, mirroring the long days of January and November. As the seasons transition, daylight gradually diminishes from March's 12 hours to the depths of winter in May through July, where the sun barely stretches to 9 hours. However, as spring emerges, there's a noticeable rebound in light, leading to longer days by August and September. This cyclical pattern not only enhances the vibrant lifestyle of La Union but also highlights the region's unique climatic shifts, inviting both locals and travelers to revel in the grandeur of its extended summer days.

Average Daylight Hours in La Union for December

The chart illustrates the variation in daylight duration in La Union throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec14h 38m13h 35m12h 16m10h 57m9h 51m9h 19m9h 37m10h 35m11h 51m13h 10m14h 21m14h 58m
Data source: La Union daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in La Union

In La Union, Chile, December ushers in a refreshing shift in wind patterns, with average wind speeds climbing to 3.4 m/s (8 mph). This notable increase marks a transition from the milder breezes of earlier months, reflecting a trend of varying wind intensity throughout the year. Notably, December's winds are among the strongest since August, suggesting a lively atmosphere as summer approaches. As the year winds down, La Union's coastal charm is heightened by these invigorating gusts, inviting both locals and visitors to embrace the vibrant energy and natural beauty that define this stunning region.

Average December Wind Speed in La Union

The chart displays monthly wind speed patterns in La Union, 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.
JanFebMarAprMayJunJulAugSepOctNovDec3.53.12.92.42.82.92.43.32.52.82.93.4 m/s
Data source: La Union December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in La Union Compares to Other Months

Weather in La Union varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in La Union, focusing on differences in temperature, rainfall, humidity, and UV levels.

December and January weather in La Union showcase mild temperatures with slight variations. December experiences a minimum temperature of 3°C (38°F) and averages around 15°C (59°F), reaching a maximum of 30°C (86°F), while January sees a minimal drop with temperatures ranging from 2°C (35°F) to a high of 32°C (89°F) and an average of 16°C (60°F). Precipitation is slightly higher in December at 52 mm (2.0 in) over 6 days, compared to January’s 27 mm (1.1 in) over just 5 days, making January generally drier. Humidity remains relatively stable, with December at 82% and January slightly lower at 81%. For more specific details about January weather, you can visit La Union weather in January.

When comparing the weather in December and February, several key differences emerge. December experiences a wider temperature range, with daytime highs reaching up to 30°C (86°F) and a humid atmosphere, averaging around 82%. In contrast, February tends to be warmer overall, with maximum temperatures peaking at 37°C (98°F) and a slightly lower humidity of 80%. Precipitation also differs, as December sees more rainfall at 52 mm over 6 days, while February has just 29 mm, spread across 4 days. For more detailed insights, you can check La Union weather in February.

In December, the weather features a minimum temperature of 3°C (38°F) and an average of 15°C (59°F), reaching a maximum of 30°C (86°F) on warmer days. The month sees approximately 52 mm (2.0 in) of precipitation over about 6 rainy days and maintains a relatively high humidity level of 82%.

In contrast, March experiences slightly cooler weather with a minimum of 2°C (36°F) and an average of 14°C (57°F), while still reaching a maximum of 30°C (85°F). This month has a higher precipitation level, totaling 75 mm (2.9 in) over 7 days, alongside a humidity of 79%.

For a more detailed look at March conditions, you can visit La Union weather in March.

In December, the weather showcases a milder range of temperatures with a minimum of 3°C (38°F), averaging around 15°C (59°F), and reaching a maximum of 30°C (86°F). The month experiences relatively lower precipitation levels, totaling 52 mm (2.0 in) over approximately six days, with humidity hovering at 82%. In contrast, April brings a chillier atmosphere, marked by minimum temperatures dropping to -1°C (31°F) and an average of 11°C (53°F). Although the maximum temperature in April is warmer at 25°C (77°F), it has a significantly higher precipitation level of 98 mm (3.9 in) over 12 days and slightly elevated humidity at 84%. For more detailed insights into the weather patterns in April, you can refer to La Union weather in April.

In December, the weather is relatively warm, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 30°C (86°F), and an average of 15°C (59°F). However, it also experiences moderate precipitation of 52 mm (2.0 in) over just 6 days, with humidity levels around 82%. In contrast, May brings cooler conditions, with temperatures dipping to a minimum of -3°C (27°F) and peaking at 21°C (70°F), resulting in an average of 9°C (48°F). This month is significantly wetter, featuring 157 mm (6.2 in) of rainfall spread over 17 days, and humidity slightly higher at 86%. For more details on the weather in May, you can check La Union weather in May.

In December, the weather is generally warmer with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 30°C (86°F), and an average of 15°C (59°F). This month experiences lower precipitation levels at 52 mm (2.0 in) over about 6 days, with humidity around 82%. In contrast, June presents much cooler temperatures, with a minimum of -4°C (25°F) and a maximum of only 15°C (60°F), averaging 7°C (45°F). June is notably wetter, receiving 256 mm (10.1 in) of rainfall over 20 days and maintaining a slightly higher humidity level at 86%. For a detailed look at June weather, you can check out La Union weather in June.

When comparing the weather in December and July, it's clear that the two months present quite different conditions. December tends to be milder, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 30°C (86°F) and an average of 15°C (59°F). This month sees a moderate amount of precipitation at 52 mm (2.0 in) over just 6 days, along with a relative humidity of 82%.

In contrast, July experiences much colder temperatures, with a minimum of -4°C (25°F) and a maximum of 15°C (60°F), averaging only 6°C (44°F). Rainfall is significantly higher during this month, totaling 199 mm (7.8 in) over 17 days, coupled with even higher humidity levels at 87%. For a more detailed view of July weather, you can check out La Union weather in July.

Comparing the weather of December and August reveals notable differences. December typically enjoys a warmer climate, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 30°C (86°F) and an average of 15°C (59°F). In contrast, August experiences cooler conditions, with temperatures dipping to a low of -5°C (23°F) and peaking at 17°C (62°F), averaging around 7°C (45°F). Additionally, while December sees relatively low precipitation at 52 mm (2.0 in) over about 6 rainy days, August is much wetter, receiving 226 mm (8.9 in) across 18 days, contributing to a higher humidity level of 87% compared to December's 82%. For more details on August weather, you can check La Union weather in August.

In comparing the weather between December and September, a distinct shift in temperature and precipitation is evident. December generally boasts warmer temperatures, with a minimum of 3°C (38°F) and an average of 15°C (59°F), peaking at a maximum of 30°C (86°F). In contrast, September is notably cooler, with temperatures ranging from a minimum of -2°C (29°F) to an average of 8°C (47°F) and a high of 21°C (71°F). When it comes to precipitation, December experiences less rainfall at 52 mm (2.0 in) over 6 days, while September sees significantly more rain, totaling 118 mm (4.6 in) over 13 days. Humidity levels are fairly similar, with December at 82% and September slightly higher at 85%. For a detailed look at September weather, you can visit La Union weather in September.

When comparing the weather between October and December, December tends to be warmer, with temperatures ranging from a minimum of 3°C (38°F) to a maximum of 30°C (86°F), while October experiences cooler conditions with a minimum of -1°C (30°F) and a maximum of 24°C (75°F). Precipitation is significantly lower in December at 52 mm (2.0 in) over 6 days, compared to October's 115 mm (4.5 in) across 15 days. Humidity levels are relatively similar, with December at 82% and October at 83%. For more details about October weather, you can visit La Union weather in October.

In comparing the weather between December and November, December tends to be warmer, with average temperatures ranging from a minimum of 3°C (38°F) to a maximum of 30°C (86°F), while November features cooler averages with a minimum of 1°C (35°F) and a maximum of 25°C (77°F). Additionally, December has slightly lower precipitation, totaling 52 mm (2.0 in) over 6 days, compared to November's 73 mm (2.9 in) across 9 days. Humidity levels are comparable, with December at 82% and November slightly lower at 80%. For a more detailed look, you can refer to La Union weather in November.

Compare La Union's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in La Union

In December, La Union experiences a delightful transition as it bids farewell to the coolness of winter. The temperatures rise, bringing an average of 15°C with highs reaching up to 30°C, making outdoor adventures inviting. Unlike the chillier months preceding it, December sees a noticeable decrease in cold nights, although the mornings may still start off brisk at around 3°C. While the humidity remains relatively high at 82%, the 52 mm of precipitation over just 6 days indicates a shift towards a drier climate, allowing for more sunny days and opportunities to explore the beautiful landscapes. This combination of warmth and moderate moisture makes December a unique time in La Union, distinct from the rest of the year. For more in-depth insights about the local climate, check out La Union Climate.