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December Weather in San Agustin, El Salvador

Last updated: August 23, 2025

In December, the average temperature in San Agustin, El Salvador hovers around 27°C (81°F). This delightful climate can see minimums as low as 19°C (66°F) and peak at a sizzling 37°C (98°F). Visitors should expect 5 mm (0.2 in) of precipitation over the course of 2 days, with an average humidity level of 66% – perfect for enjoying the vibrant surroundings!

December Temperature in San Agustin

In December in San Agustin, the average temperature is 27°C (81°F). Maximums can reach 37°C (98°F) and minimums can be as low as 19°C (66°F). This makes it a great time to travel if you enjoy warm weather, but be prepared for some heat during the day and cooler evenings.

December Weather in San Agustin: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in San Agustin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Agustin, December typically has an average temperature of 27°C (81°F), with highs reaching up to 37°C (98°F) and lows dropping to around 19°C (66°F).
JanFebMarAprMayJunJulAugSepOctNovDec818385858381838281808080
Data source: Temperature data for San Agustin 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 San Agustin

In San Agustin in December, the precipitation amount is 5 mm (0.2 in) over a period of 2 days.

December Precipitation Trends in San Agustin

The chart displays monthly precipitation patterns in San Agustin, 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 San Agustin, December typically receives around 5 mm (0.2 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec13534266350144293296358705
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Agustin

In San Agustin in December, humidity is 66%. With an average temperature of 27°C (81°F), this humidity feels like a warm, sticky embrace, making outdoor exploration feel a bit more intense while increasing the need for hydration as you navigate through the sights.

December Average Humidity in San Agustin

This chart illustrates the average monthly humidity levels in San Agustin, 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 San Agustin is approximately 66%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec63%62%59%59%59%68%78%79%77%77%75%67%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Agustin

In San Agustin 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 San Agustin.

Maximum UV Index Levels in San Agustin for December

The chart shows the monthly maximum UV Index (UVI) for San Agustin 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 San Agustin typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec11121414141413131313109
Data source: San Agustin 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 San Agustin Compares to Other Months

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

This table compares monthly weather conditions in San Agustin, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (82°F)1 mm (0.0 inches)63%extreme
February Weather28°C (83°F)3 mm (0.1 inches)62%extreme
March Weather29°C (85°F)5 mm (0.2 inches)59%extreme
April Weather29°C (85°F)34 mm (1.3 inches)59%extreme
May Weather28°C (83°F)266 mm (10.5 inches)59%extreme
June Weather27°C (81°F)350 mm (13.8 inches)68%extreme
July Weather28°C (83°F)144 mm (5.7 inches)77%extreme
August Weather28°C (82°F)293 mm (11.5 inches)79%extreme
September Weather27°C (81°F)296 mm (11.6 inches)77%extreme
October Weather26°C (80°F)358 mm (14.1 inches)77%extreme
November Weather27°C (80°F)70 mm (2.8 inches)75%very high
December Weather27°C (81°F)5 mm (0.2 inches)66%very high

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