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December Weather in San Bernardo, Chile

Last updated: August 22, 2025

In San Bernardo, Chile, the average temperature in December is a pleasant 21°C (70°F), making it an ideal time for outdoor activities. Expect a comfortable range, with minimum temperatures dropping to 10°C (50°F) and rising to a warm 35°C (96°F). Precipitation is light, averaging just 3 mm (0.1 in) over 0 days, and the relative humidity hovers around a refreshing 39%.

December Temperature in San Bernardo

In December in San Bernardo, the average temperature is 21°C (70°F), with maximums reaching up to 35°C (96°F) and minimums dropping as low as 10°C (50°F). This makes it an ideal time for travelers to enjoy warm days while also being prepared for cooler evenings.

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

The chart illustrates December temperature patterns in San Bernardo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Bernardo, December typically has an average temperature of 21°C (70°F), with highs reaching up to 35°C (96°F) and lows dropping to around 10°C (50°F).
JanFebMarAprMayJunJulAugSepOctNovDec717168625549485155596670
Data source: Temperature data for San Bernardo 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 Bernardo

In San Bernardo in December, the precipitation amount is 3 mm (0.1 in) during a total of 0 days.

December Precipitation Trends in San Bernardo

The chart displays monthly precipitation patterns in San Bernardo, 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 Bernardo, December typically receives around 3 mm (0.1 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec7651249996256413683
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Bernardo

In San Bernardo in December, humidity is 39%. With an average temperature of 21°C (70°F), this humidity feels like a pleasant, refreshing invitation for traveling, creating a comfortable atmosphere that enhances exploration and outdoor activities.

December Average Humidity in San Bernardo

This chart illustrates the average monthly humidity levels in San Bernardo, 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 Bernardo is approximately 39%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec41%41%46%52%64%71%75%73%56%61%52%39%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Bernardo

In San Bernardo in December, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Bernardo, you can check here.

Maximum UV Index Levels in San Bernardo for December

The chart shows the monthly maximum UV Index (UVI) for San Bernardo 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 Bernardo typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141211753468111214
Data source: San Bernardo 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 Bernardo Compares to Other Months

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

This table compares monthly weather conditions in San Bernardo, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather22°C (72°F)7 mm (0.3 inches)41%extreme
February Weather21°C (71°F)6 mm (0.2 inches)41%extreme
March Weather20°C (68°F)4 mm (0.2 inches)46%extreme
April Weather16°C (62°F)12 mm (0.5 inches)52%high
May Weather13°C (56°F)49 mm (1.9 inches)64%moderate
June Weather9°C (49°F)99 mm (3.9 inches)71%moderate
July Weather9°C (49°F)62 mm (2.4 inches)75%moderate
August Weather11°C (51°F)56 mm (2.2 inches)73%high
September Weather13°C (56°F)41 mm (1.6 inches)56%very high
October Weather15°C (60°F)36 mm (1.4 inches)61%extreme
November Weather19°C (66°F)8 mm (0.3 inches)52%extreme
December Weather21°C (70°F)3 mm (0.1 inches)39%extreme

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