nomadseason

December Weather in Rio Santiago, Mexico

Last updated: August 27, 2025

In December, the average temperature in Rio Santiago, Mexico is a pleasant 21°C (71°F). Expect a minimum of 14°C (57°F) and a maximum of 29°C (85°F), providing a comfortable range for outdoor activities. However, be prepared for some rain, as the area typically receives 23 mm (0.9 in) of precipitation over 7 days. With an average humidity of 70%, it's a great time to enjoy the lush scenery and vibrant atmosphere!

December Temperature in Rio Santiago

In December in Rio Santiago, the average temperature is 21°C (71°F). The maximum can reach 29°C (85°F) and the minimum can drop to as low as 14°C (57°F). This pleasant climate makes Rio Santiago an ideal destination for outdoor activities and sightseeing.

December Weather in Rio Santiago: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Rio Santiago, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rio Santiago, December typically has an average temperature of 21°C (71°F), with highs reaching up to 29°C (85°F) and lows dropping to around 14°C (57°F).
JanFebMarAprMayJunJulAugSepOctNovDec707173747574757474747270
Data source: Temperature data for Rio Santiago 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 Rio Santiago

In Rio Santiago in December, the total precipitation amount is 23 mm (0.9 in) over a duration of 7 days.

December Precipitation Trends in Rio Santiago

The chart displays monthly precipitation patterns in Rio Santiago, 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 Rio Santiago, December typically receives around 23 mm (0.9 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec12896953913024264533369223
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Rio Santiago

In Rio Santiago in December humidity is 70%. With an average temperature of 21°C (71°F), this humidity feels like a warm, enveloping blanket, making travel feel both comfortable and slightly sticky, requiring frequent breaks to stay refreshed.

December Average Humidity in Rio Santiago

This chart illustrates the average monthly humidity levels in Rio Santiago, 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 Rio Santiago is approximately 70%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec66%64%63%69%73%76%78%79%78%75%72%70%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Rio Santiago

In Rio Santiago 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 Rio Santiago.

Maximum UV Index Levels in Rio Santiago for December

The chart shows the monthly maximum UV Index (UVI) for Rio Santiago 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 Rio Santiago typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1011131413141313131298
Data source: Rio Santiago 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 Rio Santiago Compares to Other Months

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

This table compares monthly weather conditions in Rio Santiago, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather21°C (70°F)12 mm (0.5 inches)66%very high
February Weather22°C (71°F)8 mm (0.3 inches)64%extreme
March Weather23°C (73°F)9 mm (0.3 inches)63%extreme
April Weather23°C (74°F)6 mm (0.3 inches)69%extreme
May Weather24°C (76°F)95 mm (3.7 inches)73%extreme
June Weather23°C (74°F)391 mm (15.4 inches)76%extreme
July Weather24°C (75°F)302 mm (11.9 inches)78%extreme
August Weather23°C (75°F)426 mm (16.8 inches)79%extreme
September Weather23°C (74°F)453 mm (17.9 inches)78%extreme
October Weather23°C (74°F)336 mm (13.2 inches)75%extreme
November Weather22°C (73°F)92 mm (3.6 inches)72%very high
December Weather21°C (71°F)23 mm (0.9 inches)70%very high

Compare Rio Santiago's Climate with Cities Worldwide