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December Weather in San Jose, Peru

Last updated: August 27, 2025

In December, the average temperature in San Jose, Peru hovers around 17°C (63°F), with a minimum of 10°C (51°F) and a peak of 26°C (80°F). Expect a fair amount of rainfall, with a total precipitation of 247 mm (9.7 in) spread over 27 days. Additionally, the average humidity is a notable 82%, making for a muggy and humid atmosphere throughout the month.

December Temperature in San Jose

In December in San Jose, the average temperature is 17°C (63°F). Maximum temperatures can reach 26°C (80°F), while the minimum can drop to as low as 10°C (51°F). This mild climate makes San Jose an ideal destination for travelers looking to enjoy comfortable weather and outdoor activities.

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

The chart illustrates December temperature patterns in San Jose, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Jose, December typically has an average temperature of 17°C (63°F), with highs reaching up to 26°C (80°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec626362626160595960626363
Data source: Temperature data for San Jose 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 Jose

In San Jose in December, the precipitation amount is 247 mm (9.7 in) over a duration of 27 days.

December Precipitation Trends in San Jose

The chart displays monthly precipitation patterns in San Jose, 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 Jose, December typically receives around 247 mm (9.7 inches) of precipitation spread over approximately 27 days.
JanFebMarAprMayJunJulAugSepOctNovDec222222257207157131143142133183167247
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in San Jose

In San Jose in December, humidity is 82%. With an average temperature of 17°C (63°F), this humidity feels like a warm blanket wrapping around you—comfortable yet heavy, making outdoor activities more taxing and requiring frequent breaks for hydration.

December Average Humidity in San Jose

This chart illustrates the average monthly humidity levels in San Jose, 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 Jose is approximately 82%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec83%81%88%85%78%62%44%38%42%58%69%82%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in San Jose

In San Jose in December, the maximum UV index is 16, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, making it crucial to take protective measures. For detailed information, you can refer to the Hourly UV Index in San Jose.

Maximum UV Index Levels in San Jose for December

The chart shows the monthly maximum UV Index (UVI) for San Jose 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 Jose typically reaches 16, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec171718181513131416171616
Data source: San Jose 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 Jose Compares to Other Months

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

This table compares monthly weather conditions in San Jose, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather17°C (62°F)222 mm (8.8 inches)83%extreme
February Weather17°C (63°F)221 mm (8.7 inches)81%extreme
March Weather17°C (62°F)257 mm (10.1 inches)88%extreme
April Weather16°C (62°F)207 mm (8.1 inches)85%extreme
May Weather16°C (62°F)157 mm (6.2 inches)78%extreme
June Weather16°C (61°F)131 mm (5.1 inches)62%extreme
July Weather15°C (59°F)143 mm (5.6 inches)44%extreme
August Weather15°C (60°F)142 mm (5.6 inches)38%extreme
September Weather16°C (60°F)133 mm (5.3 inches)42%extreme
October Weather16°C (62°F)183 mm (7.2 inches)58%extreme
November Weather17°C (63°F)167 mm (6.6 inches)69%extreme
December Weather17°C (63°F)247 mm (9.7 inches)82%extreme

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