nomadseason

December Weather in Santa Rosa (Santa Barbara), Mexico

Last updated: August 27, 2025

In Santa Rosa (Santa Barbara), Mexico, the average temperature in December hovers around 14°C (57°F), with minimums dipping to 2°C (35°F) and maximums reaching up to 25°C (78°F). During this period, expect around 19 mm (0.7 in) of precipitation spread over 4 days, contributing to an average humidity of 74%.

December Temperature in Santa Rosa (Santa Barbara)

In December in Santa Rosa (Santa Barbara), the average temperature is 14°C (57°F), with maximums reaching 25°C (78°F) and minimums dropping as low as 2°C (35°F). This range makes it a great time for travelers to experience mild weather while exploring the area.

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

The chart illustrates December temperature patterns in Santa Rosa (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 Rosa (Santa Barbara), December typically has an average temperature of 14°C (57°F), with highs reaching up to 25°C (78°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec565861646564636363625956
Data source: Temperature data for Santa Rosa (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 Rosa (Santa Barbara)

In Santa Rosa (Santa Barbara) in December, the precipitation amount is 19 mm (0.7 in) over the course of 4 days.

December Precipitation Trends in Santa Rosa (Santa Barbara)

The chart displays monthly precipitation patterns in Santa Rosa (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 Rosa (Santa Barbara), December typically receives around 19 mm (0.7 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec253432171282883613833321997319
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Santa Rosa (Santa Barbara)

In Santa Rosa (Santa Barbara) in December, humidity is 74%. With an average temperature of 14°C (57°F), this humidity feels like a warm, damp blanket wrapping around you, making it slightly uncomfortable for traveling, as you may find yourself quickly sweating and in need of frequent breaks to cool down.

December Average Humidity in Santa Rosa (Santa Barbara)

This chart illustrates the average monthly humidity levels in Santa Rosa (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 Rosa (Santa Barbara) is approximately 74%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec70%64%54%61%75%83%83%85%85%79%76%75%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Santa Rosa (Santa Barbara)

In Santa Rosa (Santa Barbara) in December, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Santa Rosa (Santa Barbara).

Maximum UV Index Levels in Santa Rosa (Santa Barbara) for December

The chart shows the monthly maximum UV Index (UVI) for Santa Rosa (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 Rosa (Santa Barbara) typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec10121415141514141412109
Data source: Santa Rosa (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 Rosa (Santa Barbara) Compares to Other Months

Weather in Santa Rosa (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 Rosa (Santa Barbara), focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Santa Rosa (Santa Barbara), showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (56°F)25 mm (1.0 inches)70%very high
February Weather14°C (58°F)34 mm (1.3 inches)64%extreme
March Weather16°C (62°F)32 mm (1.2 inches)54%extreme
April Weather18°C (64°F)17 mm (0.7 inches)61%extreme
May Weather19°C (66°F)128 mm (5.0 inches)75%extreme
June Weather18°C (65°F)288 mm (11.4 inches)83%extreme
July Weather17°C (63°F)361 mm (14.2 inches)83%extreme
August Weather17°C (64°F)383 mm (15.1 inches)85%extreme
September Weather17°C (63°F)332 mm (13.1 inches)85%extreme
October Weather17°C (63°F)199 mm (7.8 inches)79%extreme
November Weather15°C (60°F)73 mm (2.9 inches)76%very high
December Weather14°C (57°F)19 mm (0.7 inches)74%very high

Compare Santa Rosa (Santa Barbara)'s Climate with Cities Worldwide