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December Weather in San Antonio, Panama

Last updated: August 27, 2025

In December, the average temperature in San Antonio, Panama hovers around 27°C (80°F). You can expect minimum temperatures of 21°C (69°F) and highs reaching 33°C (91°F). However, be prepared for some rain, as 95 mm (3.7 in) of precipitation typically falls over 13 days. With an average humidity of 79%, the air can feel quite tropical!

December Temperature in San Antonio

In December in San Antonio, the average temperature is 27°C (80°F). Maximums can reach 33°C (91°F) and minimums can be as low as 21°C (69°F). This makes San Antonio an ideal destination for travelers seeking warm and pleasant weather.

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

The chart illustrates December temperature patterns in San Antonio, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Antonio, December typically has an average temperature of 27°C (80°F), with highs reaching up to 33°C (91°F) and lows dropping to around 21°C (69°F).
JanFebMarAprMayJunJulAugSepOctNovDec808283838180808079797980
Data source: Temperature data for San Antonio 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 Antonio

In San Antonio in December, the precipitation amount is 95 mm (3.7 in) over the course of 13 days.

December Precipitation Trends in San Antonio

The chart displays monthly precipitation patterns in San Antonio, 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 Antonio, December typically receives around 95 mm (3.7 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec29987929530329027531434428095
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Antonio

In San Antonio in December humidity is 79%. With an average temperature of 27°C (80°F), this humidity feels like walking through a warm, dense blanket, making travel feel sluggish and allowing every step to become noticeably heavier.

December Average Humidity in San Antonio

This chart illustrates the average monthly humidity levels in San Antonio, 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 Antonio is approximately 79%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%76%74%76%78%83%80%79%78%77%79%79%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Antonio

In San Antonio in December, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in San Antonio.

Maximum UV Index Levels in San Antonio for December

The chart shows the monthly maximum UV Index (UVI) for San Antonio 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 Antonio typically reaches 10, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121314151513131313131210
Data source: San Antonio 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 Antonio Compares to Other Months

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

This table compares monthly weather conditions in San Antonio, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather27°C (80°F)29 mm (1.1 inches)76%extreme
February Weather28°C (82°F)9 mm (0.4 inches)75%extreme
March Weather28°C (83°F)8 mm (0.3 inches)74%extreme
April Weather28°C (83°F)79 mm (3.1 inches)76%extreme
May Weather27°C (81°F)295 mm (11.6 inches)78%extreme
June Weather27°C (80°F)303 mm (11.9 inches)83%extreme
July Weather27°C (80°F)290 mm (11.4 inches)79%extreme
August Weather27°C (80°F)275 mm (10.8 inches)79%extreme
September Weather26°C (80°F)314 mm (12.4 inches)78%extreme
October Weather26°C (79°F)343 mm (13.5 inches)77%extreme
November Weather26°C (79°F)280 mm (11.0 inches)79%extreme
December Weather27°C (80°F)95 mm (3.7 inches)79%very high

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