December Weather in La Union, Mexico

Last updated: April 22, 2025

In December, La Union, Mexico experiences a pleasant transition into winter, characterized by maximum temperatures reaching 30°C (86°F) and an average of 18°C (64°F). The nights can be cooler, with minimum temperatures dropping to 4°C (39°F). While the month sees 81 mm (3.2 in) of precipitation over approximately 11 rainy days, the high humidity at 91% adds a distinct tropical touch, enhancing the lush landscapes. This unique blend of warmth and moisture makes December a captivating time to explore the natural beauty and vibrant culture of La Union.

December Temperature in La Union

In La Union, Mexico, December brings a refreshing shift as temperatures begin to cool down, with minimums dipping to 4°C (39°F) and daytime highs averaging around 30°C (86°F). Throughout the month, the average temperature settles at a comfortable 18°C (64°F), offering a pleasant escape from the summer heat. Notably, the transition from November showcases a gradual decline in nighttime temperatures, making December a perfect time to enjoy outdoor activities without the oppressive summer warmth. As the year wraps up, visitors can relish in the mild climate that characterizes this charming town, inviting exploration and relaxation alike.

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.
JanFebMarAprMayJunJulAugSepOctNovDec636569737777767776736864
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 experiences a notable decrease in precipitation, with only 81 mm (3.2 in) of rain falling over 11 days. This decline marks the end of the heavier rainfall pattern that characterizes the earlier months, such as August, which sees an impressive 297 mm (11.7 in) over 27 days. As the year closes, the transition to the drier season is evident, with December's rainfall significantly lower compared to the peak months of September and October, both recording over 300 mm. This trend highlights a marked shift, signaling the region's move towards a relatively calmer and drier climate as it steps into the new year.

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.
JanFebMarAprMayJunJulAugSepOctNovDec11810815214019629025129733032916481
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 December, La Union, Mexico experiences a humidity level of 91%, which is consistent with the high humidity characterizing the latter part of the year. This month sees slightly lower humidity than October and November, when levels peak at 92% and 91% respectively, just before the onset of the drier winter months. The transition from higher humidity in summer—with July and August dropping to 72% and 74%—towards the winter months marks a significant pattern. Generally, while December maintains a high humidity level, it serves as a reminder of the shift towards a more comfortable, albeit still humid, climate as the year concludes.

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, allowing you to see how December's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec89%86%83%80%82%79%72%74%84%92%91%91%
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, Mexico, experiences a UV Index of 7, placing it in the high exposure category, with a burn time of 25 minutes. This marks a noticeable decline from the extreme levels observed in the peak months of May through October, where the UV Index peaked at 13 and mandated a mere 10-minute burn time. The transition into December offers a bit of relief, making it an ideal time for outdoor activities while still encouraging caution. As the year wraps up, the UV Index trends downward, suggesting cooler conditions ahead, yet sun protection remains essential. For more detailed insights, visit 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.
JanFebMarAprMayJunJulAugSepOctNovDec810111213131312121197
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

La Union, Mexico, basks in a delightful December glow with 258 hours of sunshine, making it a welcoming escape as the year comes to a close. As the months progress, there's a clear upward trend in sunlight, peaking in May and July with over 300 hours, providing ample opportunity for outdoor adventures. Even though December sees a slight dip from November's 251 hours, it still promises plenty of sunny days, positioning La Union as an ideal winter retreat. Travelers can revel in the warmth and light, ushering in the New Year under the bliss of a sun-drenched sky.

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.
JanFebMarAprMayJunJulAugSepOctNovDec195h234h282h287h313h292h320h309h280h273h251h258h
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

As December arrives in La Union, Mexico, the likelihood of sunny weather significantly increases, boasting a notable 51% chance of sunshine. This upward trend contrasts with the months leading up to December, where sunny days begin to fluctuate, with the driest period peaking in March at 41%. Compared to the preceding months, including November at 33%, December's sunshine potential becomes a delightful draw for visitors seeking warmth and outdoor activities. The month marks a shift toward brighter days, setting the stage for a sunny festive season, making it an ideal time to explore the region’s natural beauty and coastal charm.

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.
JanFebMarAprMayJunJulAugSepOctNovDec24%29%41%35%32%12%22%31%19%32%33%51%
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, Mexico, the daylight duration experiences a clear seasonal pattern throughout the year. December marks a transitional phase, as daylight dips to 10 hours, signaling the approach of winter. This reduction follows a peak in the summer months, where daylight stretches to an impressive 13 hours in May, June, and July. As the year progresses towards fall, daylight gradually wanes, with August and September offering slightly shorter days of 12 hours. By October and November, the pattern continues, with both months retaining 11 hours of daylight. This cyclical rhythm provides residents and visitors alike the opportunity to enjoy a blend of vibrant sunny days during summer and a cozy atmosphere as the year closes.

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.
JanFebMarAprMayJunJulAugSepOctNovDec11h 2m11h 28m12h 2m12h 36m13h 5m13h 19m13h 11m12h 46m12h 13m11h 38m11h 9m10h 55m
Data source: La Union daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in La Union

In December, La Union, Mexico experiences a gentle average wind speed of 1.3 m/s (3 mph), maintaining a consistent calm that characterizes the months leading up to year’s end. This subtle uptick from the earlier winter months reflects a trend of stability throughout the year, where wind speeds remain relatively low, fluctuating only slightly from 1.2 to 1.5 m/s across the months. As the holiday season approaches, the pleasant breeze adds a refreshing touch to the tranquil atmosphere, inviting both locals and visitors to enjoy the coastal charm without the distractions of strong winds. Embracing this mellow December weather, La Union fosters a perfect setting for relaxation and outdoor adventures alike.

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.
JanFebMarAprMayJunJulAugSepOctNovDec1.21.41.51.51.51.21.21.31.21.21.31.3 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

The weather in La Union 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 La Union and find detailed weather information for every month.

In December, temperatures in La Union generally range from a minimum of 4°C (39°F) to a maximum of 30°C (86°F), with an average temperature of 18°C (64°F). The month experiences around 81 mm (3.2 in) of precipitation over 11 days and a high humidity level of 91%. In comparison, January sees slightly warmer temperatures, with a minimum of 6°C (43°F) and a maximum of 31°C (88°F), averaging at 17°C (63°F). The precipitation increases to 118 mm (4.6 in) over 16 days, accompanied by a slightly lower humidity of 88%. For more detailed information, you can check La Union weather in January.

When comparing the weather between December and February, February tends to be slightly warmer overall. December experiences a minimum temperature of 4°C (39°F) and an average of 18°C (64°F), while February starts at a minimum of 5°C (41°F) and averages around 19°C (66°F). The maximum temperatures also rise in February, reaching up to 33°C (92°F) compared to December's max of 30°C (86°F). Additionally, February sees more precipitation, with 108 mm (4.3 in) over 15 days, compared to December's 81 mm (3.2 in) over 11 days. However, February's humidity remains relatively lower at 86%, compared to December's 91%. For more detailed information, check out La Union weather in February.

Comparing the weather in December and March, we can see some notable differences. December experiences milder temperatures with a minimum of 4°C (39°F) and a maximum of 30°C (86°F), whereas March generally starts off warmer, with a minimum of 8°C (47°F) and a maximum of 33°C (92°F). Precipitation is also more significant in March, totaling 152 mm (6.0 in) over 18 days, compared to December's 81 mm (3.2 in) spread over 11 days. Additionally, while December boasts a higher humidity level at 91%, March maintains a slightly lower humidity of 83%. For a more detailed look at March weather, you can visit La Union weather in March.

In December, the weather features a mild temperature range with a minimum of 4°C (39°F), an average of 18°C (64°F), and a maximum of 30°C (86°F). The month experiences relatively high humidity at 91% and sees about 81 mm (3.2 in) of precipitation over 11 days. In contrast, April brings warmer temperatures, with a minimum of 11°C (52°F), an average of 23°C (74°F), and a peak reaching 35°C (96°F). Although April has a lower humidity level at 80%, it also experiences more rainfall, totaling 140 mm (5.5 in) over 13 days. For more details on the weather in April, visit La Union weather in April.

December and May present contrasting weather patterns, with December showcasing milder temperatures ranging from a minimum of 4°C (39°F) to a maximum of 30°C (86°F), accompanied by significant humidity at 91% and about 81 mm of rainfall over 11 days. In stark contrast, May features warmer conditions, boasting a minimum temperature of 15°C (59°F) and reaching up to 36°C (97°F), while experiencing higher precipitation levels of 196 mm over 19 days and slightly lower humidity at 82%. Such differences make each month unique for visitors, with warmer, wetter conditions in May outlined in more detail here: La Union weather in May.

When comparing December and June weather, a distinct contrast emerges. December experiences milder temperatures, with minimums around 4°C (39°F) and maximums reaching up to 30°C (86°F), averaging 18°C (64°F). The month is characterized by high humidity at 91% and moderate precipitation of 81 mm (3.2 in) over 11 days. In stark contrast, June sees significantly warmer temperatures, with minimums of 17°C (63°F) and maximums soaring to 35°C (95°F), resulting in an average temperature of 25°C (77°F). However, June is much wetter, with a total precipitation of 290 mm (11.4 in) over 23 days, and lower humidity at 79%. For a detailed look at June weather specifics, visit La Union weather in June.

December and July present notably different weather conditions. In December, temperatures range from a cooler minimum of 4°C (39°F) to a warm average of 18°C (64°F), peaking at 30°C (86°F). The humidity is high at 91%, and the month sees a modest 81 mm (3.2 in) of precipitation over 11 days. In contrast, July offers a much warmer climate, with minimum temperatures starting at 18°C (65°F) and averages reaching 25°C (77°F), going up to a maximum of 32°C (90°F). Moreover, July is significantly rainier, accumulating 251 mm (9.9 in) of rain over 28 days, accompanied by a lower humidity of 72%. For more detailed insights, you can check La Union weather in July.

When comparing the weather in December and August, December tends to be milder with temperatures ranging from a minimum of 4°C (39°F) to a maximum of 30°C (86°F), while August sees warmer temperatures, with a minimum of 17°C (63°F) and a maximum of 32°C (91°F). December experiences significantly higher humidity at 91%, compared to August's 74%, which contributes to a cooler feel during the winter month. Additionally, December has 81 mm (3.2 in) of precipitation over 11 days, while August is much wetter, accumulating 297 mm (11.7 in) of rainfall over 27 days. For more detailed insights on August weather, you can check out La Union weather in August.

December and September exhibit notably different weather patterns. In December, temperatures range from a minimum of 4°C (39°F) to a maximum of 30°C (86°F), with an average of 18°C (64°F). This month experiences relatively high humidity at 91% but less precipitation, totaling 81 mm (3.2 in) over 11 days. In contrast, September is warmer, with temperatures ranging from a minimum of 15°C (60°F) to a maximum of 34°C (93°F), and an average of 24°C (76°F). However, September is significantly wetter, receiving 330 mm (13.0 in) of rainfall over 24 days, accompanied by a slightly lower humidity of 84%. For more detailed information on September weather, you can refer to La Union weather in September.

In comparing the weather of December and October, there are notable differences in temperature and precipitation. December experiences a more moderate temperature range, with a minimum of 4°C (39°F), averaging 18°C (64°F), and a maximum of 30°C (86°F). In contrast, October is warmer, featuring a minimum of 14°C (57°F), an average of 23°C (73°F), and a maximum of 33°C (92°F).

Precipitation levels also vary significantly, with October receiving a considerable amount of rainfall totaling 329 mm (13.0 in) over 19 days, whereas December sees much less with only 81 mm (3.2 in) across 11 days. Additionally, humidity remains quite high in both months, with October at 92% and December slightly lower at 91%. For a more detailed look at October weather, you can visit La Union weather in October.

In comparing the weather between December and November, both months experience similar temperature ranges, with nighttime lows around 4°C (39°F) and daytime highs peaking at 30°C (86°F). However, November tends to be slightly warmer overall, boasting an average temperature of 20°C (68°F) compared to December's average of 18°C (64°F). Notably, December sees a significant reduction in precipitation, with only 81 mm (3.2 in) over 11 days, while November is much wetter, accumulating 164 mm (6.4 in) across 17 days. Despite the similarities in humidity levels, both months register at a high 91%, making the air feel consistently moist. For more detailed information on November weather, visit La Union weather in November.

Compare La Union's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in La Union

As December wraps up the year in La Union, the weather presents a unique contrast to the preceding months. With average temperatures hovering around a refreshing 18°C (64°F), it offers a cooler respite from the hotter summer days. The month experiences increased rainfall, with precipitation occurring on 11 days, contributing to a noticeably higher humidity level of 91%. While the maximum temperature reaches a comfortable 30°C (86°F), the nights can dip to a brisk 4°C (39°F), reminding visitors of the winter's chill. This dynamic blend of mild temperatures and heightened moisture creates a delightful atmosphere, making December a perfect time to explore the beauty of La Union. For more details on the weather patterns, check out La Union Climate.