nomadseason

December Weather in San Jose, Mexico

Last updated: August 27, 2025

In December, the average temperature in San Jose, Mexico is a comfortable 24°C (76°F). Expect a wide range, with minimums dipping to 13°C (55°F) and maximums soaring to 33°C (92°F). While you'll enjoy warm days, be prepared for some moisture, as the region sees an average precipitation amount of 49 mm (1.9 in) over 10 days. Don't forget to account for the high humidity, averaging 84%, which may make it feel quite warm!

December Temperature in San Jose

In December in San Jose, the average temperature is 24°C (76°F), with maximums reaching 33°C (92°F) and minimums dropping as low as 13°C (55°F). This pleasant climate makes it an ideal time for outdoor adventures and exploring the beauty of San Jose.

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 24°C (76°F), with highs reaching up to 33°C (92°F) and lows dropping to around 13°C (55°F).
JanFebMarAprMayJunJulAugSepOctNovDec757881858884858483817775
Data source: Temperature data for San Jose generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
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 total precipitation amount is 49 mm (1.9 in) over the course of 10 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 49 mm (1.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec42211732742499014921925111849
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in San Jose

In San Jose in December humidity is 84%. With an average temperature of 24°C (76°F), this humidity feels like a warm, damp embrace that can make outdoor activities feel sticky and uncomfortable, requiring frequent breaks in the shade and plenty of hydration for travelers.

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 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec79%73%64%61%60%59%64%76%80%82%83%84%
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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more 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 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec911131313141313121198
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 Weather24°C (75°F)42 mm (1.6 inches)78%very high
February Weather26°C (78°F)21 mm (0.8 inches)73%extreme
March Weather27°C (82°F)17 mm (0.7 inches)64%extreme
April Weather29°C (85°F)32 mm (1.3 inches)61%extreme
May Weather31°C (88°F)74 mm (2.9 inches)59%extreme
June Weather29°C (84°F)249 mm (9.8 inches)59%extreme
July Weather29°C (85°F)90 mm (3.5 inches)64%extreme
August Weather29°C (84°F)149 mm (5.9 inches)76%extreme
September Weather28°C (83°F)219 mm (8.6 inches)80%extreme
October Weather27°C (81°F)251 mm (9.9 inches)82%extreme
November Weather25°C (78°F)118 mm (4.7 inches)83%very high
December Weather24°C (76°F)49 mm (1.9 inches)84%very high

Compare San Jose's Climate with Cities Worldwide