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December Weather in La Union, Guatemala

Last updated: August 23, 2025

In December, the average temperature in La Union, Guatemala hovers around 21°C (70°F). Expect a comfortable climate with minimums dipping to 13°C (55°F) and highs reaching up to 31°C (88°F). Be prepared for some rain, as 98 mm (3.8 in) of precipitation may fall over 19 days, contributing to an average humidity of 74%.

December Temperature in La Union

In December in La Union, the average temperature is 21°C (70°F), with maximums reaching 31°C (88°F) and minimums dropping to as low as 13°C (55°F). This pleasant weather makes La Union an ideal destination for travelers seeking comfortable conditions and enjoyable outdoor activities.

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 21°C (70°F), with highs reaching up to 31°C (88°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec697172777877757576757169
Data source: Temperature data for La Union 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 La Union

In La Union in December, the total precipitation amount is 98 mm (3.8 in), recorded over a span of 19 days.

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 98 mm (3.8 inches) of precipitation spread over approximately 19 days.
JanFebMarAprMayJunJulAugSepOctNovDec8675795621332324126627528618098
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 in December humidity is 74%. With an average temperature of 21°C (70°F), this humidity feels like a warm, moist embrace, making outdoor activities both invigorating and slightly draining, so travelers should stay hydrated and take breaks often.

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 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec80%72%61%53%51%52%58%63%71%79%79%74%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in La Union

In La Union in December, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in La Union.

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 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121414141314141312109
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.

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.

This table compares monthly weather conditions in La Union, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather20°C (69°F)86 mm (3.4 inches)80%very high
February Weather22°C (71°F)75 mm (3.0 inches)72%extreme
March Weather22°C (73°F)78 mm (3.1 inches)61%extreme
April Weather25°C (77°F)56 mm (2.2 inches)53%extreme
May Weather25°C (78°F)213 mm (8.4 inches)51%extreme
June Weather25°C (77°F)323 mm (12.7 inches)52%extreme
July Weather24°C (75°F)241 mm (9.5 inches)58%extreme
August Weather24°C (76°F)266 mm (10.5 inches)63%extreme
September Weather24°C (76°F)275 mm (10.8 inches)71%extreme
October Weather24°C (75°F)286 mm (11.3 inches)79%extreme
November Weather22°C (71°F)180 mm (7.1 inches)79%very high
December Weather21°C (70°F)98 mm (3.8 inches)74%very high

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