nomadseason

December Weather in Santa Barbara, Mexico

Last updated: August 27, 2025

In Santa Barbara, Mexico, the average temperature in December hovers around 10°C (50°F). Expect a range of weather, with temperatures plummeting to a chilly -13°C (9°F) at night, while daytime highs can reach a pleasant 26°C (80°F). During this month, you can anticipate about 20 mm (0.8 in) of precipitation spread over just 2 days, contributing to an average humidity of a substantial 87%.

December Temperature in Santa Barbara

In December in Santa Barbara, the average temperature is 10°C (50°F). Maximum temperatures can reach 26°C (80°F), while minimums can drop as low as -13°C (9°F). Be sure to pack for a wide range of temperatures when traveling during this month.

December Weather in Santa Barbara: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Santa Barbara, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santa Barbara, December typically has an average temperature of 10°C (50°F), with highs reaching up to 26°C (80°F) and lows dropping to around -13°C (9°F).
JanFebMarAprMayJunJulAugSepOctNovDec505460667276727267645750
Data source: Temperature data for Santa Barbara 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 Santa Barbara

In Santa Barbara in December, the precipitation amount is 20 mm (0.8 in) over the course of 2 days.

December Precipitation Trends in Santa Barbara

The chart displays monthly precipitation patterns in Santa Barbara, 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 Santa Barbara, December typically receives around 20 mm (0.8 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec677683911092126422020
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Santa Barbara

In Santa Barbara in December humidity is 87%. With an average temperature of 10°C (50°F), this humidity feels like a heavy cloak wrapping around you, making every step feel laborious and the air thick with moisture, challenging your comfort while traveling.

December Average Humidity in Santa Barbara

This chart illustrates the average monthly humidity levels in Santa Barbara, 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 Santa Barbara is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec75%65%58%48%48%54%72%77%86%82%85%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Santa Barbara

In Santa Barbara in December, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Santa Barbara.

Maximum UV Index Levels in Santa Barbara for December

The chart shows the monthly maximum UV Index (UVI) for Santa Barbara 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 Santa Barbara typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec710121414131313131187
Data source: Santa Barbara 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 Santa Barbara Compares to Other Months

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

This table compares monthly weather conditions in Santa Barbara, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (50°F)6 mm (0.2 inches)75%high
February Weather12°C (54°F)7 mm (0.3 inches)65%very high
March Weather16°C (60°F)7 mm (0.3 inches)58%extreme
April Weather19°C (67°F)5 mm (0.2 inches)48%extreme
May Weather22°C (73°F)8 mm (0.3 inches)48%extreme
June Weather25°C (76°F)39 mm (1.6 inches)54%extreme
July Weather22°C (72°F)109 mm (4.3 inches)72%extreme
August Weather22°C (72°F)92 mm (3.6 inches)77%extreme
September Weather20°C (67°F)126 mm (5.0 inches)86%extreme
October Weather18°C (64°F)42 mm (1.7 inches)82%extreme
November Weather14°C (57°F)20 mm (0.8 inches)85%very high
December Weather10°C (50°F)20 mm (0.8 inches)87%high

Compare Santa Barbara's Climate with Cities Worldwide